Introduce a diff.submodule configuration variable corresponding to the
'--submodule' command-line option of 'git diff'.
Signed-off-by: Ramkumar Ramachandra <artagnon@xxxxxxxxx>
---
Documentation/diff-config.txt | 7 ++++++
Documentation/diff-options.txt | 3 +-
cache.h | 1 +
diff.c | 40 ++++++++++++++++++++++++++++++++++---
t/t4041-diff-submodule-option.sh | 30 +++++++++++++++++++++++++++-
5 files changed, 75 insertions(+), 6 deletions(-)
diff --git a/Documentation/diff-config.txt b/Documentation/diff-config.txt
index decd370..89dd634 100644
--- a/Documentation/diff-config.txt
+++ b/Documentation/diff-config.txt
@@ -107,6 +107,13 @@ diff.suppressBlankEmpty::
A boolean to inhibit the standard behavior of printing a space
before each empty output line. Defaults to false.
+diff.submodule::
+ Specify the format in which differences in submodules are
+ shown. The "log" format lists the commits in the range like
+ linkgit:git-submodule[1] `summary` does. The "short" format
+ format just shows the names of the commits at the beginning
+ and end of the range. Defaults to short.
+
diff.wordRegex::
A POSIX Extended Regular Expression used to determine what is a "word"
when performing word-by-word difference calculations. Character
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index cf4b216..f4f7e25 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -170,7 +170,8 @@ any of those replacements occurred.
the commits in the range like linkgit:git-submodule[1] `summary` does.
Omitting the `--submodule` option or specifying `--submodule=short`,
uses the 'short' format. This format just shows the names of the commits
- at the beginning and end of the range.
+ at the beginning and end of the range. Can be tweaked via the
+ `diff.submodule` configuration variable.
--color[=<when>]::
Show colored diff.
diff --git a/cache.h b/cache.h
index dbd8018..4d9dbc7 100644
--- a/cache.h
+++ b/cache.h
@@ -1221,6 +1221,7 @@ int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
/* diff.c */
extern int diff_auto_refresh_index;
+extern const char *submodule_format_cfg;
/* match-trees.c */
void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
diff --git a/diff.c b/diff.c
index e89a201..b486070 100644
--- a/diff.c
+++ b/diff.c
@@ -30,6 +30,7 @@ static int diff_use_color_default = -1;
static int diff_context_default = 3;
static const char *diff_word_regex_cfg;
static const char *external_diff_cmd_cfg;
+const char *submodule_format_cfg;
int diff_auto_refresh_index = 1;
static int diff_mnemonic_prefix;
static int diff_no_prefix;
@@ -123,6 +124,20 @@ static int parse_dirstat_params(struct diff_options *options, const char *params
return ret;
}
+static int parse_submodule_params(struct diff_options *options, const char *value,
+ struct strbuf *errmsg)
+{
+ if (!strcmp(value, "log"))
+ DIFF_OPT_SET(options, SUBMODULE_LOG);
+ else if (!strcmp(value, "short"))
+ DIFF_OPT_CLR(options, SUBMODULE_LOG);
+ else {
+ strbuf_addf(errmsg, _("'%s'"), value);
+ return 1;
+ }
+ return 0;
+}
+
static int git_config_rename(const char *var, const char *value)
{
if (!value)
@@ -223,6 +238,15 @@ int git_diff_basic_config(const char *var, const char *value, void *cb)
return 0;
}
+ if (!strcmp(var, "diff.submodule")) {
+ struct strbuf errmsg = STRBUF_INIT;
+ if (parse_submodule_params(&default_diff_options, value, &errmsg))
+ warning(_("Unknown value for 'diff.submodule' config variable: %s"),
+ errmsg.buf);
+ strbuf_release(&errmsg);
+ return 0;
+ }
+
if (!prefixcmp(var, "submodule."))
return parse_submodule_config_option(var, value);
@@ -3475,6 +3499,16 @@ static int parse_dirstat_opt(struct diff_options *options, const char *params)
return 1;
}
+static int parse_submodule_opt(struct diff_options *options, const char *params)
+{
+ struct strbuf errmsg = STRBUF_INIT;
+ if (parse_submodule_params(options, params, &errmsg))
+ die(_("Failed to parse --submodule option parameter: %s"),
+ errmsg.buf);
+ strbuf_release(&errmsg);
+ return 1;
+}
+
int diff_opt_parse(struct diff_options *options, const char **av, int ac)
{
const char *arg = av[0];
@@ -3655,10 +3689,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
handle_ignore_submodules_arg(options, arg + 20);
} else if (!strcmp(arg, "--submodule"))
DIFF_OPT_SET(options, SUBMODULE_LOG);
- else if (!prefixcmp(arg, "--submodule=")) {
- if (!strcmp(arg + 12, "log"))
- DIFF_OPT_SET(options, SUBMODULE_LOG);
- }
+ else if (!prefixcmp(arg, "--submodule="))
+ return parse_submodule_opt(options, arg + 12);
/* misc options */
else if (!strcmp(arg, "-z"))
diff --git a/t/t4041-diff-submodule-option.sh b/t/t4041-diff-submodule-option.sh
index 6c01d0c..e401814 100755
--- a/t/t4041-diff-submodule-option.sh
+++ b/t/t4041-diff-submodule-option.sh
@@ -33,6 +33,7 @@ test_create_repo sm1 &&
add_file . foo >/dev/null
head1=$(add_file sm1 foo1 foo2)
+fullhead1=$(cd sm1; git rev-list --max-count=1 $head1)
test_expect_success 'added submodule' "
git add sm1 &&
@@ -43,6 +44,34 @@ EOF
test_cmp expected actual
"
+test_expect_success 'added submodule, set diff.submodule' "
+ git config diff.submodule log &&
+ git add sm1 &&
+ git diff --cached >actual &&
+ cat >expected <<-EOF &&
+Submodule sm1 0000000...$head1 (new submodule)
+EOF
+ git config --unset diff.submodule &&
+ test_cmp expected actual
+"
+
+test_expect_success '--submodule=short overrides diff.submodule' "
+ git config diff.submodule log &&
+ git add sm1 &&
+ git diff --submodule=short --cached >actual &&
+ cat >expected <<-EOF &&
+diff --git a/sm1 b/sm1
+new file mode 160000
+index 0000000..a2c4dab
+--- /dev/null
++++ b/sm1
+@@ -0,0 +1 @@
++Subproject commit $fullhead1
+EOF
+ git config --unset diff.submodule &&
+ test_cmp expected actual
+"
+
commit_file sm1 &&
head2=$(add_file sm1 foo3)
@@ -73,7 +102,6 @@ EOF
test_cmp expected actual
"
-fullhead1=$(cd sm1; git rev-list --max-count=1 $head1)
fullhead2=$(cd sm1; git rev-list --max-count=1 $head2)
test_expect_success 'modified submodule(forward) --submodule=short' "
git diff --submodule=short >actual &&
--
1.7.8.1.362.g5d6df.dirty
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