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Teach ref iteration module about submodules
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We will use this in a later patch to extend setup_revisions() to
load revisions directly from a submodule.

Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Heiko Voigt authored and Junio C Hamano committed Jul 7, 2010
1 parent 78db709 commit 0bad611
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Showing 3 changed files with 127 additions and 32 deletions.
3 changes: 3 additions & 0 deletions cache.h
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Original file line number Diff line number Diff line change
Expand Up @@ -641,6 +641,9 @@ extern char *git_pathdup(const char *fmt, ...)
/* Return a statically allocated filename matching the sha1 signature */
extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
extern char *git_path_submodule(const char *path, const char *fmt, ...)
__attribute__((format (printf, 2, 3)));

extern char *sha1_file_name(const unsigned char *sha1);
extern char *sha1_pack_name(const unsigned char *sha1);
extern char *sha1_pack_index_name(const unsigned char *sha1);
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38 changes: 38 additions & 0 deletions path.c
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Original file line number Diff line number Diff line change
Expand Up @@ -122,6 +122,44 @@ char *git_path(const char *fmt, ...)
return cleanup_path(pathname);
}

char *git_path_submodule(const char *path, const char *fmt, ...)
{
char *pathname = get_pathname();
struct strbuf buf = STRBUF_INIT;
const char *git_dir;
va_list args;
unsigned len;

len = strlen(path);
if (len > PATH_MAX-100)
return bad_path;

strbuf_addstr(&buf, path);
if (len && path[len-1] != '/')
strbuf_addch(&buf, '/');
strbuf_addstr(&buf, ".git");

git_dir = read_gitfile_gently(buf.buf);
if (git_dir) {
strbuf_reset(&buf);
strbuf_addstr(&buf, git_dir);
}
strbuf_addch(&buf, '/');

if (buf.len >= PATH_MAX)
return bad_path;
memcpy(pathname, buf.buf, buf.len + 1);

strbuf_release(&buf);
len = strlen(pathname);

va_start(args, fmt);
len += vsnprintf(pathname + len, PATH_MAX - len, fmt, args);
va_end(args);
if (len >= PATH_MAX)
return bad_path;
return cleanup_path(pathname);
}

/* git_mkstemp() - create tmp file honoring TMPDIR variable */
int git_mkstemp(char *path, size_t len, const char *template)
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118 changes: 86 additions & 32 deletions refs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -157,7 +157,7 @@ static struct cached_refs {
char did_packed;
struct ref_list *loose;
struct ref_list *packed;
} cached_refs;
} cached_refs, submodule_refs;
static struct ref_list *current_ref;

static struct ref_list *extra_refs;
Expand Down Expand Up @@ -229,23 +229,45 @@ void clear_extra_refs(void)
extra_refs = NULL;
}

static struct ref_list *get_packed_refs(void)
static struct ref_list *get_packed_refs(const char *submodule)
{
if (!cached_refs.did_packed) {
FILE *f = fopen(git_path("packed-refs"), "r");
cached_refs.packed = NULL;
const char *packed_refs_file;
struct cached_refs *refs;

if (submodule) {
packed_refs_file = git_path_submodule(submodule, "packed-refs");
refs = &submodule_refs;
free_ref_list(refs->packed);
} else {
packed_refs_file = git_path("packed-refs");
refs = &cached_refs;
}

if (!refs->did_packed || submodule) {
FILE *f = fopen(packed_refs_file, "r");
refs->packed = NULL;
if (f) {
read_packed_refs(f, &cached_refs);
read_packed_refs(f, refs);
fclose(f);
}
cached_refs.did_packed = 1;
refs->did_packed = 1;
}
return cached_refs.packed;
return refs->packed;
}

static struct ref_list *get_ref_dir(const char *base, struct ref_list *list)
static struct ref_list *get_ref_dir(const char *submodule, const char *base,
struct ref_list *list)
{
DIR *dir = opendir(git_path("%s", base));
DIR *dir;
const char *path;

if (submodule)
path = git_path_submodule(submodule, "%s", base);
else
path = git_path("%s", base);


dir = opendir(path);

if (dir) {
struct dirent *de;
Expand All @@ -261,6 +283,7 @@ static struct ref_list *get_ref_dir(const char *base, struct ref_list *list)
struct stat st;
int flag;
int namelen;
const char *refdir;

if (de->d_name[0] == '.')
continue;
Expand All @@ -270,16 +293,27 @@ static struct ref_list *get_ref_dir(const char *base, struct ref_list *list)
if (has_extension(de->d_name, ".lock"))
continue;
memcpy(ref + baselen, de->d_name, namelen+1);
if (stat(git_path("%s", ref), &st) < 0)
refdir = submodule
? git_path_submodule(submodule, "%s", ref)
: git_path("%s", ref);
if (stat(refdir, &st) < 0)
continue;
if (S_ISDIR(st.st_mode)) {
list = get_ref_dir(ref, list);
list = get_ref_dir(submodule, ref, list);
continue;
}
if (!resolve_ref(ref, sha1, 1, &flag)) {
if (submodule) {
hashclr(sha1);
flag |= REF_BROKEN;
}
flag = 0;
if (resolve_gitlink_ref(submodule, ref, sha1) < 0) {
hashclr(sha1);
flag |= REF_BROKEN;
}
} else
if (!resolve_ref(ref, sha1, 1, &flag)) {
hashclr(sha1);
flag |= REF_BROKEN;
}
list = add_ref(ref, sha1, flag, list, NULL);
}
free(ref);
Expand Down Expand Up @@ -322,10 +356,16 @@ void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname)
for_each_rawref(warn_if_dangling_symref, &data);
}

static struct ref_list *get_loose_refs(void)
static struct ref_list *get_loose_refs(const char *submodule)
{
if (submodule) {
free_ref_list(submodule_refs.loose);
submodule_refs.loose = get_ref_dir(submodule, "refs", NULL);
return submodule_refs.loose;
}

if (!cached_refs.did_loose) {
cached_refs.loose = get_ref_dir("refs", NULL);
cached_refs.loose = get_ref_dir(NULL, "refs", NULL);
cached_refs.did_loose = 1;
}
return cached_refs.loose;
Expand Down Expand Up @@ -459,7 +499,7 @@ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *
git_snpath(path, sizeof(path), "%s", ref);
/* Special case: non-existing file. */
if (lstat(path, &st) < 0) {
struct ref_list *list = get_packed_refs();
struct ref_list *list = get_packed_refs(NULL);
while (list) {
if (!strcmp(ref, list->name)) {
hashcpy(sha1, list->sha1);
Expand Down Expand Up @@ -588,7 +628,7 @@ int peel_ref(const char *ref, unsigned char *sha1)
return -1;

if ((flag & REF_ISPACKED)) {
struct ref_list *list = get_packed_refs();
struct ref_list *list = get_packed_refs(NULL);

while (list) {
if (!strcmp(list->name, ref)) {
Expand All @@ -615,12 +655,12 @@ int peel_ref(const char *ref, unsigned char *sha1)
return -1;
}

static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
int flags, void *cb_data)
static int do_for_each_ref(const char *submodule, const char *base, each_ref_fn fn,
int trim, int flags, void *cb_data)
{
int retval = 0;
struct ref_list *packed = get_packed_refs();
struct ref_list *loose = get_loose_refs();
struct ref_list *packed = get_packed_refs(submodule);
struct ref_list *loose = get_loose_refs(submodule);

struct ref_list *extra;

Expand Down Expand Up @@ -657,24 +697,38 @@ static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
return retval;
}

int head_ref(each_ref_fn fn, void *cb_data)

static int do_head_ref(const char *submodule, each_ref_fn fn, void *cb_data)
{
unsigned char sha1[20];
int flag;

if (submodule) {
if (resolve_gitlink_ref(submodule, "HEAD", sha1) == 0)
return fn("HEAD", sha1, 0, cb_data);

return 0;
}

if (resolve_ref("HEAD", sha1, 1, &flag))
return fn("HEAD", sha1, flag, cb_data);

return 0;
}

int head_ref(each_ref_fn fn, void *cb_data)
{
return do_head_ref(NULL, fn, cb_data);
}

int for_each_ref(each_ref_fn fn, void *cb_data)
{
return do_for_each_ref("refs/", fn, 0, 0, cb_data);
return do_for_each_ref(NULL, "refs/", fn, 0, 0, cb_data);
}

int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data)
{
return do_for_each_ref(prefix, fn, strlen(prefix), 0, cb_data);
return do_for_each_ref(NULL, prefix, fn, strlen(prefix), 0, cb_data);
}

int for_each_tag_ref(each_ref_fn fn, void *cb_data)
Expand All @@ -694,7 +748,7 @@ int for_each_remote_ref(each_ref_fn fn, void *cb_data)

int for_each_replace_ref(each_ref_fn fn, void *cb_data)
{
return do_for_each_ref("refs/replace/", fn, 13, 0, cb_data);
return do_for_each_ref(NULL, "refs/replace/", fn, 13, 0, cb_data);
}

int for_each_glob_ref_in(each_ref_fn fn, const char *pattern,
Expand Down Expand Up @@ -734,7 +788,7 @@ int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data)

int for_each_rawref(each_ref_fn fn, void *cb_data)
{
return do_for_each_ref("refs/", fn, 0,
return do_for_each_ref(NULL, "refs/", fn, 0,
DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
}

Expand Down Expand Up @@ -958,7 +1012,7 @@ static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char
* name is a proper prefix of our refname.
*/
if (missing &&
!is_refname_available(ref, NULL, get_packed_refs(), 0)) {
!is_refname_available(ref, NULL, get_packed_refs(NULL), 0)) {
last_errno = ENOTDIR;
goto error_return;
}
Expand Down Expand Up @@ -1021,7 +1075,7 @@ static int repack_without_ref(const char *refname)
int fd;
int found = 0;

packed_ref_list = get_packed_refs();
packed_ref_list = get_packed_refs(NULL);
for (list = packed_ref_list; list; list = list->next) {
if (!strcmp(refname, list->name)) {
found = 1;
Expand Down Expand Up @@ -1110,10 +1164,10 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg)
if (!symref)
return error("refname %s not found", oldref);

if (!is_refname_available(newref, oldref, get_packed_refs(), 0))
if (!is_refname_available(newref, oldref, get_packed_refs(NULL), 0))
return 1;

if (!is_refname_available(newref, oldref, get_loose_refs(), 0))
if (!is_refname_available(newref, oldref, get_loose_refs(NULL), 0))
return 1;

lock = lock_ref_sha1_basic(renamed_ref, NULL, 0, NULL);
Expand Down

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