On Thu, Mar 08, 2018 at 07:23:00PM -0500, Jeremy Bicha wrote:
> Use Case
> ======
> Jeremy is a developer for Debian and Ubuntu. The same repository is
> used for both Debian and Ubuntu packaging but with different branches.
> For commits to the debian/master branch, Jeremy wants to use his
> @debian.org email address. For commits to the ubuntu/master branch,
> Jeremy wants to use his @ubuntu.com email.
>
> Proposal
> =======
> The includeIf feature of git-config could be extended to offer a
> gitbranch conditional include in addition to the gitdir conditional
> include it already offers.
Interesting. It looks quite simple to do this. My prototype looks like
this.
-- 8< --
Subject: [PATCH] config: support conditional include by matching ref pattern
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
Documentation/config.txt | 12 ++++++++++++
config.c | 30 ++++++++++++++++++++++++++++++
t/t1305-config-include.sh | 26 ++++++++++++++++++++++++++
3 files changed, 68 insertions(+)
diff --git a/Documentation/config.txt b/Documentation/config.txt
index ce9102cea8..4e8fb6d99c 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -143,6 +143,18 @@ refer to linkgit:gitignore[5] for details. For convenience:
This is the same as `gitdir` except that matching is done
case-insensitively (e.g. on case-insensitive file sytems)
+`ref`::
+ The data that follows the keyword `ref:` is used as a glob
+ pattern that matches against the current branch. `*` in the
+ pattern does not match `/` and `**` matches multiple levels,
+ the same as .gitignore syntax. The branch is a full reference
+ (i.e. with `refs/heads/` prefix). If HEAD is detached, the
+ pattern will be matched against the value "HEAD".
+
+`ref/i`::
+ This is the same as `ref` except that matching is done
+ case-insensitively
+
A few more notes on matching via `gitdir` and `gitdir/i`:
* Symlinks in `$GIT_DIR` are not resolved before matching.
diff --git a/config.c b/config.c
index b0c20e6cb8..72ff2da667 100644
--- a/config.c
+++ b/config.c
@@ -16,6 +16,7 @@
#include "string-list.h"
#include "utf8.h"
#include "dir.h"
+#include "refs.h"
struct config_source {
struct config_source *prev;
@@ -202,6 +203,31 @@ static int prepare_include_condition_pattern(struct strbuf *pat)
return prefix;
}
+static int include_by_ref(const struct config_options *opts,
+ const char *cond, size_t cond_len, int icase)
+{
+ struct strbuf pattern = STRBUF_INIT;
+ char *branch;
+ unsigned flags = WM_PATHNAME;
+ int ret;
+
+ if (!opts->git_dir)
+ return 0;
+
+ branch = resolve_refdup("HEAD", 0, NULL, NULL);
+ if (!branch)
+ return 0;
+
+ if (icase)
+ flags |= WM_CASEFOLD;
+ strbuf_add(&pattern, cond, cond_len);
+ ret = !wildmatch(pattern.buf, branch, flags);
+
+ free(branch);
+ strbuf_release(&pattern);
+ return ret;
+}
+
static int include_by_gitdir(const struct config_options *opts,
const char *cond, size_t cond_len, int icase)
{
@@ -268,6 +294,10 @@ static int include_condition_is_true(const struct config_options *opts,
return include_by_gitdir(opts, cond, cond_len, 0);
else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
return include_by_gitdir(opts, cond, cond_len, 1);
+ else if (skip_prefix_mem(cond, cond_len, "ref:", &cond, &cond_len))
+ return include_by_ref(opts, cond, cond_len, 0);
+ else if (skip_prefix_mem(cond, cond_len, "ref/i:", &cond, &cond_len))
+ return include_by_ref(opts, cond, cond_len, 1);
/* unknown conditionals are always false */
return 0;
diff --git a/t/t1305-config-include.sh b/t/t1305-config-include.sh
index d9d2f545a4..27ecfc74b7 100755
--- a/t/t1305-config-include.sh
+++ b/t/t1305-config-include.sh
@@ -296,6 +296,32 @@ test_expect_success SYMLINKS 'conditional include, gitdir matching symlink, icas
)
'
+test_expect_success 'conditional include by refs' '
+ git init inc-by-ref &&
+ (
+ check() {
+ echo "ref: $1" >.git/HEAD &&
+ echo "[includeIf \"ref:$2\"]path=bar8" >.git/config &&
+ git config test.var >actual &&
+ test_cmp expect actual
+ }
+ cd inc-by-ref &&
+ echo "[test]var=matched" >.git/bar8 &&
+ echo matched >expect &&
+
+ check refs/heads/foo refs/heads/foo &&
+ check refs/heads/foo "refs/heads/*" &&
+ check refs/heads/foo "refs/heads/f*" &&
+ check refs/heads/deep/in/foo "refs/heads/**/foo" &&
+
+ test_commit one &&
+ git checkout --detach &&
+ echo "[includeIf \"ref:HEAD\"]path=bar8" >.git/config &&
+ git config test.var >actual &&
+ test_cmp expect actual
+ )
+'
+
test_expect_success 'include cycles are detected' '
cat >.gitconfig <<-\EOF &&
[test]value = gitconfig
--
2.16.2.903.gd04caf5039
-- 8< --
