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2233ad4534
Allow a safer "rewind of the remote tip" push than blind "--force", by requiring that the overwritten remote ref to be unchanged since the new history to replace it was prepared. The machinery is more or less ready. The "--force" option is again the big red button to override any safety, thanks to J6t's sanity (the original round allowed --lockref to defeat --force). The logic to choose the default implemented here is fragile (e.g. "git fetch" after seeing a failure will update the remote-tracking branch and will make the next "push" pass, defeating the safety pretty easily). It is suitable only for the simplest workflows, and it may hurt users more than it helps them. * jc/push-cas: push: teach --force-with-lease to smart-http transport send-pack: fix parsing of --force-with-lease option t5540/5541: smart-http does not support "--force-with-lease" t5533: test "push --force-with-lease" push --force-with-lease: tie it all together push --force-with-lease: implement logic to populate old_sha1_expect[] remote.c: add command line option parser for "--force-with-lease" builtin/push.c: use OPT_BOOL, not OPT_BOOLEAN cache.h: move remote/connect API out of it
2090 lines
51 KiB
C
2090 lines
51 KiB
C
#include "cache.h"
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#include "remote.h"
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#include "refs.h"
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#include "commit.h"
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#include "diff.h"
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#include "revision.h"
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#include "dir.h"
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#include "tag.h"
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#include "string-list.h"
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#include "mergesort.h"
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enum map_direction { FROM_SRC, FROM_DST };
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static struct refspec s_tag_refspec = {
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0,
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1,
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0,
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0,
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"refs/tags/*",
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"refs/tags/*"
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};
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const struct refspec *tag_refspec = &s_tag_refspec;
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struct counted_string {
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size_t len;
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const char *s;
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};
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struct rewrite {
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const char *base;
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size_t baselen;
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struct counted_string *instead_of;
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int instead_of_nr;
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int instead_of_alloc;
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};
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struct rewrites {
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struct rewrite **rewrite;
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int rewrite_alloc;
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int rewrite_nr;
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};
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static struct remote **remotes;
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static int remotes_alloc;
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static int remotes_nr;
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static struct branch **branches;
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static int branches_alloc;
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static int branches_nr;
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static struct branch *current_branch;
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static const char *default_remote_name;
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static const char *pushremote_name;
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static int explicit_default_remote_name;
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static struct rewrites rewrites;
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static struct rewrites rewrites_push;
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#define BUF_SIZE (2048)
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static char buffer[BUF_SIZE];
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static int valid_remote(const struct remote *remote)
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{
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return (!!remote->url) || (!!remote->foreign_vcs);
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}
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static const char *alias_url(const char *url, struct rewrites *r)
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{
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int i, j;
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char *ret;
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struct counted_string *longest;
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int longest_i;
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longest = NULL;
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longest_i = -1;
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for (i = 0; i < r->rewrite_nr; i++) {
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if (!r->rewrite[i])
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continue;
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for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) {
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if (!prefixcmp(url, r->rewrite[i]->instead_of[j].s) &&
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(!longest ||
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longest->len < r->rewrite[i]->instead_of[j].len)) {
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longest = &(r->rewrite[i]->instead_of[j]);
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longest_i = i;
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}
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}
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}
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if (!longest)
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return url;
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ret = xmalloc(r->rewrite[longest_i]->baselen +
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(strlen(url) - longest->len) + 1);
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strcpy(ret, r->rewrite[longest_i]->base);
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strcpy(ret + r->rewrite[longest_i]->baselen, url + longest->len);
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return ret;
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}
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static void add_push_refspec(struct remote *remote, const char *ref)
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{
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ALLOC_GROW(remote->push_refspec,
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remote->push_refspec_nr + 1,
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remote->push_refspec_alloc);
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remote->push_refspec[remote->push_refspec_nr++] = ref;
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}
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static void add_fetch_refspec(struct remote *remote, const char *ref)
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{
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ALLOC_GROW(remote->fetch_refspec,
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remote->fetch_refspec_nr + 1,
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remote->fetch_refspec_alloc);
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remote->fetch_refspec[remote->fetch_refspec_nr++] = ref;
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}
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static void add_url(struct remote *remote, const char *url)
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{
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ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
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remote->url[remote->url_nr++] = url;
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}
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static void add_pushurl(struct remote *remote, const char *pushurl)
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{
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ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc);
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remote->pushurl[remote->pushurl_nr++] = pushurl;
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}
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static void add_pushurl_alias(struct remote *remote, const char *url)
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{
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const char *pushurl = alias_url(url, &rewrites_push);
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if (pushurl != url)
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add_pushurl(remote, pushurl);
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}
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static void add_url_alias(struct remote *remote, const char *url)
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{
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add_url(remote, alias_url(url, &rewrites));
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add_pushurl_alias(remote, url);
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}
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static struct remote *make_remote(const char *name, int len)
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{
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struct remote *ret;
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int i;
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for (i = 0; i < remotes_nr; i++) {
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if (len ? (!strncmp(name, remotes[i]->name, len) &&
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!remotes[i]->name[len]) :
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!strcmp(name, remotes[i]->name))
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return remotes[i];
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}
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ret = xcalloc(1, sizeof(struct remote));
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ret->prune = -1; /* unspecified */
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ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
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remotes[remotes_nr++] = ret;
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if (len)
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ret->name = xstrndup(name, len);
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else
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ret->name = xstrdup(name);
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return ret;
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}
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static void add_merge(struct branch *branch, const char *name)
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{
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ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
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branch->merge_alloc);
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branch->merge_name[branch->merge_nr++] = name;
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}
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static struct branch *make_branch(const char *name, int len)
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{
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struct branch *ret;
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int i;
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char *refname;
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for (i = 0; i < branches_nr; i++) {
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if (len ? (!strncmp(name, branches[i]->name, len) &&
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!branches[i]->name[len]) :
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!strcmp(name, branches[i]->name))
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return branches[i];
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}
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ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
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ret = xcalloc(1, sizeof(struct branch));
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branches[branches_nr++] = ret;
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if (len)
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ret->name = xstrndup(name, len);
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else
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ret->name = xstrdup(name);
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refname = xmalloc(strlen(name) + strlen("refs/heads/") + 1);
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strcpy(refname, "refs/heads/");
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strcpy(refname + strlen("refs/heads/"), ret->name);
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ret->refname = refname;
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return ret;
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}
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static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len)
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{
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struct rewrite *ret;
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int i;
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for (i = 0; i < r->rewrite_nr; i++) {
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if (len
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? (len == r->rewrite[i]->baselen &&
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!strncmp(base, r->rewrite[i]->base, len))
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: !strcmp(base, r->rewrite[i]->base))
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return r->rewrite[i];
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}
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ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc);
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ret = xcalloc(1, sizeof(struct rewrite));
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r->rewrite[r->rewrite_nr++] = ret;
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if (len) {
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ret->base = xstrndup(base, len);
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ret->baselen = len;
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}
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else {
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ret->base = xstrdup(base);
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ret->baselen = strlen(base);
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}
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return ret;
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}
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static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
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{
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ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc);
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rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
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rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
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rewrite->instead_of_nr++;
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}
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static void read_remotes_file(struct remote *remote)
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{
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FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
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if (!f)
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return;
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remote->origin = REMOTE_REMOTES;
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while (fgets(buffer, BUF_SIZE, f)) {
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int value_list;
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char *s, *p;
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if (!prefixcmp(buffer, "URL:")) {
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value_list = 0;
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s = buffer + 4;
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} else if (!prefixcmp(buffer, "Push:")) {
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value_list = 1;
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s = buffer + 5;
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} else if (!prefixcmp(buffer, "Pull:")) {
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value_list = 2;
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s = buffer + 5;
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} else
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continue;
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while (isspace(*s))
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s++;
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if (!*s)
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continue;
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p = s + strlen(s);
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while (isspace(p[-1]))
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*--p = 0;
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switch (value_list) {
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case 0:
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add_url_alias(remote, xstrdup(s));
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break;
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case 1:
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add_push_refspec(remote, xstrdup(s));
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break;
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case 2:
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add_fetch_refspec(remote, xstrdup(s));
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break;
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}
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}
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fclose(f);
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}
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static void read_branches_file(struct remote *remote)
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{
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char *frag;
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struct strbuf branch = STRBUF_INIT;
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int n = 1000;
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FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
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char *s, *p;
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int len;
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if (!f)
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return;
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s = fgets(buffer, BUF_SIZE, f);
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fclose(f);
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if (!s)
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return;
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while (isspace(*s))
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s++;
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if (!*s)
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return;
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remote->origin = REMOTE_BRANCHES;
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p = s + strlen(s);
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while (isspace(p[-1]))
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*--p = 0;
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len = p - s;
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p = xmalloc(len + 1);
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strcpy(p, s);
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/*
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* The branches file would have URL and optionally
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* #branch specified. The "master" (or specified) branch is
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* fetched and stored in the local branch of the same name.
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*/
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frag = strchr(p, '#');
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if (frag) {
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*(frag++) = '\0';
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strbuf_addf(&branch, "refs/heads/%s", frag);
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} else
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strbuf_addstr(&branch, "refs/heads/master");
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strbuf_addf(&branch, ":refs/heads/%s", remote->name);
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add_url_alias(remote, p);
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add_fetch_refspec(remote, strbuf_detach(&branch, NULL));
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/*
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* Cogito compatible push: push current HEAD to remote #branch
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* (master if missing)
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*/
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strbuf_init(&branch, 0);
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strbuf_addstr(&branch, "HEAD");
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if (frag)
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strbuf_addf(&branch, ":refs/heads/%s", frag);
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else
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strbuf_addstr(&branch, ":refs/heads/master");
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add_push_refspec(remote, strbuf_detach(&branch, NULL));
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remote->fetch_tags = 1; /* always auto-follow */
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}
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static int handle_config(const char *key, const char *value, void *cb)
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{
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const char *name;
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const char *subkey;
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struct remote *remote;
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struct branch *branch;
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if (!prefixcmp(key, "branch.")) {
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name = key + 7;
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subkey = strrchr(name, '.');
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if (!subkey)
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return 0;
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branch = make_branch(name, subkey - name);
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if (!strcmp(subkey, ".remote")) {
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if (git_config_string(&branch->remote_name, key, value))
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return -1;
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if (branch == current_branch) {
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default_remote_name = branch->remote_name;
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explicit_default_remote_name = 1;
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}
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} else if (!strcmp(subkey, ".pushremote")) {
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if (branch == current_branch)
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if (git_config_string(&pushremote_name, key, value))
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return -1;
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} else if (!strcmp(subkey, ".merge")) {
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if (!value)
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return config_error_nonbool(key);
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add_merge(branch, xstrdup(value));
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}
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return 0;
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}
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if (!prefixcmp(key, "url.")) {
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struct rewrite *rewrite;
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name = key + 4;
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subkey = strrchr(name, '.');
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if (!subkey)
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return 0;
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if (!strcmp(subkey, ".insteadof")) {
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rewrite = make_rewrite(&rewrites, name, subkey - name);
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if (!value)
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return config_error_nonbool(key);
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add_instead_of(rewrite, xstrdup(value));
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} else if (!strcmp(subkey, ".pushinsteadof")) {
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rewrite = make_rewrite(&rewrites_push, name, subkey - name);
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if (!value)
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return config_error_nonbool(key);
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add_instead_of(rewrite, xstrdup(value));
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}
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}
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if (prefixcmp(key, "remote."))
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return 0;
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name = key + 7;
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/* Handle remote.* variables */
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if (!strcmp(name, "pushdefault"))
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return git_config_string(&pushremote_name, key, value);
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/* Handle remote.<name>.* variables */
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if (*name == '/') {
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warning("Config remote shorthand cannot begin with '/': %s",
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name);
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return 0;
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}
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subkey = strrchr(name, '.');
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if (!subkey)
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return 0;
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remote = make_remote(name, subkey - name);
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remote->origin = REMOTE_CONFIG;
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if (!strcmp(subkey, ".mirror"))
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remote->mirror = git_config_bool(key, value);
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else if (!strcmp(subkey, ".skipdefaultupdate"))
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remote->skip_default_update = git_config_bool(key, value);
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else if (!strcmp(subkey, ".skipfetchall"))
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remote->skip_default_update = git_config_bool(key, value);
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else if (!strcmp(subkey, ".prune"))
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remote->prune = git_config_bool(key, value);
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else if (!strcmp(subkey, ".url")) {
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const char *v;
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if (git_config_string(&v, key, value))
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return -1;
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add_url(remote, v);
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} else if (!strcmp(subkey, ".pushurl")) {
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const char *v;
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if (git_config_string(&v, key, value))
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return -1;
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add_pushurl(remote, v);
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} else if (!strcmp(subkey, ".push")) {
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const char *v;
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if (git_config_string(&v, key, value))
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return -1;
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add_push_refspec(remote, v);
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} else if (!strcmp(subkey, ".fetch")) {
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const char *v;
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if (git_config_string(&v, key, value))
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return -1;
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add_fetch_refspec(remote, v);
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} else if (!strcmp(subkey, ".receivepack")) {
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const char *v;
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if (git_config_string(&v, key, value))
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return -1;
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if (!remote->receivepack)
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remote->receivepack = v;
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else
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error("more than one receivepack given, using the first");
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} else if (!strcmp(subkey, ".uploadpack")) {
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const char *v;
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if (git_config_string(&v, key, value))
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return -1;
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if (!remote->uploadpack)
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remote->uploadpack = v;
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else
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error("more than one uploadpack given, using the first");
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} else if (!strcmp(subkey, ".tagopt")) {
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if (!strcmp(value, "--no-tags"))
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remote->fetch_tags = -1;
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else if (!strcmp(value, "--tags"))
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remote->fetch_tags = 2;
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} else if (!strcmp(subkey, ".proxy")) {
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return git_config_string((const char **)&remote->http_proxy,
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key, value);
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} else if (!strcmp(subkey, ".vcs")) {
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return git_config_string(&remote->foreign_vcs, key, value);
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}
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return 0;
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}
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static void alias_all_urls(void)
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{
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int i, j;
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for (i = 0; i < remotes_nr; i++) {
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int add_pushurl_aliases;
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if (!remotes[i])
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continue;
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for (j = 0; j < remotes[i]->pushurl_nr; j++) {
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remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
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}
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add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
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for (j = 0; j < remotes[i]->url_nr; j++) {
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if (add_pushurl_aliases)
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add_pushurl_alias(remotes[i], remotes[i]->url[j]);
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remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
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}
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}
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}
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|
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static void read_config(void)
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{
|
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unsigned char sha1[20];
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const char *head_ref;
|
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int flag;
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if (default_remote_name) /* did this already */
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return;
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default_remote_name = xstrdup("origin");
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current_branch = NULL;
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head_ref = resolve_ref_unsafe("HEAD", sha1, 0, &flag);
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if (head_ref && (flag & REF_ISSYMREF) &&
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!prefixcmp(head_ref, "refs/heads/")) {
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current_branch =
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make_branch(head_ref + strlen("refs/heads/"), 0);
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}
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git_config(handle_config, NULL);
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|
alias_all_urls();
|
|
}
|
|
|
|
/*
|
|
* This function frees a refspec array.
|
|
* Warning: code paths should be checked to ensure that the src
|
|
* and dst pointers are always freeable pointers as well
|
|
* as the refspec pointer itself.
|
|
*/
|
|
static void free_refspecs(struct refspec *refspec, int nr_refspec)
|
|
{
|
|
int i;
|
|
|
|
if (!refspec)
|
|
return;
|
|
|
|
for (i = 0; i < nr_refspec; i++) {
|
|
free(refspec[i].src);
|
|
free(refspec[i].dst);
|
|
}
|
|
free(refspec);
|
|
}
|
|
|
|
static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
|
|
{
|
|
int i;
|
|
struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
|
|
|
|
for (i = 0; i < nr_refspec; i++) {
|
|
size_t llen;
|
|
int is_glob;
|
|
const char *lhs, *rhs;
|
|
int flags;
|
|
|
|
is_glob = 0;
|
|
|
|
lhs = refspec[i];
|
|
if (*lhs == '+') {
|
|
rs[i].force = 1;
|
|
lhs++;
|
|
}
|
|
|
|
rhs = strrchr(lhs, ':');
|
|
|
|
/*
|
|
* Before going on, special case ":" (or "+:") as a refspec
|
|
* for pushing matching refs.
|
|
*/
|
|
if (!fetch && rhs == lhs && rhs[1] == '\0') {
|
|
rs[i].matching = 1;
|
|
continue;
|
|
}
|
|
|
|
if (rhs) {
|
|
size_t rlen = strlen(++rhs);
|
|
is_glob = (1 <= rlen && strchr(rhs, '*'));
|
|
rs[i].dst = xstrndup(rhs, rlen);
|
|
}
|
|
|
|
llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
|
|
if (1 <= llen && memchr(lhs, '*', llen)) {
|
|
if ((rhs && !is_glob) || (!rhs && fetch))
|
|
goto invalid;
|
|
is_glob = 1;
|
|
} else if (rhs && is_glob) {
|
|
goto invalid;
|
|
}
|
|
|
|
rs[i].pattern = is_glob;
|
|
rs[i].src = xstrndup(lhs, llen);
|
|
flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0);
|
|
|
|
if (fetch) {
|
|
unsigned char unused[40];
|
|
|
|
/* LHS */
|
|
if (!*rs[i].src)
|
|
; /* empty is ok; it means "HEAD" */
|
|
else if (llen == 40 && !get_sha1_hex(rs[i].src, unused))
|
|
rs[i].exact_sha1 = 1; /* ok */
|
|
else if (!check_refname_format(rs[i].src, flags))
|
|
; /* valid looking ref is ok */
|
|
else
|
|
goto invalid;
|
|
/* RHS */
|
|
if (!rs[i].dst)
|
|
; /* missing is ok; it is the same as empty */
|
|
else if (!*rs[i].dst)
|
|
; /* empty is ok; it means "do not store" */
|
|
else if (!check_refname_format(rs[i].dst, flags))
|
|
; /* valid looking ref is ok */
|
|
else
|
|
goto invalid;
|
|
} else {
|
|
/*
|
|
* LHS
|
|
* - empty is allowed; it means delete.
|
|
* - when wildcarded, it must be a valid looking ref.
|
|
* - otherwise, it must be an extended SHA-1, but
|
|
* there is no existing way to validate this.
|
|
*/
|
|
if (!*rs[i].src)
|
|
; /* empty is ok */
|
|
else if (is_glob) {
|
|
if (check_refname_format(rs[i].src, flags))
|
|
goto invalid;
|
|
}
|
|
else
|
|
; /* anything goes, for now */
|
|
/*
|
|
* RHS
|
|
* - missing is allowed, but LHS then must be a
|
|
* valid looking ref.
|
|
* - empty is not allowed.
|
|
* - otherwise it must be a valid looking ref.
|
|
*/
|
|
if (!rs[i].dst) {
|
|
if (check_refname_format(rs[i].src, flags))
|
|
goto invalid;
|
|
} else if (!*rs[i].dst) {
|
|
goto invalid;
|
|
} else {
|
|
if (check_refname_format(rs[i].dst, flags))
|
|
goto invalid;
|
|
}
|
|
}
|
|
}
|
|
return rs;
|
|
|
|
invalid:
|
|
if (verify) {
|
|
/*
|
|
* nr_refspec must be greater than zero and i must be valid
|
|
* since it is only possible to reach this point from within
|
|
* the for loop above.
|
|
*/
|
|
free_refspecs(rs, i+1);
|
|
return NULL;
|
|
}
|
|
die("Invalid refspec '%s'", refspec[i]);
|
|
}
|
|
|
|
int valid_fetch_refspec(const char *fetch_refspec_str)
|
|
{
|
|
struct refspec *refspec;
|
|
|
|
refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1);
|
|
free_refspecs(refspec, 1);
|
|
return !!refspec;
|
|
}
|
|
|
|
struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
|
|
{
|
|
return parse_refspec_internal(nr_refspec, refspec, 1, 0);
|
|
}
|
|
|
|
static struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
|
|
{
|
|
return parse_refspec_internal(nr_refspec, refspec, 0, 0);
|
|
}
|
|
|
|
void free_refspec(int nr_refspec, struct refspec *refspec)
|
|
{
|
|
int i;
|
|
for (i = 0; i < nr_refspec; i++) {
|
|
free(refspec[i].src);
|
|
free(refspec[i].dst);
|
|
}
|
|
free(refspec);
|
|
}
|
|
|
|
static int valid_remote_nick(const char *name)
|
|
{
|
|
if (!name[0] || is_dot_or_dotdot(name))
|
|
return 0;
|
|
return !strchr(name, '/'); /* no slash */
|
|
}
|
|
|
|
static struct remote *remote_get_1(const char *name, const char *pushremote_name)
|
|
{
|
|
struct remote *ret;
|
|
int name_given = 0;
|
|
|
|
if (name)
|
|
name_given = 1;
|
|
else {
|
|
if (pushremote_name) {
|
|
name = pushremote_name;
|
|
name_given = 1;
|
|
} else {
|
|
name = default_remote_name;
|
|
name_given = explicit_default_remote_name;
|
|
}
|
|
}
|
|
|
|
ret = make_remote(name, 0);
|
|
if (valid_remote_nick(name)) {
|
|
if (!valid_remote(ret))
|
|
read_remotes_file(ret);
|
|
if (!valid_remote(ret))
|
|
read_branches_file(ret);
|
|
}
|
|
if (name_given && !valid_remote(ret))
|
|
add_url_alias(ret, name);
|
|
if (!valid_remote(ret))
|
|
return NULL;
|
|
ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
|
|
ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
|
|
return ret;
|
|
}
|
|
|
|
struct remote *remote_get(const char *name)
|
|
{
|
|
read_config();
|
|
return remote_get_1(name, NULL);
|
|
}
|
|
|
|
struct remote *pushremote_get(const char *name)
|
|
{
|
|
read_config();
|
|
return remote_get_1(name, pushremote_name);
|
|
}
|
|
|
|
int remote_is_configured(const char *name)
|
|
{
|
|
int i;
|
|
read_config();
|
|
|
|
for (i = 0; i < remotes_nr; i++)
|
|
if (!strcmp(name, remotes[i]->name))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
int for_each_remote(each_remote_fn fn, void *priv)
|
|
{
|
|
int i, result = 0;
|
|
read_config();
|
|
for (i = 0; i < remotes_nr && !result; i++) {
|
|
struct remote *r = remotes[i];
|
|
if (!r)
|
|
continue;
|
|
if (!r->fetch)
|
|
r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
|
|
r->fetch_refspec);
|
|
if (!r->push)
|
|
r->push = parse_push_refspec(r->push_refspec_nr,
|
|
r->push_refspec);
|
|
result = fn(r, priv);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void ref_remove_duplicates(struct ref *ref_map)
|
|
{
|
|
struct string_list refs = STRING_LIST_INIT_NODUP;
|
|
struct string_list_item *item = NULL;
|
|
struct ref *prev = NULL, *next = NULL;
|
|
for (; ref_map; prev = ref_map, ref_map = next) {
|
|
next = ref_map->next;
|
|
if (!ref_map->peer_ref)
|
|
continue;
|
|
|
|
item = string_list_lookup(&refs, ref_map->peer_ref->name);
|
|
if (item) {
|
|
if (strcmp(((struct ref *)item->util)->name,
|
|
ref_map->name))
|
|
die("%s tracks both %s and %s",
|
|
ref_map->peer_ref->name,
|
|
((struct ref *)item->util)->name,
|
|
ref_map->name);
|
|
prev->next = ref_map->next;
|
|
free(ref_map->peer_ref);
|
|
free(ref_map);
|
|
ref_map = prev; /* skip this; we freed it */
|
|
continue;
|
|
}
|
|
|
|
item = string_list_insert(&refs, ref_map->peer_ref->name);
|
|
item->util = ref_map;
|
|
}
|
|
string_list_clear(&refs, 0);
|
|
}
|
|
|
|
int remote_has_url(struct remote *remote, const char *url)
|
|
{
|
|
int i;
|
|
for (i = 0; i < remote->url_nr; i++) {
|
|
if (!strcmp(remote->url[i], url))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int match_name_with_pattern(const char *key, const char *name,
|
|
const char *value, char **result)
|
|
{
|
|
const char *kstar = strchr(key, '*');
|
|
size_t klen;
|
|
size_t ksuffixlen;
|
|
size_t namelen;
|
|
int ret;
|
|
if (!kstar)
|
|
die("Key '%s' of pattern had no '*'", key);
|
|
klen = kstar - key;
|
|
ksuffixlen = strlen(kstar + 1);
|
|
namelen = strlen(name);
|
|
ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
|
|
!memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
|
|
if (ret && value) {
|
|
const char *vstar = strchr(value, '*');
|
|
size_t vlen;
|
|
size_t vsuffixlen;
|
|
if (!vstar)
|
|
die("Value '%s' of pattern has no '*'", value);
|
|
vlen = vstar - value;
|
|
vsuffixlen = strlen(vstar + 1);
|
|
*result = xmalloc(vlen + vsuffixlen +
|
|
strlen(name) -
|
|
klen - ksuffixlen + 1);
|
|
strncpy(*result, value, vlen);
|
|
strncpy(*result + vlen,
|
|
name + klen, namelen - klen - ksuffixlen);
|
|
strcpy(*result + vlen + namelen - klen - ksuffixlen,
|
|
vstar + 1);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int query_refspecs(struct refspec *refs, int ref_count, struct refspec *query)
|
|
{
|
|
int i;
|
|
int find_src = !query->src;
|
|
|
|
if (find_src && !query->dst)
|
|
return error("query_refspecs: need either src or dst");
|
|
|
|
for (i = 0; i < ref_count; i++) {
|
|
struct refspec *refspec = &refs[i];
|
|
const char *key = find_src ? refspec->dst : refspec->src;
|
|
const char *value = find_src ? refspec->src : refspec->dst;
|
|
const char *needle = find_src ? query->dst : query->src;
|
|
char **result = find_src ? &query->src : &query->dst;
|
|
|
|
if (!refspec->dst)
|
|
continue;
|
|
if (refspec->pattern) {
|
|
if (match_name_with_pattern(key, needle, value, result)) {
|
|
query->force = refspec->force;
|
|
return 0;
|
|
}
|
|
} else if (!strcmp(needle, key)) {
|
|
*result = xstrdup(value);
|
|
query->force = refspec->force;
|
|
return 0;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
|
|
const char *name)
|
|
{
|
|
struct refspec query;
|
|
|
|
memset(&query, 0, sizeof(struct refspec));
|
|
query.src = (char *)name;
|
|
|
|
if (query_refspecs(refspecs, nr_refspec, &query))
|
|
return NULL;
|
|
|
|
return query.dst;
|
|
}
|
|
|
|
int remote_find_tracking(struct remote *remote, struct refspec *refspec)
|
|
{
|
|
return query_refspecs(remote->fetch, remote->fetch_refspec_nr, refspec);
|
|
}
|
|
|
|
static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
|
|
const char *name)
|
|
{
|
|
size_t len = strlen(name);
|
|
struct ref *ref = xcalloc(1, sizeof(struct ref) + prefixlen + len + 1);
|
|
memcpy(ref->name, prefix, prefixlen);
|
|
memcpy(ref->name + prefixlen, name, len);
|
|
return ref;
|
|
}
|
|
|
|
struct ref *alloc_ref(const char *name)
|
|
{
|
|
return alloc_ref_with_prefix("", 0, name);
|
|
}
|
|
|
|
struct ref *copy_ref(const struct ref *ref)
|
|
{
|
|
struct ref *cpy;
|
|
size_t len;
|
|
if (!ref)
|
|
return NULL;
|
|
len = strlen(ref->name);
|
|
cpy = xmalloc(sizeof(struct ref) + len + 1);
|
|
memcpy(cpy, ref, sizeof(struct ref) + len + 1);
|
|
cpy->next = NULL;
|
|
cpy->symref = ref->symref ? xstrdup(ref->symref) : NULL;
|
|
cpy->remote_status = ref->remote_status ? xstrdup(ref->remote_status) : NULL;
|
|
cpy->peer_ref = copy_ref(ref->peer_ref);
|
|
return cpy;
|
|
}
|
|
|
|
struct ref *copy_ref_list(const struct ref *ref)
|
|
{
|
|
struct ref *ret = NULL;
|
|
struct ref **tail = &ret;
|
|
while (ref) {
|
|
*tail = copy_ref(ref);
|
|
ref = ref->next;
|
|
tail = &((*tail)->next);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void free_ref(struct ref *ref)
|
|
{
|
|
if (!ref)
|
|
return;
|
|
free_ref(ref->peer_ref);
|
|
free(ref->remote_status);
|
|
free(ref->symref);
|
|
free(ref);
|
|
}
|
|
|
|
void free_refs(struct ref *ref)
|
|
{
|
|
struct ref *next;
|
|
while (ref) {
|
|
next = ref->next;
|
|
free_ref(ref);
|
|
ref = next;
|
|
}
|
|
}
|
|
|
|
int ref_compare_name(const void *va, const void *vb)
|
|
{
|
|
const struct ref *a = va, *b = vb;
|
|
return strcmp(a->name, b->name);
|
|
}
|
|
|
|
static void *ref_list_get_next(const void *a)
|
|
{
|
|
return ((const struct ref *)a)->next;
|
|
}
|
|
|
|
static void ref_list_set_next(void *a, void *next)
|
|
{
|
|
((struct ref *)a)->next = next;
|
|
}
|
|
|
|
void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *))
|
|
{
|
|
*l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp);
|
|
}
|
|
|
|
static int count_refspec_match(const char *pattern,
|
|
struct ref *refs,
|
|
struct ref **matched_ref)
|
|
{
|
|
int patlen = strlen(pattern);
|
|
struct ref *matched_weak = NULL;
|
|
struct ref *matched = NULL;
|
|
int weak_match = 0;
|
|
int match = 0;
|
|
|
|
for (weak_match = match = 0; refs; refs = refs->next) {
|
|
char *name = refs->name;
|
|
int namelen = strlen(name);
|
|
|
|
if (!refname_match(pattern, name, ref_rev_parse_rules))
|
|
continue;
|
|
|
|
/* A match is "weak" if it is with refs outside
|
|
* heads or tags, and did not specify the pattern
|
|
* in full (e.g. "refs/remotes/origin/master") or at
|
|
* least from the toplevel (e.g. "remotes/origin/master");
|
|
* otherwise "git push $URL master" would result in
|
|
* ambiguity between remotes/origin/master and heads/master
|
|
* at the remote site.
|
|
*/
|
|
if (namelen != patlen &&
|
|
patlen != namelen - 5 &&
|
|
prefixcmp(name, "refs/heads/") &&
|
|
prefixcmp(name, "refs/tags/")) {
|
|
/* We want to catch the case where only weak
|
|
* matches are found and there are multiple
|
|
* matches, and where more than one strong
|
|
* matches are found, as ambiguous. One
|
|
* strong match with zero or more weak matches
|
|
* are acceptable as a unique match.
|
|
*/
|
|
matched_weak = refs;
|
|
weak_match++;
|
|
}
|
|
else {
|
|
matched = refs;
|
|
match++;
|
|
}
|
|
}
|
|
if (!matched) {
|
|
*matched_ref = matched_weak;
|
|
return weak_match;
|
|
}
|
|
else {
|
|
*matched_ref = matched;
|
|
return match;
|
|
}
|
|
}
|
|
|
|
static void tail_link_ref(struct ref *ref, struct ref ***tail)
|
|
{
|
|
**tail = ref;
|
|
while (ref->next)
|
|
ref = ref->next;
|
|
*tail = &ref->next;
|
|
}
|
|
|
|
static struct ref *alloc_delete_ref(void)
|
|
{
|
|
struct ref *ref = alloc_ref("(delete)");
|
|
hashclr(ref->new_sha1);
|
|
return ref;
|
|
}
|
|
|
|
static struct ref *try_explicit_object_name(const char *name)
|
|
{
|
|
unsigned char sha1[20];
|
|
struct ref *ref;
|
|
|
|
if (!*name)
|
|
return alloc_delete_ref();
|
|
if (get_sha1(name, sha1))
|
|
return NULL;
|
|
ref = alloc_ref(name);
|
|
hashcpy(ref->new_sha1, sha1);
|
|
return ref;
|
|
}
|
|
|
|
static struct ref *make_linked_ref(const char *name, struct ref ***tail)
|
|
{
|
|
struct ref *ret = alloc_ref(name);
|
|
tail_link_ref(ret, tail);
|
|
return ret;
|
|
}
|
|
|
|
static char *guess_ref(const char *name, struct ref *peer)
|
|
{
|
|
struct strbuf buf = STRBUF_INIT;
|
|
unsigned char sha1[20];
|
|
|
|
const char *r = resolve_ref_unsafe(peer->name, sha1, 1, NULL);
|
|
if (!r)
|
|
return NULL;
|
|
|
|
if (!prefixcmp(r, "refs/heads/"))
|
|
strbuf_addstr(&buf, "refs/heads/");
|
|
else if (!prefixcmp(r, "refs/tags/"))
|
|
strbuf_addstr(&buf, "refs/tags/");
|
|
else
|
|
return NULL;
|
|
|
|
strbuf_addstr(&buf, name);
|
|
return strbuf_detach(&buf, NULL);
|
|
}
|
|
|
|
static int match_explicit(struct ref *src, struct ref *dst,
|
|
struct ref ***dst_tail,
|
|
struct refspec *rs)
|
|
{
|
|
struct ref *matched_src, *matched_dst;
|
|
int copy_src;
|
|
|
|
const char *dst_value = rs->dst;
|
|
char *dst_guess;
|
|
|
|
if (rs->pattern || rs->matching)
|
|
return 0;
|
|
|
|
matched_src = matched_dst = NULL;
|
|
switch (count_refspec_match(rs->src, src, &matched_src)) {
|
|
case 1:
|
|
copy_src = 1;
|
|
break;
|
|
case 0:
|
|
/* The source could be in the get_sha1() format
|
|
* not a reference name. :refs/other is a
|
|
* way to delete 'other' ref at the remote end.
|
|
*/
|
|
matched_src = try_explicit_object_name(rs->src);
|
|
if (!matched_src)
|
|
return error("src refspec %s does not match any.", rs->src);
|
|
copy_src = 0;
|
|
break;
|
|
default:
|
|
return error("src refspec %s matches more than one.", rs->src);
|
|
}
|
|
|
|
if (!dst_value) {
|
|
unsigned char sha1[20];
|
|
int flag;
|
|
|
|
dst_value = resolve_ref_unsafe(matched_src->name, sha1, 1, &flag);
|
|
if (!dst_value ||
|
|
((flag & REF_ISSYMREF) &&
|
|
prefixcmp(dst_value, "refs/heads/")))
|
|
die("%s cannot be resolved to branch.",
|
|
matched_src->name);
|
|
}
|
|
|
|
switch (count_refspec_match(dst_value, dst, &matched_dst)) {
|
|
case 1:
|
|
break;
|
|
case 0:
|
|
if (!memcmp(dst_value, "refs/", 5))
|
|
matched_dst = make_linked_ref(dst_value, dst_tail);
|
|
else if (is_null_sha1(matched_src->new_sha1))
|
|
error("unable to delete '%s': remote ref does not exist",
|
|
dst_value);
|
|
else if ((dst_guess = guess_ref(dst_value, matched_src)))
|
|
matched_dst = make_linked_ref(dst_guess, dst_tail);
|
|
else
|
|
error("unable to push to unqualified destination: %s\n"
|
|
"The destination refspec neither matches an "
|
|
"existing ref on the remote nor\n"
|
|
"begins with refs/, and we are unable to "
|
|
"guess a prefix based on the source ref.",
|
|
dst_value);
|
|
break;
|
|
default:
|
|
matched_dst = NULL;
|
|
error("dst refspec %s matches more than one.",
|
|
dst_value);
|
|
break;
|
|
}
|
|
if (!matched_dst)
|
|
return -1;
|
|
if (matched_dst->peer_ref)
|
|
return error("dst ref %s receives from more than one src.",
|
|
matched_dst->name);
|
|
else {
|
|
matched_dst->peer_ref = copy_src ? copy_ref(matched_src) : matched_src;
|
|
matched_dst->force = rs->force;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int match_explicit_refs(struct ref *src, struct ref *dst,
|
|
struct ref ***dst_tail, struct refspec *rs,
|
|
int rs_nr)
|
|
{
|
|
int i, errs;
|
|
for (i = errs = 0; i < rs_nr; i++)
|
|
errs += match_explicit(src, dst, dst_tail, &rs[i]);
|
|
return errs;
|
|
}
|
|
|
|
static char *get_ref_match(const struct refspec *rs, int rs_nr, const struct ref *ref,
|
|
int send_mirror, int direction, const struct refspec **ret_pat)
|
|
{
|
|
const struct refspec *pat;
|
|
char *name;
|
|
int i;
|
|
int matching_refs = -1;
|
|
for (i = 0; i < rs_nr; i++) {
|
|
if (rs[i].matching &&
|
|
(matching_refs == -1 || rs[i].force)) {
|
|
matching_refs = i;
|
|
continue;
|
|
}
|
|
|
|
if (rs[i].pattern) {
|
|
const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src;
|
|
int match;
|
|
if (direction == FROM_SRC)
|
|
match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name);
|
|
else
|
|
match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name);
|
|
if (match) {
|
|
matching_refs = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (matching_refs == -1)
|
|
return NULL;
|
|
|
|
pat = rs + matching_refs;
|
|
if (pat->matching) {
|
|
/*
|
|
* "matching refs"; traditionally we pushed everything
|
|
* including refs outside refs/heads/ hierarchy, but
|
|
* that does not make much sense these days.
|
|
*/
|
|
if (!send_mirror && prefixcmp(ref->name, "refs/heads/"))
|
|
return NULL;
|
|
name = xstrdup(ref->name);
|
|
}
|
|
if (ret_pat)
|
|
*ret_pat = pat;
|
|
return name;
|
|
}
|
|
|
|
static struct ref **tail_ref(struct ref **head)
|
|
{
|
|
struct ref **tail = head;
|
|
while (*tail)
|
|
tail = &((*tail)->next);
|
|
return tail;
|
|
}
|
|
|
|
struct tips {
|
|
struct commit **tip;
|
|
int nr, alloc;
|
|
};
|
|
|
|
static void add_to_tips(struct tips *tips, const unsigned char *sha1)
|
|
{
|
|
struct commit *commit;
|
|
|
|
if (is_null_sha1(sha1))
|
|
return;
|
|
commit = lookup_commit_reference_gently(sha1, 1);
|
|
if (!commit || (commit->object.flags & TMP_MARK))
|
|
return;
|
|
commit->object.flags |= TMP_MARK;
|
|
ALLOC_GROW(tips->tip, tips->nr + 1, tips->alloc);
|
|
tips->tip[tips->nr++] = commit;
|
|
}
|
|
|
|
static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***dst_tail)
|
|
{
|
|
struct string_list dst_tag = STRING_LIST_INIT_NODUP;
|
|
struct string_list src_tag = STRING_LIST_INIT_NODUP;
|
|
struct string_list_item *item;
|
|
struct ref *ref;
|
|
struct tips sent_tips;
|
|
|
|
/*
|
|
* Collect everything we know they would have at the end of
|
|
* this push, and collect all tags they have.
|
|
*/
|
|
memset(&sent_tips, 0, sizeof(sent_tips));
|
|
for (ref = *dst; ref; ref = ref->next) {
|
|
if (ref->peer_ref &&
|
|
!is_null_sha1(ref->peer_ref->new_sha1))
|
|
add_to_tips(&sent_tips, ref->peer_ref->new_sha1);
|
|
else
|
|
add_to_tips(&sent_tips, ref->old_sha1);
|
|
if (!prefixcmp(ref->name, "refs/tags/"))
|
|
string_list_append(&dst_tag, ref->name);
|
|
}
|
|
clear_commit_marks_many(sent_tips.nr, sent_tips.tip, TMP_MARK);
|
|
|
|
sort_string_list(&dst_tag);
|
|
|
|
/* Collect tags they do not have. */
|
|
for (ref = src; ref; ref = ref->next) {
|
|
if (prefixcmp(ref->name, "refs/tags/"))
|
|
continue; /* not a tag */
|
|
if (string_list_has_string(&dst_tag, ref->name))
|
|
continue; /* they already have it */
|
|
if (sha1_object_info(ref->new_sha1, NULL) != OBJ_TAG)
|
|
continue; /* be conservative */
|
|
item = string_list_append(&src_tag, ref->name);
|
|
item->util = ref;
|
|
}
|
|
string_list_clear(&dst_tag, 0);
|
|
|
|
/*
|
|
* At this point, src_tag lists tags that are missing from
|
|
* dst, and sent_tips lists the tips we are pushing or those
|
|
* that we know they already have. An element in the src_tag
|
|
* that is an ancestor of any of the sent_tips needs to be
|
|
* sent to the other side.
|
|
*/
|
|
if (sent_tips.nr) {
|
|
for_each_string_list_item(item, &src_tag) {
|
|
struct ref *ref = item->util;
|
|
struct ref *dst_ref;
|
|
struct commit *commit;
|
|
|
|
if (is_null_sha1(ref->new_sha1))
|
|
continue;
|
|
commit = lookup_commit_reference_gently(ref->new_sha1, 1);
|
|
if (!commit)
|
|
/* not pushing a commit, which is not an error */
|
|
continue;
|
|
|
|
/*
|
|
* Is this tag, which they do not have, reachable from
|
|
* any of the commits we are sending?
|
|
*/
|
|
if (!in_merge_bases_many(commit, sent_tips.nr, sent_tips.tip))
|
|
continue;
|
|
|
|
/* Add it in */
|
|
dst_ref = make_linked_ref(ref->name, dst_tail);
|
|
hashcpy(dst_ref->new_sha1, ref->new_sha1);
|
|
dst_ref->peer_ref = copy_ref(ref);
|
|
}
|
|
}
|
|
string_list_clear(&src_tag, 0);
|
|
free(sent_tips.tip);
|
|
}
|
|
|
|
struct ref *find_ref_by_name(const struct ref *list, const char *name)
|
|
{
|
|
for ( ; list; list = list->next)
|
|
if (!strcmp(list->name, name))
|
|
return (struct ref *)list;
|
|
return NULL;
|
|
}
|
|
|
|
static void prepare_ref_index(struct string_list *ref_index, struct ref *ref)
|
|
{
|
|
for ( ; ref; ref = ref->next)
|
|
string_list_append_nodup(ref_index, ref->name)->util = ref;
|
|
|
|
sort_string_list(ref_index);
|
|
}
|
|
|
|
/*
|
|
* Given the set of refs the local repository has, the set of refs the
|
|
* remote repository has, and the refspec used for push, determine
|
|
* what remote refs we will update and with what value by setting
|
|
* peer_ref (which object is being pushed) and force (if the push is
|
|
* forced) in elements of "dst". The function may add new elements to
|
|
* dst (e.g. pushing to a new branch, done in match_explicit_refs).
|
|
*/
|
|
int match_push_refs(struct ref *src, struct ref **dst,
|
|
int nr_refspec, const char **refspec, int flags)
|
|
{
|
|
struct refspec *rs;
|
|
int send_all = flags & MATCH_REFS_ALL;
|
|
int send_mirror = flags & MATCH_REFS_MIRROR;
|
|
int send_prune = flags & MATCH_REFS_PRUNE;
|
|
int errs;
|
|
static const char *default_refspec[] = { ":", NULL };
|
|
struct ref *ref, **dst_tail = tail_ref(dst);
|
|
struct string_list dst_ref_index = STRING_LIST_INIT_NODUP;
|
|
|
|
if (!nr_refspec) {
|
|
nr_refspec = 1;
|
|
refspec = default_refspec;
|
|
}
|
|
rs = parse_push_refspec(nr_refspec, (const char **) refspec);
|
|
errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
|
|
|
|
/* pick the remainder */
|
|
for (ref = src; ref; ref = ref->next) {
|
|
struct string_list_item *dst_item;
|
|
struct ref *dst_peer;
|
|
const struct refspec *pat = NULL;
|
|
char *dst_name;
|
|
|
|
dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat);
|
|
if (!dst_name)
|
|
continue;
|
|
|
|
if (!dst_ref_index.nr)
|
|
prepare_ref_index(&dst_ref_index, *dst);
|
|
|
|
dst_item = string_list_lookup(&dst_ref_index, dst_name);
|
|
dst_peer = dst_item ? dst_item->util : NULL;
|
|
if (dst_peer) {
|
|
if (dst_peer->peer_ref)
|
|
/* We're already sending something to this ref. */
|
|
goto free_name;
|
|
} else {
|
|
if (pat->matching && !(send_all || send_mirror))
|
|
/*
|
|
* Remote doesn't have it, and we have no
|
|
* explicit pattern, and we don't have
|
|
* --all nor --mirror.
|
|
*/
|
|
goto free_name;
|
|
|
|
/* Create a new one and link it */
|
|
dst_peer = make_linked_ref(dst_name, &dst_tail);
|
|
hashcpy(dst_peer->new_sha1, ref->new_sha1);
|
|
string_list_insert(&dst_ref_index,
|
|
dst_peer->name)->util = dst_peer;
|
|
}
|
|
dst_peer->peer_ref = copy_ref(ref);
|
|
dst_peer->force = pat->force;
|
|
free_name:
|
|
free(dst_name);
|
|
}
|
|
|
|
string_list_clear(&dst_ref_index, 0);
|
|
|
|
if (flags & MATCH_REFS_FOLLOW_TAGS)
|
|
add_missing_tags(src, dst, &dst_tail);
|
|
|
|
if (send_prune) {
|
|
struct string_list src_ref_index = STRING_LIST_INIT_NODUP;
|
|
/* check for missing refs on the remote */
|
|
for (ref = *dst; ref; ref = ref->next) {
|
|
char *src_name;
|
|
|
|
if (ref->peer_ref)
|
|
/* We're already sending something to this ref. */
|
|
continue;
|
|
|
|
src_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_DST, NULL);
|
|
if (src_name) {
|
|
if (!src_ref_index.nr)
|
|
prepare_ref_index(&src_ref_index, src);
|
|
if (!string_list_has_string(&src_ref_index,
|
|
src_name))
|
|
ref->peer_ref = alloc_delete_ref();
|
|
free(src_name);
|
|
}
|
|
}
|
|
string_list_clear(&src_ref_index, 0);
|
|
}
|
|
if (errs)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
|
|
int force_update)
|
|
{
|
|
struct ref *ref;
|
|
|
|
for (ref = remote_refs; ref; ref = ref->next) {
|
|
int force_ref_update = ref->force || force_update;
|
|
int reject_reason = 0;
|
|
|
|
if (ref->peer_ref)
|
|
hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
|
|
else if (!send_mirror)
|
|
continue;
|
|
|
|
ref->deletion = is_null_sha1(ref->new_sha1);
|
|
if (!ref->deletion &&
|
|
!hashcmp(ref->old_sha1, ref->new_sha1)) {
|
|
ref->status = REF_STATUS_UPTODATE;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Bypass the usual "must fast-forward" check but
|
|
* replace it with a weaker "the old value must be
|
|
* this value we observed". If the remote ref has
|
|
* moved and is now different from what we expect,
|
|
* reject any push.
|
|
*
|
|
* It also is an error if the user told us to check
|
|
* with the remote-tracking branch to find the value
|
|
* to expect, but we did not have such a tracking
|
|
* branch.
|
|
*/
|
|
if (ref->expect_old_sha1) {
|
|
if (ref->expect_old_no_trackback ||
|
|
hashcmp(ref->old_sha1, ref->old_sha1_expect))
|
|
reject_reason = REF_STATUS_REJECT_STALE;
|
|
}
|
|
|
|
/*
|
|
* The usual "must fast-forward" rules.
|
|
*
|
|
* Decide whether an individual refspec A:B can be
|
|
* pushed. The push will succeed if any of the
|
|
* following are true:
|
|
*
|
|
* (1) the remote reference B does not exist
|
|
*
|
|
* (2) the remote reference B is being removed (i.e.,
|
|
* pushing :B where no source is specified)
|
|
*
|
|
* (3) the destination is not under refs/tags/, and
|
|
* if the old and new value is a commit, the new
|
|
* is a descendant of the old.
|
|
*
|
|
* (4) it is forced using the +A:B notation, or by
|
|
* passing the --force argument
|
|
*/
|
|
|
|
else if (!ref->deletion && !is_null_sha1(ref->old_sha1)) {
|
|
if (!prefixcmp(ref->name, "refs/tags/"))
|
|
reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS;
|
|
else if (!has_sha1_file(ref->old_sha1))
|
|
reject_reason = REF_STATUS_REJECT_FETCH_FIRST;
|
|
else if (!lookup_commit_reference_gently(ref->old_sha1, 1) ||
|
|
!lookup_commit_reference_gently(ref->new_sha1, 1))
|
|
reject_reason = REF_STATUS_REJECT_NEEDS_FORCE;
|
|
else if (!ref_newer(ref->new_sha1, ref->old_sha1))
|
|
reject_reason = REF_STATUS_REJECT_NONFASTFORWARD;
|
|
}
|
|
|
|
/*
|
|
* "--force" will defeat any rejection implemented
|
|
* by the rules above.
|
|
*/
|
|
if (!force_ref_update)
|
|
ref->status = reject_reason;
|
|
else if (reject_reason)
|
|
ref->forced_update = 1;
|
|
}
|
|
}
|
|
|
|
struct branch *branch_get(const char *name)
|
|
{
|
|
struct branch *ret;
|
|
|
|
read_config();
|
|
if (!name || !*name || !strcmp(name, "HEAD"))
|
|
ret = current_branch;
|
|
else
|
|
ret = make_branch(name, 0);
|
|
if (ret && ret->remote_name) {
|
|
ret->remote = remote_get(ret->remote_name);
|
|
if (ret->merge_nr) {
|
|
int i;
|
|
ret->merge = xcalloc(ret->merge_nr, sizeof(*ret->merge));
|
|
for (i = 0; i < ret->merge_nr; i++) {
|
|
ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
|
|
ret->merge[i]->src = xstrdup(ret->merge_name[i]);
|
|
if (remote_find_tracking(ret->remote, ret->merge[i])
|
|
&& !strcmp(ret->remote_name, "."))
|
|
ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int branch_has_merge_config(struct branch *branch)
|
|
{
|
|
return branch && !!branch->merge;
|
|
}
|
|
|
|
int branch_merge_matches(struct branch *branch,
|
|
int i,
|
|
const char *refname)
|
|
{
|
|
if (!branch || i < 0 || i >= branch->merge_nr)
|
|
return 0;
|
|
return refname_match(branch->merge[i]->src, refname, ref_fetch_rules);
|
|
}
|
|
|
|
static int ignore_symref_update(const char *refname)
|
|
{
|
|
unsigned char sha1[20];
|
|
int flag;
|
|
|
|
if (!resolve_ref_unsafe(refname, sha1, 0, &flag))
|
|
return 0; /* non-existing refs are OK */
|
|
return (flag & REF_ISSYMREF);
|
|
}
|
|
|
|
static struct ref *get_expanded_map(const struct ref *remote_refs,
|
|
const struct refspec *refspec)
|
|
{
|
|
const struct ref *ref;
|
|
struct ref *ret = NULL;
|
|
struct ref **tail = &ret;
|
|
|
|
char *expn_name;
|
|
|
|
for (ref = remote_refs; ref; ref = ref->next) {
|
|
if (strchr(ref->name, '^'))
|
|
continue; /* a dereference item */
|
|
if (match_name_with_pattern(refspec->src, ref->name,
|
|
refspec->dst, &expn_name) &&
|
|
!ignore_symref_update(expn_name)) {
|
|
struct ref *cpy = copy_ref(ref);
|
|
|
|
cpy->peer_ref = alloc_ref(expn_name);
|
|
free(expn_name);
|
|
if (refspec->force)
|
|
cpy->peer_ref->force = 1;
|
|
*tail = cpy;
|
|
tail = &cpy->next;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
|
|
{
|
|
const struct ref *ref;
|
|
for (ref = refs; ref; ref = ref->next) {
|
|
if (refname_match(name, ref->name, ref_fetch_rules))
|
|
return ref;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
|
|
{
|
|
const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
|
|
|
|
if (!ref)
|
|
return NULL;
|
|
|
|
return copy_ref(ref);
|
|
}
|
|
|
|
static struct ref *get_local_ref(const char *name)
|
|
{
|
|
if (!name || name[0] == '\0')
|
|
return NULL;
|
|
|
|
if (!prefixcmp(name, "refs/"))
|
|
return alloc_ref(name);
|
|
|
|
if (!prefixcmp(name, "heads/") ||
|
|
!prefixcmp(name, "tags/") ||
|
|
!prefixcmp(name, "remotes/"))
|
|
return alloc_ref_with_prefix("refs/", 5, name);
|
|
|
|
return alloc_ref_with_prefix("refs/heads/", 11, name);
|
|
}
|
|
|
|
int get_fetch_map(const struct ref *remote_refs,
|
|
const struct refspec *refspec,
|
|
struct ref ***tail,
|
|
int missing_ok)
|
|
{
|
|
struct ref *ref_map, **rmp;
|
|
|
|
if (refspec->pattern) {
|
|
ref_map = get_expanded_map(remote_refs, refspec);
|
|
} else {
|
|
const char *name = refspec->src[0] ? refspec->src : "HEAD";
|
|
|
|
if (refspec->exact_sha1) {
|
|
ref_map = alloc_ref(name);
|
|
get_sha1_hex(name, ref_map->old_sha1);
|
|
} else {
|
|
ref_map = get_remote_ref(remote_refs, name);
|
|
}
|
|
if (!missing_ok && !ref_map)
|
|
die("Couldn't find remote ref %s", name);
|
|
if (ref_map) {
|
|
ref_map->peer_ref = get_local_ref(refspec->dst);
|
|
if (ref_map->peer_ref && refspec->force)
|
|
ref_map->peer_ref->force = 1;
|
|
}
|
|
}
|
|
|
|
for (rmp = &ref_map; *rmp; ) {
|
|
if ((*rmp)->peer_ref) {
|
|
if (prefixcmp((*rmp)->peer_ref->name, "refs/") ||
|
|
check_refname_format((*rmp)->peer_ref->name, 0)) {
|
|
struct ref *ignore = *rmp;
|
|
error("* Ignoring funny ref '%s' locally",
|
|
(*rmp)->peer_ref->name);
|
|
*rmp = (*rmp)->next;
|
|
free(ignore->peer_ref);
|
|
free(ignore);
|
|
continue;
|
|
}
|
|
}
|
|
rmp = &((*rmp)->next);
|
|
}
|
|
|
|
if (ref_map)
|
|
tail_link_ref(ref_map, tail);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int resolve_remote_symref(struct ref *ref, struct ref *list)
|
|
{
|
|
if (!ref->symref)
|
|
return 0;
|
|
for (; list; list = list->next)
|
|
if (!strcmp(ref->symref, list->name)) {
|
|
hashcpy(ref->old_sha1, list->old_sha1);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void unmark_and_free(struct commit_list *list, unsigned int mark)
|
|
{
|
|
while (list) {
|
|
struct commit_list *temp = list;
|
|
temp->item->object.flags &= ~mark;
|
|
list = temp->next;
|
|
free(temp);
|
|
}
|
|
}
|
|
|
|
int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1)
|
|
{
|
|
struct object *o;
|
|
struct commit *old, *new;
|
|
struct commit_list *list, *used;
|
|
int found = 0;
|
|
|
|
/*
|
|
* Both new and old must be commit-ish and new is descendant of
|
|
* old. Otherwise we require --force.
|
|
*/
|
|
o = deref_tag(parse_object(old_sha1), NULL, 0);
|
|
if (!o || o->type != OBJ_COMMIT)
|
|
return 0;
|
|
old = (struct commit *) o;
|
|
|
|
o = deref_tag(parse_object(new_sha1), NULL, 0);
|
|
if (!o || o->type != OBJ_COMMIT)
|
|
return 0;
|
|
new = (struct commit *) o;
|
|
|
|
if (parse_commit(new) < 0)
|
|
return 0;
|
|
|
|
used = list = NULL;
|
|
commit_list_insert(new, &list);
|
|
while (list) {
|
|
new = pop_most_recent_commit(&list, TMP_MARK);
|
|
commit_list_insert(new, &used);
|
|
if (new == old) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
unmark_and_free(list, TMP_MARK);
|
|
unmark_and_free(used, TMP_MARK);
|
|
return found;
|
|
}
|
|
|
|
/*
|
|
* Return true if there is anything to report, otherwise false.
|
|
*/
|
|
int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs)
|
|
{
|
|
unsigned char sha1[20];
|
|
struct commit *ours, *theirs;
|
|
char symmetric[84];
|
|
struct rev_info revs;
|
|
const char *rev_argv[10], *base;
|
|
int rev_argc;
|
|
|
|
/*
|
|
* Nothing to report unless we are marked to build on top of
|
|
* somebody else.
|
|
*/
|
|
if (!branch ||
|
|
!branch->merge || !branch->merge[0] || !branch->merge[0]->dst)
|
|
return 0;
|
|
|
|
/*
|
|
* If what we used to build on no longer exists, there is
|
|
* nothing to report.
|
|
*/
|
|
base = branch->merge[0]->dst;
|
|
if (read_ref(base, sha1))
|
|
return 0;
|
|
theirs = lookup_commit_reference(sha1);
|
|
if (!theirs)
|
|
return 0;
|
|
|
|
if (read_ref(branch->refname, sha1))
|
|
return 0;
|
|
ours = lookup_commit_reference(sha1);
|
|
if (!ours)
|
|
return 0;
|
|
|
|
/* are we the same? */
|
|
if (theirs == ours)
|
|
return 0;
|
|
|
|
/* Run "rev-list --left-right ours...theirs" internally... */
|
|
rev_argc = 0;
|
|
rev_argv[rev_argc++] = NULL;
|
|
rev_argv[rev_argc++] = "--left-right";
|
|
rev_argv[rev_argc++] = symmetric;
|
|
rev_argv[rev_argc++] = "--";
|
|
rev_argv[rev_argc] = NULL;
|
|
|
|
strcpy(symmetric, sha1_to_hex(ours->object.sha1));
|
|
strcpy(symmetric + 40, "...");
|
|
strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1));
|
|
|
|
init_revisions(&revs, NULL);
|
|
setup_revisions(rev_argc, rev_argv, &revs, NULL);
|
|
prepare_revision_walk(&revs);
|
|
|
|
/* ... and count the commits on each side. */
|
|
*num_ours = 0;
|
|
*num_theirs = 0;
|
|
while (1) {
|
|
struct commit *c = get_revision(&revs);
|
|
if (!c)
|
|
break;
|
|
if (c->object.flags & SYMMETRIC_LEFT)
|
|
(*num_ours)++;
|
|
else
|
|
(*num_theirs)++;
|
|
}
|
|
|
|
/* clear object flags smudged by the above traversal */
|
|
clear_commit_marks(ours, ALL_REV_FLAGS);
|
|
clear_commit_marks(theirs, ALL_REV_FLAGS);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Return true when there is anything to report, otherwise false.
|
|
*/
|
|
int format_tracking_info(struct branch *branch, struct strbuf *sb)
|
|
{
|
|
int num_ours, num_theirs;
|
|
const char *base;
|
|
|
|
if (!stat_tracking_info(branch, &num_ours, &num_theirs))
|
|
return 0;
|
|
|
|
base = branch->merge[0]->dst;
|
|
base = shorten_unambiguous_ref(base, 0);
|
|
if (!num_theirs) {
|
|
strbuf_addf(sb,
|
|
Q_("Your branch is ahead of '%s' by %d commit.\n",
|
|
"Your branch is ahead of '%s' by %d commits.\n",
|
|
num_ours),
|
|
base, num_ours);
|
|
if (advice_status_hints)
|
|
strbuf_addf(sb,
|
|
_(" (use \"git push\" to publish your local commits)\n"));
|
|
} else if (!num_ours) {
|
|
strbuf_addf(sb,
|
|
Q_("Your branch is behind '%s' by %d commit, "
|
|
"and can be fast-forwarded.\n",
|
|
"Your branch is behind '%s' by %d commits, "
|
|
"and can be fast-forwarded.\n",
|
|
num_theirs),
|
|
base, num_theirs);
|
|
if (advice_status_hints)
|
|
strbuf_addf(sb,
|
|
_(" (use \"git pull\" to update your local branch)\n"));
|
|
} else {
|
|
strbuf_addf(sb,
|
|
Q_("Your branch and '%s' have diverged,\n"
|
|
"and have %d and %d different commit each, "
|
|
"respectively.\n",
|
|
"Your branch and '%s' have diverged,\n"
|
|
"and have %d and %d different commits each, "
|
|
"respectively.\n",
|
|
num_theirs),
|
|
base, num_ours, num_theirs);
|
|
if (advice_status_hints)
|
|
strbuf_addf(sb,
|
|
_(" (use \"git pull\" to merge the remote branch into yours)\n"));
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
|
|
{
|
|
struct ref ***local_tail = cb_data;
|
|
struct ref *ref;
|
|
int len;
|
|
|
|
/* we already know it starts with refs/ to get here */
|
|
if (check_refname_format(refname + 5, 0))
|
|
return 0;
|
|
|
|
len = strlen(refname) + 1;
|
|
ref = xcalloc(1, sizeof(*ref) + len);
|
|
hashcpy(ref->new_sha1, sha1);
|
|
memcpy(ref->name, refname, len);
|
|
**local_tail = ref;
|
|
*local_tail = &ref->next;
|
|
return 0;
|
|
}
|
|
|
|
struct ref *get_local_heads(void)
|
|
{
|
|
struct ref *local_refs = NULL, **local_tail = &local_refs;
|
|
for_each_ref(one_local_ref, &local_tail);
|
|
return local_refs;
|
|
}
|
|
|
|
struct ref *guess_remote_head(const struct ref *head,
|
|
const struct ref *refs,
|
|
int all)
|
|
{
|
|
const struct ref *r;
|
|
struct ref *list = NULL;
|
|
struct ref **tail = &list;
|
|
|
|
if (!head)
|
|
return NULL;
|
|
|
|
/*
|
|
* Some transports support directly peeking at
|
|
* where HEAD points; if that is the case, then
|
|
* we don't have to guess.
|
|
*/
|
|
if (head->symref)
|
|
return copy_ref(find_ref_by_name(refs, head->symref));
|
|
|
|
/* If refs/heads/master could be right, it is. */
|
|
if (!all) {
|
|
r = find_ref_by_name(refs, "refs/heads/master");
|
|
if (r && !hashcmp(r->old_sha1, head->old_sha1))
|
|
return copy_ref(r);
|
|
}
|
|
|
|
/* Look for another ref that points there */
|
|
for (r = refs; r; r = r->next) {
|
|
if (r != head &&
|
|
!prefixcmp(r->name, "refs/heads/") &&
|
|
!hashcmp(r->old_sha1, head->old_sha1)) {
|
|
*tail = copy_ref(r);
|
|
tail = &((*tail)->next);
|
|
if (!all)
|
|
break;
|
|
}
|
|
}
|
|
|
|
return list;
|
|
}
|
|
|
|
struct stale_heads_info {
|
|
struct string_list *ref_names;
|
|
struct ref **stale_refs_tail;
|
|
struct refspec *refs;
|
|
int ref_count;
|
|
};
|
|
|
|
static int get_stale_heads_cb(const char *refname,
|
|
const unsigned char *sha1, int flags, void *cb_data)
|
|
{
|
|
struct stale_heads_info *info = cb_data;
|
|
struct refspec query;
|
|
memset(&query, 0, sizeof(struct refspec));
|
|
query.dst = (char *)refname;
|
|
|
|
if (query_refspecs(info->refs, info->ref_count, &query))
|
|
return 0; /* No matches */
|
|
|
|
/*
|
|
* If we did find a suitable refspec and it's not a symref and
|
|
* it's not in the list of refs that currently exist in that
|
|
* remote we consider it to be stale.
|
|
*/
|
|
if (!((flags & REF_ISSYMREF) ||
|
|
string_list_has_string(info->ref_names, query.src))) {
|
|
struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
|
|
hashcpy(ref->new_sha1, sha1);
|
|
}
|
|
|
|
free(query.src);
|
|
return 0;
|
|
}
|
|
|
|
struct ref *get_stale_heads(struct refspec *refs, int ref_count, struct ref *fetch_map)
|
|
{
|
|
struct ref *ref, *stale_refs = NULL;
|
|
struct string_list ref_names = STRING_LIST_INIT_NODUP;
|
|
struct stale_heads_info info;
|
|
info.ref_names = &ref_names;
|
|
info.stale_refs_tail = &stale_refs;
|
|
info.refs = refs;
|
|
info.ref_count = ref_count;
|
|
for (ref = fetch_map; ref; ref = ref->next)
|
|
string_list_append(&ref_names, ref->name);
|
|
sort_string_list(&ref_names);
|
|
for_each_ref(get_stale_heads_cb, &info);
|
|
string_list_clear(&ref_names, 0);
|
|
return stale_refs;
|
|
}
|
|
|
|
/*
|
|
* Compare-and-swap
|
|
*/
|
|
void clear_cas_option(struct push_cas_option *cas)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < cas->nr; i++)
|
|
free(cas->entry[i].refname);
|
|
free(cas->entry);
|
|
memset(cas, 0, sizeof(*cas));
|
|
}
|
|
|
|
static struct push_cas *add_cas_entry(struct push_cas_option *cas,
|
|
const char *refname,
|
|
size_t refnamelen)
|
|
{
|
|
struct push_cas *entry;
|
|
ALLOC_GROW(cas->entry, cas->nr + 1, cas->alloc);
|
|
entry = &cas->entry[cas->nr++];
|
|
memset(entry, 0, sizeof(*entry));
|
|
entry->refname = xmemdupz(refname, refnamelen);
|
|
return entry;
|
|
}
|
|
|
|
int parse_push_cas_option(struct push_cas_option *cas, const char *arg, int unset)
|
|
{
|
|
const char *colon;
|
|
struct push_cas *entry;
|
|
|
|
if (unset) {
|
|
/* "--no-<option>" */
|
|
clear_cas_option(cas);
|
|
return 0;
|
|
}
|
|
|
|
if (!arg) {
|
|
/* just "--<option>" */
|
|
cas->use_tracking_for_rest = 1;
|
|
return 0;
|
|
}
|
|
|
|
/* "--<option>=refname" or "--<option>=refname:value" */
|
|
colon = strchrnul(arg, ':');
|
|
entry = add_cas_entry(cas, arg, colon - arg);
|
|
if (!*colon)
|
|
entry->use_tracking = 1;
|
|
else if (get_sha1(colon + 1, entry->expect))
|
|
return error("cannot parse expected object name '%s'", colon + 1);
|
|
return 0;
|
|
}
|
|
|
|
int parseopt_push_cas_option(const struct option *opt, const char *arg, int unset)
|
|
{
|
|
return parse_push_cas_option(opt->value, arg, unset);
|
|
}
|
|
|
|
int is_empty_cas(const struct push_cas_option *cas)
|
|
{
|
|
return !cas->use_tracking_for_rest && !cas->nr;
|
|
}
|
|
|
|
/*
|
|
* Look at remote.fetch refspec and see if we have a remote
|
|
* tracking branch for the refname there. Fill its current
|
|
* value in sha1[].
|
|
* If we cannot do so, return negative to signal an error.
|
|
*/
|
|
static int remote_tracking(struct remote *remote, const char *refname,
|
|
unsigned char sha1[20])
|
|
{
|
|
char *dst;
|
|
|
|
dst = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname);
|
|
if (!dst)
|
|
return -1; /* no tracking ref for refname at remote */
|
|
if (read_ref(dst, sha1))
|
|
return -1; /* we know what the tracking ref is but we cannot read it */
|
|
return 0;
|
|
}
|
|
|
|
static void apply_cas(struct push_cas_option *cas,
|
|
struct remote *remote,
|
|
struct ref *ref)
|
|
{
|
|
int i;
|
|
|
|
/* Find an explicit --<option>=<name>[:<value>] entry */
|
|
for (i = 0; i < cas->nr; i++) {
|
|
struct push_cas *entry = &cas->entry[i];
|
|
if (!refname_match(entry->refname, ref->name, ref_rev_parse_rules))
|
|
continue;
|
|
ref->expect_old_sha1 = 1;
|
|
if (!entry->use_tracking)
|
|
hashcpy(ref->old_sha1_expect, cas->entry[i].expect);
|
|
else if (remote_tracking(remote, ref->name, ref->old_sha1_expect))
|
|
ref->expect_old_no_trackback = 1;
|
|
return;
|
|
}
|
|
|
|
/* Are we using "--<option>" to cover all? */
|
|
if (!cas->use_tracking_for_rest)
|
|
return;
|
|
|
|
ref->expect_old_sha1 = 1;
|
|
if (remote_tracking(remote, ref->name, ref->old_sha1_expect))
|
|
ref->expect_old_no_trackback = 1;
|
|
}
|
|
|
|
void apply_push_cas(struct push_cas_option *cas,
|
|
struct remote *remote,
|
|
struct ref *remote_refs)
|
|
{
|
|
struct ref *ref;
|
|
for (ref = remote_refs; ref; ref = ref->next)
|
|
apply_cas(cas, remote, ref);
|
|
}
|