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![Shawn Pearce](/assets/img/avatar_default.png)
Like xmalloc and xrealloc xstrdup dies with a useful message if the native strdup() implementation returns NULL rather than a valid pointer. I just tried to use xstrdup in new code and found it to be missing. However I expected it to be present as xmalloc and xrealloc are already commonly used throughout the code. [jc: removed the part that deals with last_XXX, which I am finding more and more dubious these days.] Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
313 lines
6.3 KiB
C
313 lines
6.3 KiB
C
/*
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* "git push"
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*/
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#include "cache.h"
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#include "refs.h"
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#include "run-command.h"
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#include "builtin.h"
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#define MAX_URI (16)
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static const char push_usage[] = "git-push [--all] [--tags] [-f | --force] <repository> [<refspec>...]";
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static int all, tags, force, thin = 1;
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static const char *execute;
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#define BUF_SIZE (2084)
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static char buffer[BUF_SIZE];
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static const char **refspec;
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static int refspec_nr;
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static void add_refspec(const char *ref)
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{
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int nr = refspec_nr + 1;
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refspec = xrealloc(refspec, nr * sizeof(char *));
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refspec[nr-1] = ref;
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refspec_nr = nr;
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}
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static int expand_one_ref(const char *ref, const unsigned char *sha1)
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{
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/* Ignore the "refs/" at the beginning of the refname */
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ref += 5;
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if (!strncmp(ref, "tags/", 5))
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add_refspec(xstrdup(ref));
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return 0;
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}
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static void expand_refspecs(void)
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{
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if (all) {
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if (refspec_nr)
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die("cannot mix '--all' and a refspec");
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/*
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* No need to expand "--all" - we'll just use
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* the "--all" flag to send-pack
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*/
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return;
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}
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if (!tags)
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return;
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for_each_ref(expand_one_ref);
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}
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static void set_refspecs(const char **refs, int nr)
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{
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if (nr) {
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size_t bytes = nr * sizeof(char *);
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refspec = xrealloc(refspec, bytes);
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memcpy(refspec, refs, bytes);
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refspec_nr = nr;
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}
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expand_refspecs();
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}
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static int get_remotes_uri(const char *repo, const char *uri[MAX_URI])
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{
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int n = 0;
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FILE *f = fopen(git_path("remotes/%s", repo), "r");
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int has_explicit_refspec = refspec_nr || all || tags;
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if (!f)
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return -1;
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while (fgets(buffer, BUF_SIZE, f)) {
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int is_refspec;
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char *s, *p;
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if (!strncmp("URL: ", buffer, 5)) {
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is_refspec = 0;
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s = buffer + 5;
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} else if (!strncmp("Push: ", buffer, 6)) {
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is_refspec = 1;
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s = buffer + 6;
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} else
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continue;
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/* Remove whitespace at the head.. */
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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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/* ..and at the end */
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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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if (!is_refspec) {
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if (n < MAX_URI)
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uri[n++] = xstrdup(s);
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else
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error("more than %d URL's specified, ignoring the rest", MAX_URI);
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}
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else if (is_refspec && !has_explicit_refspec)
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add_refspec(xstrdup(s));
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}
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fclose(f);
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if (!n)
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die("remote '%s' has no URL", repo);
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return n;
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}
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static const char **config_uri;
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static const char *config_repo;
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static int config_repo_len;
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static int config_current_uri;
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static int config_get_refspecs;
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static int get_remote_config(const char* key, const char* value)
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{
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if (!strncmp(key, "remote.", 7) &&
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!strncmp(key + 7, config_repo, config_repo_len)) {
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if (!strcmp(key + 7 + config_repo_len, ".url")) {
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if (config_current_uri < MAX_URI)
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config_uri[config_current_uri++] = xstrdup(value);
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else
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error("more than %d URL's specified, ignoring the rest", MAX_URI);
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}
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else if (config_get_refspecs &&
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!strcmp(key + 7 + config_repo_len, ".push"))
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add_refspec(xstrdup(value));
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}
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return 0;
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}
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static int get_config_remotes_uri(const char *repo, const char *uri[MAX_URI])
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{
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config_repo_len = strlen(repo);
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config_repo = repo;
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config_current_uri = 0;
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config_uri = uri;
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config_get_refspecs = !(refspec_nr || all || tags);
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git_config(get_remote_config);
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return config_current_uri;
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}
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static int get_branches_uri(const char *repo, const char *uri[MAX_URI])
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{
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const char *slash = strchr(repo, '/');
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int n = slash ? slash - repo : 1000;
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FILE *f = fopen(git_path("branches/%.*s", n, repo), "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 0;
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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 0;
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while (isspace(*s))
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s++;
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if (!*s)
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return 0;
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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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if (slash)
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len += strlen(slash);
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p = xmalloc(len + 1);
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strcpy(p, s);
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if (slash)
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strcat(p, slash);
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uri[0] = p;
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return 1;
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}
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/*
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* Read remotes and branches file, fill the push target URI
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* list. If there is no command line refspecs, read Push: lines
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* to set up the *refspec list as well.
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* return the number of push target URIs
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*/
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static int read_config(const char *repo, const char *uri[MAX_URI])
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{
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int n;
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if (*repo != '/') {
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n = get_remotes_uri(repo, uri);
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if (n > 0)
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return n;
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n = get_config_remotes_uri(repo, uri);
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if (n > 0)
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return n;
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n = get_branches_uri(repo, uri);
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if (n > 0)
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return n;
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}
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uri[0] = repo;
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return 1;
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}
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static int do_push(const char *repo)
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{
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const char *uri[MAX_URI];
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int i, n;
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int common_argc;
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const char **argv;
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int argc;
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n = read_config(repo, uri);
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if (n <= 0)
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die("bad repository '%s'", repo);
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argv = xmalloc((refspec_nr + 10) * sizeof(char *));
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argv[0] = "dummy-send-pack";
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argc = 1;
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if (all)
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argv[argc++] = "--all";
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if (force)
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argv[argc++] = "--force";
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if (execute)
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argv[argc++] = execute;
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common_argc = argc;
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for (i = 0; i < n; i++) {
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int err;
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int dest_argc = common_argc;
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int dest_refspec_nr = refspec_nr;
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const char **dest_refspec = refspec;
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const char *dest = uri[i];
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const char *sender = "git-send-pack";
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if (!strncmp(dest, "http://", 7) ||
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!strncmp(dest, "https://", 8))
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sender = "git-http-push";
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else if (thin)
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argv[dest_argc++] = "--thin";
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argv[0] = sender;
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argv[dest_argc++] = dest;
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while (dest_refspec_nr--)
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argv[dest_argc++] = *dest_refspec++;
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argv[dest_argc] = NULL;
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err = run_command_v(argc, argv);
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if (!err)
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continue;
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switch (err) {
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case -ERR_RUN_COMMAND_FORK:
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die("unable to fork for %s", sender);
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case -ERR_RUN_COMMAND_EXEC:
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die("unable to exec %s", sender);
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case -ERR_RUN_COMMAND_WAITPID:
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case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
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case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
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case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
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die("%s died with strange error", sender);
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default:
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return -err;
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}
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}
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return 0;
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}
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int cmd_push(int argc, const char **argv, const char *prefix)
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{
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int i;
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const char *repo = "origin"; /* default repository */
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for (i = 1; i < argc; i++) {
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const char *arg = argv[i];
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if (arg[0] != '-') {
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repo = arg;
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i++;
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break;
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}
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if (!strcmp(arg, "--all")) {
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all = 1;
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continue;
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}
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if (!strcmp(arg, "--tags")) {
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tags = 1;
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continue;
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}
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if (!strcmp(arg, "--force") || !strcmp(arg, "-f")) {
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force = 1;
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continue;
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}
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if (!strcmp(arg, "--thin")) {
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thin = 1;
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continue;
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}
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if (!strcmp(arg, "--no-thin")) {
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thin = 0;
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continue;
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}
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if (!strncmp(arg, "--exec=", 7)) {
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execute = arg;
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continue;
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}
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usage(push_usage);
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}
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set_refspecs(argv + i, argc - i);
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return do_push(repo);
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}
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