With the --dirty option, git describe works on HEAD but append "-dirty"
if the working tree is dirty. If the working tree is clean, nothing
is appended.
$ git describe --dirty
v1.6.5-15-gc274db7
$ echo >> Makefile
$ git describe --dirty
v1.6.5-15-gc274db7-dirty
--dirty can also be used to specify what is append if the working
tree is dirty.
$ git describe --dirty=.mod
v1.6.5-15-gc274db7.mod
Many build scripts use `git describe` to produce a version number based
on the description of HEAD (on which is based the working tree) + saying
that if the working tree is dirty or no.
This patch helps the writing of such scripts since `git describe --dirty`
do directly the intended thing.
Alternatives specifications:
1 Describe the working tree by default and describe HEAD only if "HEAD"
is explicitly specified
Pro: does the right thing by default (both for users and for scripts)
Pro: is coherent with other git commands that works on the working tree
by default
Con: breaks existing scripts (since the world is not ideal)
2 Use --worktree instead of --dirty
Pro: does what it says: "git describe --worktree" will describe the
working three
Con: is incoherent with other commands that do not require a --worktree
option to work on the working tree
Con: unusable with an optional value: "git describe --worktree=.mod"
is quite unintuitive.
3 Use --dirty as in this patch
Pro: make sense to specify an optional value (what the dirty mark is)
Pro: do not have any of the big cons of previous alternatives
* does not break scripts
* is not inconsistent with other git commands
Pro: has an easy fallback to alternative 1 if the world become suddenly
ideal, or at least allows some kind of future transition plan if
people *really* bother:
1- ask that scripts use either "git describe HEAD" or
"git describe --dirty" (no more "git describe")
2- change default
Once the transition is done, the role of the --dirty option will
just be the way to specify an alternative mark (and a noop if alone)
Signed-off-by: Jean Privat <jean@xxxxxxxxx>
---
Changes since v2.5:
Use test_must_fail
Changes since v2:
No more line breaks (I hope)
Changes since v1:
use --dirty (alternative 3) instead of defaulting on workdir (alternative 1)
---
Documentation/git-describe.txt | 6 ++++++
builtin-describe.c | 25 ++++++++++++++++++++++++-
t/t6120-describe.sh | 14 ++++++++++++++
3 files changed, 44 insertions(+), 1 deletions(-)
diff --git a/Documentation/git-describe.txt b/Documentation/git-describe.txt
index b231dbb..5253d86 100644
--- a/Documentation/git-describe.txt
+++ b/Documentation/git-describe.txt
@@ -9,6 +9,7 @@ git-describe - Show the most recent tag that is reachable from a commit
SYNOPSIS
--------
'git describe' [--all] [--tags] [--contains] [--abbrev=<n>] <committish>...
+'git describe' [--all] [--tags] [--contains] [--abbrev=<n>] --dirty[=<mark>]
DESCRIPTION
-----------
@@ -27,6 +28,11 @@ OPTIONS
<committish>...::
Committish object names to describe.
+--dirty[=<mark>]::
+ Describe the working tree.
+ It means describe HEAD and appends <mark> (`-dirty` by
+ default) if the working tree is dirty.
+
--all::
Instead of using only the annotated tags, use any ref
found in `.git/refs/`. This option enables matching
diff --git a/builtin-describe.c b/builtin-describe.c
index df67a73..84af981 100644
--- a/builtin-describe.c
+++ b/builtin-describe.c
@@ -5,12 +5,14 @@
#include "builtin.h"
#include "exec_cmd.h"
#include "parse-options.h"
+#include "diff.h"
#define SEEN (1u<<0)
#define MAX_TAGS (FLAG_BITS - 1)
static const char * const describe_usage[] = {
"git describe [options] <committish>*",
+ "git describe [options] --dirty",
NULL
};
@@ -23,6 +25,13 @@ static int max_candidates = 10;
static int found_names;
static const char *pattern;
static int always;
+static const char *dirty;
+
+/* diff-index command arguments to check if working tree is dirty. */
+static const char *diff_index_args[] = {
+ "diff-index", "--quiet", "HEAD", "--", NULL
+};
+
struct commit_name {
struct tag *tag;
@@ -208,6 +217,8 @@ static void describe(const char *arg, int last_one)
display_name(n);
if (longformat)
show_suffix(0, n->tag ? n->tag->tagged->sha1 : sha1);
+ if (dirty)
+ printf("%s", dirty);
printf("\n");
return;
}
@@ -265,7 +276,10 @@ static void describe(const char *arg, int last_one)
if (!match_cnt) {
const unsigned char *sha1 = cmit->object.sha1;
if (always) {
- printf("%s\n", find_unique_abbrev(sha1, abbrev));
+ printf("%s", find_unique_abbrev(sha1, abbrev));
+ if (dirty)
+ printf("%s", dirty);
+ printf("\n");
return;
}
die("cannot describe '%s'", sha1_to_hex(sha1));
@@ -300,6 +314,8 @@ static void describe(const char *arg, int last_one)
display_name(all_matches[0].name);
if (abbrev)
show_suffix(all_matches[0].depth, cmit->object.sha1);
+ if (dirty)
+ printf("%s", dirty);
printf("\n");
if (!last_one)
@@ -324,6 +340,9 @@ int cmd_describe(int argc, const char **argv, const char *prefix)
"only consider tags matching <pattern>"),
OPT_BOOLEAN(0, "always", &always,
"show abbreviated commit object as fallback"),
+ {OPTION_STRING, 0, "dirty", &dirty, "mark",
+ "append <mark> on dirty working tree (default: \"-dirty\")",
+ PARSE_OPT_OPTARG, NULL, "-dirty"},
OPT_END(),
};
@@ -360,7 +379,11 @@ int cmd_describe(int argc, const char **argv, const char *prefix)
}
if (argc == 0) {
+ if (dirty && !cmd_diff_index(ARRAY_SIZE(diff_index_args) - 1, diff_index_args, prefix))
+ dirty = NULL;
describe("HEAD", 1);
+ } else if (dirty) {
+ die("--dirty is incompatible with committishes");
} else {
while (argc-- > 0) {
describe(*argv++, argc == 0);
diff --git a/t/t6120-describe.sh b/t/t6120-describe.sh
index 8c7e081..e061177 100755
--- a/t/t6120-describe.sh
+++ b/t/t6120-describe.sh
@@ -123,6 +123,20 @@ test_expect_success 'rename tag Q back to A' '
test_expect_success 'pack tag refs' 'git pack-refs'
check_describe A-* HEAD
+check_describe "A-*[0-9a-f]" --dirty
+
+test_expect_success 'set-up dirty working tree' '
+ echo >>file
+'
+
+check_describe "A-*[0-9a-f]-dirty" --dirty
+
+check_describe "A-*[0-9a-f].mod" --dirty=.mod
+
+test_expect_success 'describe --dirty HEAD' '
+ test_must_fail git describe --dirty HEAD
+'
+
test_expect_success 'set-up matching pattern tests' '
git tag -a -m test-annotated test-annotated &&
echo >>file &&
--
1.6.5
--
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