From 0c6bd2b81d1e18dfa1e143c354c554cca34b3685 Mon Sep 17 00:00:00 2001 From: Patrick Steinhardt Date: Tue, 7 May 2024 06:52:51 +0200 Subject: path: move `validate_headref()` to its only user While `validate_headref()` is only called from `is_git_directory()` in "setup.c", it is currently implemented in "path.c". Move it over such that it becomes clear that it is only really used during setup in order to discover repositories. Signed-off-by: Patrick Steinhardt Signed-off-by: Junio C Hamano --- setup.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) (limited to 'setup.c') diff --git a/setup.c b/setup.c index f4b32f76e3..7c996659bd 100644 --- a/setup.c +++ b/setup.c @@ -4,6 +4,7 @@ #include "environment.h" #include "exec-cmd.h" #include "gettext.h" +#include "hex.h" #include "object-name.h" #include "refs.h" #include "repository.h" @@ -341,6 +342,58 @@ int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) return ret; } +static int validate_headref(const char *path) +{ + struct stat st; + char buffer[256]; + const char *refname; + struct object_id oid; + int fd; + ssize_t len; + + if (lstat(path, &st) < 0) + return -1; + + /* Make sure it is a "refs/.." symlink */ + if (S_ISLNK(st.st_mode)) { + len = readlink(path, buffer, sizeof(buffer)-1); + if (len >= 5 && !memcmp("refs/", buffer, 5)) + return 0; + return -1; + } + + /* + * Anything else, just open it and try to see if it is a symbolic ref. + */ + fd = open(path, O_RDONLY); + if (fd < 0) + return -1; + len = read_in_full(fd, buffer, sizeof(buffer)-1); + close(fd); + + if (len < 0) + return -1; + buffer[len] = '\0'; + + /* + * Is it a symbolic ref? + */ + if (skip_prefix(buffer, "ref:", &refname)) { + while (isspace(*refname)) + refname++; + if (starts_with(refname, "refs/")) + return 0; + } + + /* + * Is this a detached HEAD? + */ + if (get_oid_hex_any(buffer, &oid) != GIT_HASH_UNKNOWN) + return 0; + + return -1; +} + /* * Test if it looks like we're at a git directory. * We want to see: -- cgit v1.2.3