зеркало из https://github.com/microsoft/git.git
83 строки
2.0 KiB
C
83 строки
2.0 KiB
C
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#include "cache.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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static char *find_linked_symref(const char *symref, const char *branch,
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const char *id)
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{
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struct strbuf sb = STRBUF_INIT;
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struct strbuf path = STRBUF_INIT;
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struct strbuf gitdir = STRBUF_INIT;
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char *existing = NULL;
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/*
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* $GIT_COMMON_DIR/$symref (e.g. HEAD) is practically outside
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* $GIT_DIR so resolve_ref_unsafe() won't work (it uses
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* git_path). Parse the ref ourselves.
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*/
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if (id)
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strbuf_addf(&path, "%s/worktrees/%s/%s", get_git_common_dir(), id, symref);
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else
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strbuf_addf(&path, "%s/%s", get_git_common_dir(), symref);
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if (!strbuf_readlink(&sb, path.buf, 0)) {
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if (!starts_with(sb.buf, "refs/") ||
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check_refname_format(sb.buf, 0))
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goto done;
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} else if (strbuf_read_file(&sb, path.buf, 0) >= 0 &&
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starts_with(sb.buf, "ref:")) {
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strbuf_remove(&sb, 0, strlen("ref:"));
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strbuf_trim(&sb);
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} else
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goto done;
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if (strcmp(sb.buf, branch))
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goto done;
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if (id) {
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strbuf_reset(&path);
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strbuf_addf(&path, "%s/worktrees/%s/gitdir", get_git_common_dir(), id);
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if (strbuf_read_file(&gitdir, path.buf, 0) <= 0)
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goto done;
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strbuf_rtrim(&gitdir);
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} else
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strbuf_addstr(&gitdir, get_git_common_dir());
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strbuf_strip_suffix(&gitdir, ".git");
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existing = strbuf_detach(&gitdir, NULL);
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done:
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strbuf_release(&path);
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strbuf_release(&sb);
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strbuf_release(&gitdir);
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return existing;
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}
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char *find_shared_symref(const char *symref, const char *target)
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{
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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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char *existing;
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if ((existing = find_linked_symref(symref, target, NULL)))
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return existing;
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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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return NULL;
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while ((d = readdir(dir)) != NULL) {
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if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
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continue;
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existing = find_linked_symref(symref, target, d->d_name);
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if (existing)
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goto done;
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}
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done:
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closedir(dir);
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return existing;
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}
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