Merge branch 'so/log-diff-merge'
"git log" learned "--diff-merges=<style>" option, with an
associated configuration variable log.diffMerges.
* so/log-diff-merge:
doc/diff-options: document new --diff-merges features
diff-merges: introduce log.diffMerges config variable
diff-merges: adapt -m to enable default diff format
diff-merges: refactor set_diff_merges()
diff-merges: introduce --diff-merges=on
diff --git a/Documentation/config/log.txt b/Documentation/config/log.txt
index 208d5fd..456eb07 100644
--- a/Documentation/config/log.txt
+++ b/Documentation/config/log.txt
@@ -24,6 +24,11 @@
the config option can be overridden by the `--decorate-refs`
option.
+log.diffMerges::
+ Set default diff format to be used for merge commits. See
+ `--diff-merges` in linkgit:git-log[1] for details.
+ Defaults to `separate`.
+
log.follow::
If `true`, `git log` will act as if the `--follow` option was used when
a single <path> is given. This has the same limitations as `--follow`,
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index aa2b5c1..6d968b9 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -34,7 +34,7 @@
endif::git-format-patch[]
ifdef::git-log[]
---diff-merges=(off|none|first-parent|1|separate|m|combined|c|dense-combined|cc)::
+--diff-merges=(off|none|on|first-parent|1|separate|m|combined|c|dense-combined|cc)::
--no-diff-merges::
Specify diff format to be used for merge commits. Default is
{diff-merges-default} unless `--first-parent` is in use, in which case
@@ -45,17 +45,24 @@
Disable output of diffs for merge commits. Useful to override
implied value.
+
+--diff-merges=on:::
+--diff-merges=m:::
+-m:::
+ This option makes diff output for merge commits to be shown in
+ the default format. `-m` will produce the output only if `-p`
+ is given as well. The default format could be changed using
+ `log.diffMerges` configuration parameter, which default value
+ is `separate`.
++
--diff-merges=first-parent:::
--diff-merges=1:::
This option makes merge commits show the full diff with
respect to the first parent only.
+
--diff-merges=separate:::
---diff-merges=m:::
--m:::
This makes merge commits show the full diff with respect to
each of the parents. Separate log entry and diff is generated
- for each parent. `-m` doesn't produce any output without `-p`.
+ for each parent.
+
--diff-merges=combined:::
--diff-merges=c:::
diff --git a/builtin/log.c b/builtin/log.c
index 8acd285..6102893 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -481,6 +481,8 @@
decoration_style = 0; /* maybe warn? */
return 0;
}
+ if (!strcmp(var, "log.diffmerges"))
+ return diff_merges_config(value);
if (!strcmp(var, "log.showroot")) {
default_show_root = git_config_bool(var, value);
return 0;
diff --git a/diff-merges.c b/diff-merges.c
index 146bb50..f3a9dae 100644
--- a/diff-merges.c
+++ b/diff-merges.c
@@ -2,6 +2,11 @@
#include "revision.h"
+typedef void (*diff_merges_setup_func_t)(struct rev_info *);
+static void set_separate(struct rev_info *revs);
+
+static diff_merges_setup_func_t set_to_default = set_separate;
+
static void suppress(struct rev_info *revs)
{
revs->separate_merges = 0;
@@ -29,10 +34,10 @@
{
/*
* To "diff-index", "-m" means "match missing", and to the "log"
- * family of commands, it means "show full diff for merges". Set
+ * family of commands, it means "show default diff for merges". Set
* both fields appropriately.
*/
- set_separate(revs);
+ set_to_default(revs);
revs->match_missing = 1;
}
@@ -50,33 +55,52 @@
revs->dense_combined_merges = 1;
}
+static diff_merges_setup_func_t func_by_opt(const char *optarg)
+{
+ if (!strcmp(optarg, "off") || !strcmp(optarg, "none"))
+ return suppress;
+ if (!strcmp(optarg, "1") || !strcmp(optarg, "first-parent"))
+ return set_first_parent;
+ else if (!strcmp(optarg, "separate"))
+ return set_separate;
+ else if (!strcmp(optarg, "c") || !strcmp(optarg, "combined"))
+ return set_combined;
+ else if (!strcmp(optarg, "cc") || !strcmp(optarg, "dense-combined"))
+ return set_dense_combined;
+ else if (!strcmp(optarg, "m") || !strcmp(optarg, "on"))
+ return set_to_default;
+ return NULL;
+}
+
static void set_diff_merges(struct rev_info *revs, const char *optarg)
{
- if (!strcmp(optarg, "off") || !strcmp(optarg, "none")) {
- suppress(revs);
- /* Return early to leave revs->merges_need_diff unset */
- return;
- }
+ diff_merges_setup_func_t func = func_by_opt(optarg);
- if (!strcmp(optarg, "1") || !strcmp(optarg, "first-parent"))
- set_first_parent(revs);
- else if (!strcmp(optarg, "m") || !strcmp(optarg, "separate"))
- set_separate(revs);
- else if (!strcmp(optarg, "c") || !strcmp(optarg, "combined"))
- set_combined(revs);
- else if (!strcmp(optarg, "cc") || !strcmp(optarg, "dense-combined"))
- set_dense_combined(revs);
- else
+ if (!func)
die(_("unknown value for --diff-merges: %s"), optarg);
- /* The flag is cleared by set_xxx() functions, so don't move this up */
- revs->merges_need_diff = 1;
+ func(revs);
+
+ /* NOTE: the merges_need_diff flag is cleared by func() call */
+ if (func != suppress)
+ revs->merges_need_diff = 1;
}
/*
* Public functions. They are in the order they are called.
*/
+int diff_merges_config(const char *value)
+{
+ diff_merges_setup_func_t func = func_by_opt(value);
+
+ if (!func)
+ return -1;
+
+ set_to_default = func;
+ return 0;
+}
+
int diff_merges_parse_opts(struct rev_info *revs, const char **argv)
{
int argcount = 1;
diff --git a/diff-merges.h b/diff-merges.h
index 659467c..09d9a6c 100644
--- a/diff-merges.h
+++ b/diff-merges.h
@@ -9,6 +9,8 @@
struct rev_info;
+int diff_merges_config(const char *value);
+
int diff_merges_parse_opts(struct rev_info *revs, const char **argv);
void diff_merges_suppress(struct rev_info *revs);
diff --git a/t/t4013-diff-various.sh b/t/t4013-diff-various.sh
index 6cca8b8..87def81 100755
--- a/t/t4013-diff-various.sh
+++ b/t/t4013-diff-various.sh
@@ -452,6 +452,37 @@
diff-tree -R --stat --compact-summary initial mode
EOF
+test_expect_success 'log --diff-merges=on matches --diff-merges=separate' '
+ git log -p --diff-merges=separate master >result &&
+ process_diffs result >expected &&
+ git log -p --diff-merges=on master >result &&
+ process_diffs result >actual &&
+ test_cmp expected actual
+'
+
+test_expect_success 'deny wrong log.diffMerges config' '
+ test_config log.diffMerges wrong-value &&
+ test_expect_code 128 git log
+'
+
+test_expect_success 'git config log.diffMerges first-parent' '
+ git log -p --diff-merges=first-parent master >result &&
+ process_diffs result >expected &&
+ test_config log.diffMerges first-parent &&
+ git log -p --diff-merges=on master >result &&
+ process_diffs result >actual &&
+ test_cmp expected actual
+'
+
+test_expect_success 'git config log.diffMerges first-parent vs -m' '
+ git log -p --diff-merges=first-parent master >result &&
+ process_diffs result >expected &&
+ test_config log.diffMerges first-parent &&
+ git log -p -m master >result &&
+ process_diffs result >actual &&
+ test_cmp expected actual
+'
+
test_expect_success 'log -S requires an argument' '
test_must_fail git log -S
'
diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index 04ce884..4d732d6 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -2306,6 +2306,7 @@
test_completion "git config log.d" <<-\EOF
log.date Z
log.decorate Z
+ log.diffMerges Z
EOF
'
@@ -2327,6 +2328,7 @@
test_completion "git -c log.d" <<-\EOF
log.date=Z
log.decorate=Z
+ log.diffMerges=Z
EOF
'
@@ -2348,6 +2350,7 @@
test_completion "git clone --config=log.d" <<-\EOF
log.date=Z
log.decorate=Z
+ log.diffMerges=Z
EOF
'
