[PATCH 1/3] clone: do not accept --depth on local clones

[PATCH 1/3] clone: do not accept --depth on local clones

[Nguyễn Thái Ngọc Duy]

clone_local() function disregards --depth. Make it more apparent.
Also hint users that file:// works with --depth.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 builtin/clone.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/builtin/clone.c b/builtin/clone.c
index efb1e6f..e787cf2 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -361,7 +361,7 @@ static void write_remote_refs(const struct ref *local_refs)
 
 int cmd_clone(int argc, const char **argv, const char *prefix)
 {
-	int is_bundle = 0;
+	int is_bundle = 0, is_local;
 	struct stat buf;
 	const char *repo_name, *repo, *work_tree, *git_dir;
 	char *path, *dir;
@@ -414,6 +414,10 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		repo = xstrdup(make_absolute_path(repo_name));
 	else
 		repo = repo_name;
+	is_local = path && !is_bundle;
+	if (is_local && option_depth)
+		die("local clone with --depth does not make sense\n"
+		    "hint: use file:// instead");
 
 	if (argc == 2)
 		dir = xstrdup(argv[1]);
@@ -514,7 +518,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
 	strbuf_reset(&value);
 
-	if (path && !is_bundle) {
+	if (is_local) {
 		refs = clone_local(path, git_dir);
 		mapped_refs = wanted_peer_refs(refs, refspec);
 	} else {
-- 
1.7.1.rc1.69.g24c2f7

[PATCH 2/3] fetch-pack: use args.shallow to detect shallow clone instead of args.depth

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 builtin/fetch-pack.c |   17 ++++++++++-------
 fetch-pack.h         |    3 ++-
 transport.c          |    9 +++++++--
 transport.h          |    1 +
 4 files changed, 20 insertions(+), 10 deletions(-)

diff --git a/builtin/fetch-pack.c b/builtin/fetch-pack.c
index dbd8b7b..45d1824 100644
--- a/builtin/fetch-pack.c
+++ b/builtin/fetch-pack.c
@@ -167,7 +167,7 @@ enum ack_type {
 
 static void consume_shallow_list(int fd)
 {
-	if (args.stateless_rpc && args.depth > 0) {
+	if (args.stateless_rpc && args.shallow) {
 		/* If we sent a depth we will get back "duplicate"
 		 * shallow and unshallow commands every time there
 		 * is a block of have lines exchanged.
@@ -283,12 +283,12 @@ static int find_common(int fd[2], unsigned char *result_sha1,
 
 	if (is_repository_shallow())
 		write_shallow_commits(&req_buf, 1);
-	if (args.depth > 0)
+	if (args.shallow)
 		packet_buf_write(&req_buf, "deepen %d", args.depth);
 	packet_buf_flush(&req_buf);
 	state_len = req_buf.len;
 
-	if (args.depth > 0) {
+	if (args.shallow) {
 		char line[1024];
 		unsigned char sha1[20];
 
@@ -476,7 +476,7 @@ static void filter_refs(struct ref **refs, int nr_match, char **match)
 		    check_ref_format(ref->name + 5))
 			; /* trash */
 		else if (args.fetch_all &&
-			 (!args.depth || prefixcmp(ref->name, "refs/tags/") )) {
+			 (!args.shallow || prefixcmp(ref->name, "refs/tags/") )) {
 			*newtail = ref;
 			ref->next = NULL;
 			newtail = &ref->next;
@@ -534,7 +534,7 @@ static int everything_local(struct ref **refs, int nr_match, char **match)
 		}
 	}
 
-	if (!args.depth) {
+	if (!args.shallow) {
 		for_each_ref(mark_complete, NULL);
 		if (cutoff)
 			mark_recent_complete_commits(cutoff);
@@ -845,6 +845,9 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 			}
 			if (!prefixcmp(arg, "--depth=")) {
 				args.depth = strtol(arg + 8, NULL, 0);
+				if (args.depth <= 0)
+					die("Invalid depth %d", args.depth);
+				args.shallow = 1;
 				continue;
 			}
 			if (!strcmp("--no-progress", arg)) {
@@ -928,7 +931,7 @@ struct ref *fetch_pack(struct fetch_pack_args *my_args,
 	fetch_pack_setup();
 	if (&args != my_args)
 		memcpy(&args, my_args, sizeof(args));
-	if (args.depth > 0) {
+	if (args.shallow) {
 		if (stat(git_path("shallow"), &st))
 			st.st_mtime = 0;
 	}
@@ -941,7 +944,7 @@ struct ref *fetch_pack(struct fetch_pack_args *my_args,
 	}
 	ref_cpy = do_fetch_pack(fd, ref, nr_heads, heads, pack_lockfile);
 
-	if (args.depth > 0) {
+	if (args.shallow) {
 		struct cache_time mtime;
 		struct strbuf sb = STRBUF_INIT;
 		char *shallow = git_path("shallow");
diff --git a/fetch-pack.h b/fetch-pack.h
index fbe85ac..abc1ab7 100644
--- a/fetch-pack.h
+++ b/fetch-pack.h
@@ -14,7 +14,8 @@ struct fetch_pack_args
 		verbose:1,
 		no_progress:1,
 		include_tag:1,
-		stateless_rpc:1;
+		stateless_rpc:1,
+		shallow:1;
 };
 
 struct ref *fetch_pack(struct fetch_pack_args *args,
diff --git a/transport.c b/transport.c
index 4dba6f8..cf7030b 100644
--- a/transport.c
+++ b/transport.c
@@ -470,10 +470,14 @@ static int set_git_option(struct git_transport_options *opts,
 		opts->keep = !!value;
 		return 0;
 	} else if (!strcmp(name, TRANS_OPT_DEPTH)) {
-		if (!value)
+		if (!value) {
 			opts->depth = 0;
-		else
+			opts->shallow = 0;
+		}
+		else {
 			opts->depth = atoi(value);
+			opts->shallow = 1;
+		}
 		return 0;
 	}
 	return 1;
@@ -529,6 +533,7 @@ static int fetch_refs_via_pack(struct transport *transport,
 	args.quiet = (transport->verbose < 0);
 	args.no_progress = !transport->progress;
 	args.depth = data->options.depth;
+	args.shallow = data->options.shallow;
 
 	for (i = 0; i < nr_heads; i++)
 		origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
diff --git a/transport.h b/transport.h
index c59d973..e6ac4b1 100644
--- a/transport.h
+++ b/transport.h
@@ -8,6 +8,7 @@ struct git_transport_options {
 	unsigned thin : 1;
 	unsigned keep : 1;
 	unsigned followtags : 1;
+	unsigned shallow : 1;
 	int depth;
 	const char *uploadpack;
 	const char *receivepack;
-- 
1.7.1.rc1.69.g24c2f7

[PATCH 3/3] {fetch,upload}-pack: allow --depth=0 for infinite depth

[Nguyễn Thái Ngọc Duy]

Users can do --depth=2147483648 for infinite depth now. It just looks
ugly. So make "0" special (i.e. infinite depth) at plumbing/protocol
level.

To make it even more user friendly, "git fetch" accepts --depth=inf as
an alternative to --depth=0. "git clone" also can. It just does not
make much sense for doing "git clone --depth=inf"

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 Documentation/fetch-options.txt     |    3 ++-
 Documentation/git-fetch-pack.txt    |    1 +
 Documentation/technical/shallow.txt |    2 ++
 builtin/fetch-pack.c                |    2 +-
 shallow.c                           |    2 +-
 t/t5500-fetch-pack.sh               |    8 ++++++++
 transport.c                         |    2 +-
 upload-pack.c                       |    8 ++++----
 8 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/Documentation/fetch-options.txt b/Documentation/fetch-options.txt
index 9333c42..a22d839 100644
--- a/Documentation/fetch-options.txt
+++ b/Documentation/fetch-options.txt
@@ -10,7 +10,8 @@
 --depth=<depth>::
 	Deepen the history of a 'shallow' repository created by
 	`git clone` with `--depth=<depth>` option (see linkgit:git-clone[1])
-	by the specified number of commits.
+	by the specified number of commits. Specify "inf" for
+	infinite depth.
 
 ifndef::git-pull[]
 --dry-run::
diff --git a/Documentation/git-fetch-pack.txt b/Documentation/git-fetch-pack.txt
index 4a8487c..75e4669 100644
--- a/Documentation/git-fetch-pack.txt
+++ b/Documentation/git-fetch-pack.txt
@@ -70,6 +70,7 @@ OPTIONS
 
 --depth=<n>::
 	Limit fetching to ancestor-chains not longer than n.
+	Specify 0 for infinite depth.
 
 --no-progress::
 	Do not show the progress.
diff --git a/Documentation/technical/shallow.txt b/Documentation/technical/shallow.txt
index 559263a..405170f 100644
--- a/Documentation/technical/shallow.txt
+++ b/Documentation/technical/shallow.txt
@@ -47,3 +47,5 @@ It also writes an appropriate $GIT_DIR/shallow.
 You can deepen a shallow repository with "git-fetch --depth 20
 repo branch", which will fetch branch from repo, but stop at depth
 20, updating $GIT_DIR/shallow.
+
+"--depth 0" (or "--depth inf" for git-fetch) means infinite depth.
diff --git a/builtin/fetch-pack.c b/builtin/fetch-pack.c
index 45d1824..7d7af2e 100644
--- a/builtin/fetch-pack.c
+++ b/builtin/fetch-pack.c
@@ -845,7 +845,7 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 			}
 			if (!prefixcmp(arg, "--depth=")) {
 				args.depth = strtol(arg + 8, NULL, 0);
-				if (args.depth <= 0)
+				if (args.depth < 0)
 					die("Invalid depth %d", args.depth);
 				args.shallow = 1;
 				continue;
diff --git a/shallow.c b/shallow.c
index 4d90eda..eab97c6 100644
--- a/shallow.c
+++ b/shallow.c
@@ -85,7 +85,7 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
 					continue;
 				*pointer = cur_depth;
 			}
-			if (cur_depth < depth) {
+			if (!depth || cur_depth < depth) {
 				if (p->next)
 					add_object_array(&p->item->object,
 							NULL, &stack);
diff --git a/t/t5500-fetch-pack.sh b/t/t5500-fetch-pack.sh
index 18376d6..47fd87c 100755
--- a/t/t5500-fetch-pack.sh
+++ b/t/t5500-fetch-pack.sh
@@ -248,4 +248,12 @@ test_expect_success 'clone shallow object count' '
 	grep "^count: 52" count.shallow
 '
 
+test_expect_success 'infinite deepening (full repo)' '
+	(
+		cd shallow &&
+		git fetch --depth=inf &&
+		! test -f .git/shallow
+	)
+'
+
 test_done
diff --git a/transport.c b/transport.c
index cf7030b..9303aef 100644
--- a/transport.c
+++ b/transport.c
@@ -475,7 +475,7 @@ static int set_git_option(struct git_transport_options *opts,
 			opts->shallow = 0;
 		}
 		else {
-			opts->depth = atoi(value);
+			opts->depth = !strcmp(value, "inf") ? 0 : atoi(value);
 			opts->shallow = 1;
 		}
 		return 0;
diff --git a/upload-pack.c b/upload-pack.c
index fc79dde..7b004b9 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -484,7 +484,7 @@ static void receive_needs(void)
 {
 	struct object_array shallows = {0, 0, NULL};
 	static char line[1000];
-	int len, depth = 0;
+	int len, depth = -1;
 
 	shallow_nr = 0;
 	if (debug_fd)
@@ -514,7 +514,7 @@ static void receive_needs(void)
 		if (!prefixcmp(line, "deepen ")) {
 			char *end;
 			depth = strtol(line + 7, &end, 0);
-			if (end == line + 7 || depth <= 0)
+			if (end == line + 7 || depth < 0)
 				die("Invalid deepen: %s", line);
 			continue;
 		}
@@ -562,9 +562,9 @@ static void receive_needs(void)
 	if (!use_sideband && daemon_mode)
 		no_progress = 1;
 
-	if (depth == 0 && shallows.nr == 0)
+	if (depth == -1 && shallows.nr == 0)
 		return;
-	if (depth > 0) {
+	if (depth >= 0) {
 		struct commit_list *result, *backup;
 		int i;
 		backup = result = get_shallow_commits(&want_obj, depth,
-- 
1.7.1.rc1.69.g24c2f7

Re: [PATCH 3/3] {fetch,upload}-pack: allow --depth=0 for infinite depth

[Jakub Narebski]

On Fri, 20 Aug 2010, Nguyễn Thái Ngọc Duy wrote:

> diff --git a/Documentation/fetch-options.txt b/Documentation/fetch-options.txt
> index 9333c42..a22d839 100644
> --- a/Documentation/fetch-options.txt
> +++ b/Documentation/fetch-options.txt
> @@ -10,7 +10,8 @@
>  --depth=<depth>::
>  	Deepen the history of a 'shallow' repository created by
>  	`git clone` with `--depth=<depth>` option (see linkgit:git-clone[1])
> -	by the specified number of commits.
> +	by the specified number of commits. Specify "inf" for
> +	infinite depth.

It should probably be 'Specify 0 or "inf" for infinite (unlimited) depth',
which means making repository non-shallow.
  
>  ifndef::git-pull[]
>  --dry-run::
> diff --git a/Documentation/git-fetch-pack.txt b/Documentation/git-fetch-pack.txt
> index 4a8487c..75e4669 100644
> --- a/Documentation/git-fetch-pack.txt
> +++ b/Documentation/git-fetch-pack.txt
> @@ -70,6 +70,7 @@ OPTIONS
>  
>  --depth=<n>::
>  	Limit fetching to ancestor-chains not longer than n.
> +	Specify 0 for infinite depth.

Again '0 or "inf"'.
  
>  --no-progress::
>  	Do not show the progress.
> diff --git a/Documentation/technical/shallow.txt b/Documentation/technical/shallow.txt
> index 559263a..405170f 100644
> --- a/Documentation/technical/shallow.txt
> +++ b/Documentation/technical/shallow.txt
> @@ -47,3 +47,5 @@ It also writes an appropriate $GIT_DIR/shallow.
>  You can deepen a shallow repository with "git-fetch --depth 20
>  repo branch", which will fetch branch from repo, but stop at depth
>  20, updating $GIT_DIR/shallow.
> +
> +"--depth 0" (or "--depth inf" for git-fetch) means infinite depth.

???

> diff --git a/t/t5500-fetch-pack.sh b/t/t5500-fetch-pack.sh
> index 18376d6..47fd87c 100755
> --- a/t/t5500-fetch-pack.sh
> +++ b/t/t5500-fetch-pack.sh
> @@ -248,4 +248,12 @@ test_expect_success 'clone shallow object count' '
>  	grep "^count: 52" count.shallow
>  '
>  
> +test_expect_success 'infinite deepening (full repo)' '
> +	(
> +		cd shallow &&
> +		git fetch --depth=inf &&
> +		! test -f .git/shallow
> +	)
> +'
> +
>  test_done

It's very good that you included test of making repository non-shallow.

-- 
Jakub Narebski
Poland

Re: [PATCH 1/3] clone: do not accept --depth on local clones

[Junio C Hamano]

Nguyễn Thái Ngọc Duy <pclouds@gmail.com> writes:

> clone_local() function disregards --depth. Make it more apparent.
> Also hint users that file:// works with --depth.

Hmm---why?

The "--depth" option is an ugly hack that tries to conserve network
bandwidth and disk usage, which is not necessary if you are doing a local
hardlinking clone.  Without this patch we allowed people to clone with the
option without a downside (allowing it didn't result in broken repository,
for example), but with it, what has long been allowed suddenly stops
working.  Is the breakage justifiable?

Re: [PATCH 3/3] {fetch,upload}-pack: allow --depth=0 for infinite depth

[Junio C Hamano]

Nguyễn Thái Ngọc Duy <pclouds@gmail.com> writes:

> diff --git a/Documentation/fetch-options.txt b/Documentation/fetch-options.txt
> index 9333c42..a22d839 100644
> --- a/Documentation/fetch-options.txt
> +++ b/Documentation/fetch-options.txt
> @@ -10,7 +10,8 @@
>  --depth=<depth>::
>  	Deepen the history of a 'shallow' repository created by
>  	`git clone` with `--depth=<depth>` option (see linkgit:git-clone[1])
> -	by the specified number of commits.
> +	by the specified number of commits. Specify "inf" for
> +	infinite depth.
>  
>  ifndef::git-pull[]
>  --dry-run::
> diff --git a/Documentation/git-fetch-pack.txt b/Documentation/git-fetch-pack.txt
> index 4a8487c..75e4669 100644
> --- a/Documentation/git-fetch-pack.txt
> +++ b/Documentation/git-fetch-pack.txt
> @@ -70,6 +70,7 @@ OPTIONS
>  
>  --depth=<n>::
>  	Limit fetching to ancestor-chains not longer than n.
> +	Specify 0 for infinite depth.
>  

Should we force users to remember which one is which?

> diff --git a/transport.c b/transport.c
> index cf7030b..9303aef 100644
> --- a/transport.c
> +++ b/transport.c
> @@ -475,7 +475,7 @@ static int set_git_option(struct git_transport_options *opts,
>  			opts->shallow = 0;
>  		}
>  		else {
> -			opts->depth = atoi(value);
> +			opts->depth = !strcmp(value, "inf") ? 0 : atoi(value);

Doesn't atoi("inf") give you 0 anyway ;-)?

Re: [PATCH 1/3] clone: do not accept --depth on local clones

[Nguyen Thai Ngoc Duy]

On Sat, Aug 21, 2010 at 10:27 AM, Junio C Hamano <gitster@pobox.com> wrote:
> Nguyễn Thái Ngọc Duy <pclouds@gmail.com> writes:
>
>> clone_local() function disregards --depth. Make it more apparent.
>> Also hint users that file:// works with --depth.
>
> Hmm---why?
>
> The "--depth" option is an ugly hack that tries to conserve network
> bandwidth and disk usage, which is not necessary if you are doing a local
> hardlinking clone.  Without this patch we allowed people to clone with the
> option without a downside (allowing it didn't result in broken repository,
> for example), but with it, what has long been allowed suddenly stops
> working.  Is the breakage justifiable?

I also expect it to cut down history too. Maybe it's just me, when I
say --depth=3, 'git log' should give me more or less 3 commits
regardless what kind of transport I use to clone. Or we could make it
a warning, "--depth is ignored in local clone"?
-- 
Duy

Re: [PATCH 3/3] {fetch,upload}-pack: allow --depth=0 for infinite depth

[Nguyen Thai Ngoc Duy]

On Sat, Aug 21, 2010 at 8:11 AM, Jakub Narebski <jnareb@gmail.com> wrote:
> On Fri, 20 Aug 2010, Nguyễn Thái Ngọc Duy wrote:
>
>> diff --git a/Documentation/fetch-options.txt
>> b/Documentation/fetch-options.txt
>> index 9333c42..a22d839 100644
>> --- a/Documentation/fetch-options.txt
>> +++ b/Documentation/fetch-options.txt
>> @@ -10,7 +10,8 @@
>>  --depth=<depth>::
>>       Deepen the history of a 'shallow' repository created by
>>       `git clone` with `--depth=<depth>` option (see linkgit:git-clone[1])
>> -     by the specified number of commits.
>> +     by the specified number of commits. Specify "inf" for
>> +     infinite depth.
>
> It should probably be 'Specify 0 or "inf" for infinite (unlimited) depth',
> which means making repository non-shallow.

It would say "... which _may_ make the repository non-shallow". Or I
have to redo the patch and make sure tags are fetched automatically
too. Hmm..

>>  ifndef::git-pull[]
>>  --dry-run::
>> diff --git a/Documentation/git-fetch-pack.txt
>> b/Documentation/git-fetch-pack.txt
>> index 4a8487c..75e4669 100644
>> --- a/Documentation/git-fetch-pack.txt
>> +++ b/Documentation/git-fetch-pack.txt
>> @@ -70,6 +70,7 @@ OPTIONS
>>
>>  --depth=<n>::
>>       Limit fetching to ancestor-chains not longer than n.
>> +     Specify 0 for infinite depth.
>
> Again '0 or "inf"'.

OK. "inf" was intented for user pleasure, which was the reason I did
not implement it in git-fetch-pack (a plumbing). But Jonathan was
brave enough to make OPT_INT_INF, I'll rebase this series on that
patch.
-- 
Duy