[PATCH] fetch: add a config option to always use the depth argument

[Stefan Beller <sbeller@google.com>]

When having a repository, which deals with large amounts of data, i.e.
graphics, music, films, you may want to keep the git directory at
the smallest size possible.

The depth option helped us in achieving this goal by removing the sizable
history and just keep recent history around. In the case of having large
amounts of data around, you probably want to use the depth option at any
fetch you do, so it would be convenient to have an option for this.

Change-Id: I45a569239639f20e24fbae32fb2046bc478c5f07
Signed-off-by: Stefan Beller <sbeller@google.com>
---
 Documentation/config.txt        | 6 ++++++
 Documentation/fetch-options.txt | 2 ++
 builtin/fetch.c                 | 5 +++++
 3 files changed, 13 insertions(+)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index 9220725..418e21f 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1106,6 +1106,12 @@ fetch.prune::
 	If true, fetch will automatically behave as if the `--prune`
 	option was given on the command line.  See also `remote.<name>.prune`.
 
+fetch.depth::
+	If set, fetch will automatically behave as if the `--depth`
+	option was given on the command line.  This allows users to keep
+	the git directory at low space requirements, and thus comes in handy
+	for users with large binary files in the repository.
+
 format.attach::
 	Enable multipart/mixed attachments as the default for
 	'format-patch'.  The value can also be a double quoted string
diff --git a/Documentation/fetch-options.txt b/Documentation/fetch-options.txt
index b09a783..81131d0 100644
--- a/Documentation/fetch-options.txt
+++ b/Documentation/fetch-options.txt
@@ -12,6 +12,8 @@
 	`git clone` with `--depth=<depth>` option (see linkgit:git-clone[1])
 	to the specified number of commits from the tip of each remote
 	branch history. Tags for the deepened commits are not fetched.
+	You can configure git to always use the depth option, see
+	`fetch.depth` in linkgit:git-config[1]
 
 --unshallow::
 	If the source repository is complete, convert a shallow
diff --git a/builtin/fetch.c b/builtin/fetch.c
index 7b84d35..30fa15b 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -68,6 +68,11 @@ static int git_fetch_config(const char *k, const char *v, void *cb)
 		fetch_prune_config = git_config_bool(k, v);
 		return 0;
 	}
+	if (!strcmp(k, "fetch.depth")) {
+		if (git_config_string(&depth, k, v))
+			return -1;
+		return 0;
+	}
 	return git_default_config(k, v, cb);
 }
 
-- 
2.1.2