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https://github.com/git/git
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43f46d6da5
Code cleanup. * es/worktree-code-cleanup: worktree: avoid dead-code in conditional
585 lines
14 KiB
C
585 lines
14 KiB
C
#include "cache.h"
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#include "repository.h"
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#include "refs.h"
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#include "strbuf.h"
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#include "worktree.h"
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#include "dir.h"
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#include "wt-status.h"
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void free_worktrees(struct worktree **worktrees)
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{
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int i = 0;
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for (i = 0; worktrees[i]; i++) {
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free(worktrees[i]->path);
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free(worktrees[i]->id);
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free(worktrees[i]->head_ref);
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free(worktrees[i]->lock_reason);
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free(worktrees[i]);
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}
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free (worktrees);
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}
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/**
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* Update head_sha1, head_ref and is_detached of the given worktree
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*/
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static void add_head_info(struct worktree *wt)
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{
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int flags;
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const char *target;
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target = refs_resolve_ref_unsafe(get_worktree_ref_store(wt),
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"HEAD",
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0,
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&wt->head_oid, &flags);
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if (!target)
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return;
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if (flags & REF_ISSYMREF)
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wt->head_ref = xstrdup(target);
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else
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wt->is_detached = 1;
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}
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/**
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* get the main worktree
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*/
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static struct worktree *get_main_worktree(void)
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{
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struct worktree *worktree = NULL;
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struct strbuf worktree_path = STRBUF_INIT;
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strbuf_add_absolute_path(&worktree_path, get_git_common_dir());
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if (!strbuf_strip_suffix(&worktree_path, "/.git/.") && /* in .git */
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!strbuf_strip_suffix(&worktree_path, "/.git")) /* in worktree */
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strbuf_strip_suffix(&worktree_path, "/."); /* in bare repo */
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worktree = xcalloc(1, sizeof(*worktree));
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worktree->path = strbuf_detach(&worktree_path, NULL);
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/*
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* NEEDSWORK: If this function is called from a secondary worktree and
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* config.worktree is present, is_bare_repository_cfg will reflect the
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* contents of config.worktree, not the contents of the main worktree.
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* This means that worktree->is_bare may be set to 0 even if the main
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* worktree is configured to be bare.
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*/
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worktree->is_bare = (is_bare_repository_cfg == 1) ||
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is_bare_repository();
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add_head_info(worktree);
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strbuf_release(&worktree_path);
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return worktree;
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}
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static struct worktree *get_linked_worktree(const char *id)
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{
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struct worktree *worktree = NULL;
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struct strbuf path = STRBUF_INIT;
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struct strbuf worktree_path = STRBUF_INIT;
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if (!id)
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die("Missing linked worktree name");
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strbuf_git_common_path(&path, the_repository, "worktrees/%s/gitdir", id);
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if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0)
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/* invalid gitdir file */
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goto done;
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strbuf_rtrim(&worktree_path);
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if (!strbuf_strip_suffix(&worktree_path, "/.git")) {
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strbuf_reset(&worktree_path);
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strbuf_add_absolute_path(&worktree_path, ".");
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strbuf_strip_suffix(&worktree_path, "/.");
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}
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strbuf_reset(&path);
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strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id);
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worktree = xcalloc(1, sizeof(*worktree));
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worktree->path = strbuf_detach(&worktree_path, NULL);
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worktree->id = xstrdup(id);
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add_head_info(worktree);
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done:
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strbuf_release(&path);
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strbuf_release(&worktree_path);
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return worktree;
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}
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static void mark_current_worktree(struct worktree **worktrees)
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{
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char *git_dir = absolute_pathdup(get_git_dir());
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int i;
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for (i = 0; worktrees[i]; i++) {
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struct worktree *wt = worktrees[i];
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const char *wt_git_dir = get_worktree_git_dir(wt);
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if (!fspathcmp(git_dir, absolute_path(wt_git_dir))) {
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wt->is_current = 1;
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break;
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}
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}
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free(git_dir);
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}
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struct worktree **get_worktrees(void)
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{
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struct worktree **list = NULL;
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struct strbuf path = STRBUF_INIT;
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DIR *dir;
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struct dirent *d;
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int counter = 0, alloc = 2;
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ALLOC_ARRAY(list, alloc);
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list[counter++] = get_main_worktree();
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strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
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dir = opendir(path.buf);
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strbuf_release(&path);
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if (dir) {
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while ((d = readdir(dir)) != NULL) {
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struct worktree *linked = NULL;
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if (is_dot_or_dotdot(d->d_name))
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continue;
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if ((linked = get_linked_worktree(d->d_name))) {
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ALLOC_GROW(list, counter + 1, alloc);
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list[counter++] = linked;
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}
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}
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closedir(dir);
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}
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ALLOC_GROW(list, counter + 1, alloc);
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list[counter] = NULL;
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mark_current_worktree(list);
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return list;
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}
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const char *get_worktree_git_dir(const struct worktree *wt)
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{
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if (!wt)
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return get_git_dir();
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else if (!wt->id)
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return get_git_common_dir();
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else
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return git_common_path("worktrees/%s", wt->id);
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}
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static struct worktree *find_worktree_by_suffix(struct worktree **list,
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const char *suffix)
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{
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struct worktree *found = NULL;
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int nr_found = 0, suffixlen;
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suffixlen = strlen(suffix);
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if (!suffixlen)
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return NULL;
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for (; *list && nr_found < 2; list++) {
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const char *path = (*list)->path;
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int pathlen = strlen(path);
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int start = pathlen - suffixlen;
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/* suffix must start at directory boundary */
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if ((!start || (start > 0 && is_dir_sep(path[start - 1]))) &&
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!fspathcmp(suffix, path + start)) {
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found = *list;
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nr_found++;
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}
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}
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return nr_found == 1 ? found : NULL;
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}
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struct worktree *find_worktree(struct worktree **list,
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const char *prefix,
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const char *arg)
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{
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struct worktree *wt;
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char *to_free = NULL;
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if ((wt = find_worktree_by_suffix(list, arg)))
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return wt;
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if (prefix)
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arg = to_free = prefix_filename(prefix, arg);
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wt = find_worktree_by_path(list, arg);
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free(to_free);
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return wt;
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}
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struct worktree *find_worktree_by_path(struct worktree **list, const char *p)
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{
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struct strbuf wt_path = STRBUF_INIT;
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char *path = real_pathdup(p, 0);
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if (!path)
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return NULL;
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for (; *list; list++) {
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if (!strbuf_realpath(&wt_path, (*list)->path, 0))
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continue;
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if (!fspathcmp(path, wt_path.buf))
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break;
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}
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free(path);
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strbuf_release(&wt_path);
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return *list;
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}
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int is_main_worktree(const struct worktree *wt)
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{
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return !wt->id;
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}
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const char *worktree_lock_reason(struct worktree *wt)
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{
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assert(!is_main_worktree(wt));
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if (!wt->lock_reason_valid) {
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struct strbuf path = STRBUF_INIT;
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strbuf_addstr(&path, worktree_git_path(wt, "locked"));
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if (file_exists(path.buf)) {
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struct strbuf lock_reason = STRBUF_INIT;
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if (strbuf_read_file(&lock_reason, path.buf, 0) < 0)
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die_errno(_("failed to read '%s'"), path.buf);
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strbuf_trim(&lock_reason);
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wt->lock_reason = strbuf_detach(&lock_reason, NULL);
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} else
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wt->lock_reason = NULL;
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wt->lock_reason_valid = 1;
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strbuf_release(&path);
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}
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return wt->lock_reason;
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}
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/* convenient wrapper to deal with NULL strbuf */
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static void strbuf_addf_gently(struct strbuf *buf, const char *fmt, ...)
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{
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va_list params;
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if (!buf)
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return;
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va_start(params, fmt);
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strbuf_vaddf(buf, fmt, params);
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va_end(params);
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}
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int validate_worktree(const struct worktree *wt, struct strbuf *errmsg,
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unsigned flags)
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{
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struct strbuf wt_path = STRBUF_INIT;
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struct strbuf realpath = STRBUF_INIT;
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char *path = NULL;
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int err, ret = -1;
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strbuf_addf(&wt_path, "%s/.git", wt->path);
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if (is_main_worktree(wt)) {
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if (is_directory(wt_path.buf)) {
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ret = 0;
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goto done;
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}
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/*
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* Main worktree using .git file to point to the
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* repository would make it impossible to know where
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* the actual worktree is if this function is executed
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* from another worktree. No .git file support for now.
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*/
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strbuf_addf_gently(errmsg,
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_("'%s' at main working tree is not the repository directory"),
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wt_path.buf);
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goto done;
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}
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/*
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* Make sure "gitdir" file points to a real .git file and that
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* file points back here.
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*/
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if (!is_absolute_path(wt->path)) {
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strbuf_addf_gently(errmsg,
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_("'%s' file does not contain absolute path to the working tree location"),
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git_common_path("worktrees/%s/gitdir", wt->id));
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goto done;
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}
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if (flags & WT_VALIDATE_WORKTREE_MISSING_OK &&
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!file_exists(wt->path)) {
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ret = 0;
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goto done;
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}
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if (!file_exists(wt_path.buf)) {
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strbuf_addf_gently(errmsg, _("'%s' does not exist"), wt_path.buf);
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goto done;
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}
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path = xstrdup_or_null(read_gitfile_gently(wt_path.buf, &err));
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if (!path) {
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strbuf_addf_gently(errmsg, _("'%s' is not a .git file, error code %d"),
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wt_path.buf, err);
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goto done;
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}
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strbuf_realpath(&realpath, git_common_path("worktrees/%s", wt->id), 1);
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ret = fspathcmp(path, realpath.buf);
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if (ret)
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strbuf_addf_gently(errmsg, _("'%s' does not point back to '%s'"),
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wt->path, git_common_path("worktrees/%s", wt->id));
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done:
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free(path);
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strbuf_release(&wt_path);
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strbuf_release(&realpath);
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return ret;
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}
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void update_worktree_location(struct worktree *wt, const char *path_)
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{
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struct strbuf path = STRBUF_INIT;
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if (is_main_worktree(wt))
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BUG("can't relocate main worktree");
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strbuf_realpath(&path, path_, 1);
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if (fspathcmp(wt->path, path.buf)) {
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write_file(git_common_path("worktrees/%s/gitdir", wt->id),
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"%s/.git", path.buf);
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free(wt->path);
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wt->path = strbuf_detach(&path, NULL);
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}
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strbuf_release(&path);
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}
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int is_worktree_being_rebased(const struct worktree *wt,
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const char *target)
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{
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struct wt_status_state state;
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int found_rebase;
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memset(&state, 0, sizeof(state));
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found_rebase = wt_status_check_rebase(wt, &state) &&
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((state.rebase_in_progress ||
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state.rebase_interactive_in_progress) &&
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state.branch &&
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starts_with(target, "refs/heads/") &&
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!strcmp(state.branch, target + strlen("refs/heads/")));
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free(state.branch);
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free(state.onto);
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return found_rebase;
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}
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int is_worktree_being_bisected(const struct worktree *wt,
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const char *target)
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{
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struct wt_status_state state;
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int found_rebase;
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memset(&state, 0, sizeof(state));
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found_rebase = wt_status_check_bisect(wt, &state) &&
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state.branch &&
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starts_with(target, "refs/heads/") &&
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!strcmp(state.branch, target + strlen("refs/heads/"));
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free(state.branch);
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return found_rebase;
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}
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/*
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* note: this function should be able to detect shared symref even if
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* HEAD is temporarily detached (e.g. in the middle of rebase or
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* bisect). New commands that do similar things should update this
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* function as well.
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*/
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const struct worktree *find_shared_symref(const char *symref,
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const char *target)
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{
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const struct worktree *existing = NULL;
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static struct worktree **worktrees;
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int i = 0;
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if (worktrees)
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free_worktrees(worktrees);
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worktrees = get_worktrees();
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for (i = 0; worktrees[i]; i++) {
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struct worktree *wt = worktrees[i];
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const char *symref_target;
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struct ref_store *refs;
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int flags;
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if (wt->is_bare)
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continue;
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if (wt->is_detached && !strcmp(symref, "HEAD")) {
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if (is_worktree_being_rebased(wt, target)) {
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existing = wt;
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break;
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}
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if (is_worktree_being_bisected(wt, target)) {
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existing = wt;
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break;
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}
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}
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refs = get_worktree_ref_store(wt);
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symref_target = refs_resolve_ref_unsafe(refs, symref, 0,
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NULL, &flags);
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if ((flags & REF_ISSYMREF) &&
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symref_target && !strcmp(symref_target, target)) {
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existing = wt;
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break;
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}
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}
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return existing;
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}
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int submodule_uses_worktrees(const char *path)
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{
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char *submodule_gitdir;
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struct strbuf sb = STRBUF_INIT, err = STRBUF_INIT;
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DIR *dir;
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struct dirent *d;
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int ret = 0;
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struct repository_format format = REPOSITORY_FORMAT_INIT;
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submodule_gitdir = git_pathdup_submodule(path, "%s", "");
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if (!submodule_gitdir)
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return 0;
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/* The env would be set for the superproject. */
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get_common_dir_noenv(&sb, submodule_gitdir);
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free(submodule_gitdir);
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strbuf_addstr(&sb, "/config");
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read_repository_format(&format, sb.buf);
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if (verify_repository_format(&format, &err)) {
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strbuf_release(&err);
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strbuf_release(&sb);
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clear_repository_format(&format);
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return 1;
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}
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clear_repository_format(&format);
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strbuf_release(&err);
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/* Replace config by worktrees. */
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strbuf_setlen(&sb, sb.len - strlen("config"));
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strbuf_addstr(&sb, "worktrees");
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/* See if there is any file inside the worktrees directory. */
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dir = opendir(sb.buf);
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strbuf_release(&sb);
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if (!dir)
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return 0;
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while ((d = readdir(dir)) != NULL) {
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if (is_dot_or_dotdot(d->d_name))
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continue;
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ret = 1;
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break;
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}
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closedir(dir);
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return ret;
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}
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int parse_worktree_ref(const char *worktree_ref, const char **name,
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int *name_length, const char **ref)
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{
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if (skip_prefix(worktree_ref, "main-worktree/", &worktree_ref)) {
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if (!*worktree_ref)
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return -1;
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if (name)
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*name = NULL;
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if (name_length)
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*name_length = 0;
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if (ref)
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*ref = worktree_ref;
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return 0;
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}
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if (skip_prefix(worktree_ref, "worktrees/", &worktree_ref)) {
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const char *slash = strchr(worktree_ref, '/');
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if (!slash || slash == worktree_ref || !slash[1])
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return -1;
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if (name)
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*name = worktree_ref;
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if (name_length)
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*name_length = slash - worktree_ref;
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if (ref)
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*ref = slash + 1;
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return 0;
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}
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return -1;
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}
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void strbuf_worktree_ref(const struct worktree *wt,
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struct strbuf *sb,
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const char *refname)
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{
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switch (ref_type(refname)) {
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case REF_TYPE_PSEUDOREF:
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case REF_TYPE_PER_WORKTREE:
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if (wt && !wt->is_current) {
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if (is_main_worktree(wt))
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strbuf_addstr(sb, "main-worktree/");
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else
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strbuf_addf(sb, "worktrees/%s/", wt->id);
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}
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break;
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case REF_TYPE_MAIN_PSEUDOREF:
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case REF_TYPE_OTHER_PSEUDOREF:
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|
break;
|
|
|
|
case REF_TYPE_NORMAL:
|
|
/*
|
|
* For shared refs, don't prefix worktrees/ or
|
|
* main-worktree/. It's not necessary and
|
|
* files-backend.c can't handle it anyway.
|
|
*/
|
|
break;
|
|
}
|
|
strbuf_addstr(sb, refname);
|
|
}
|
|
|
|
const char *worktree_ref(const struct worktree *wt, const char *refname)
|
|
{
|
|
static struct strbuf sb = STRBUF_INIT;
|
|
|
|
strbuf_reset(&sb);
|
|
strbuf_worktree_ref(wt, &sb, refname);
|
|
return sb.buf;
|
|
}
|
|
|
|
int other_head_refs(each_ref_fn fn, void *cb_data)
|
|
{
|
|
struct worktree **worktrees, **p;
|
|
int ret = 0;
|
|
|
|
worktrees = get_worktrees();
|
|
for (p = worktrees; *p; p++) {
|
|
struct worktree *wt = *p;
|
|
struct object_id oid;
|
|
int flag;
|
|
|
|
if (wt->is_current)
|
|
continue;
|
|
|
|
if (!refs_read_ref_full(get_main_ref_store(the_repository),
|
|
worktree_ref(wt, "HEAD"),
|
|
RESOLVE_REF_READING,
|
|
&oid, &flag))
|
|
ret = fn(worktree_ref(wt, "HEAD"), &oid, flag, cb_data);
|
|
if (ret)
|
|
break;
|
|
}
|
|
free_worktrees(worktrees);
|
|
return ret;
|
|
}
|