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diff: add config option relative
The `diff.relative` boolean option set to `true` shows only changes in the current directory/value specified by the `path` argument of the `relative` option and shows pathnames relative to the aforementioned directory. Teach `--no-relative` to override earlier `--relative` Add for git-format-patch(1) options documentation `--relative` and `--no-relative` Signed-off-by: Laurent Arnoud <laurent@spkdev.net> Acked-by: Đoàn Trần Công Danh <congdanhqx@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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‎Documentation/config/diff.txt‎

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -105,6 +105,10 @@ diff.mnemonicPrefix::
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diff.noprefix::
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If set, 'git diff' does not show any source or destination prefix.
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108+
diff.relative::
109+
If set to 'true', 'git diff' does not show changes outside of the directory
110+
and show pathnames relative to the current directory.
111+
108112
diff.orderFile::
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File indicating how to order files within a diff.
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See the '-O' option to linkgit:git-diff[1] for details.

‎Documentation/diff-options.txt‎

Lines changed: 4 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -643,15 +643,18 @@ ifndef::git-format-patch[]
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-R::
644644
Swap two inputs; that is, show differences from index or
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on-disk file to tree contents.
646+
endif::git-format-patch[]
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--relative[=<path>]::
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--no-relative::
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When run from a subdirectory of the project, it can be
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told to exclude changes outside the directory and show
650652
pathnames relative to it with this option. When you are
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not in a subdirectory (e.g. in a bare repository), you
652654
can name which subdirectory to make the output relative
653655
to by giving a <path> as an argument.
654-
endif::git-format-patch[]
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`--no-relative` can be used to countermand both `diff.relative` config
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option and previous `--relative`.
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-a::
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--text::

‎diff.c‎

Lines changed: 8 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -48,6 +48,7 @@ static const char *diff_order_file_cfg;
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int diff_auto_refresh_index = 1;
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static int diff_mnemonic_prefix;
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static int diff_no_prefix;
51+
static int diff_relative;
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static int diff_stat_graph_width;
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static int diff_dirstat_permille_default = 30;
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static struct diff_options default_diff_options;
@@ -386,6 +387,10 @@ int git_diff_ui_config(const char *var, const char *value, void *cb)
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diff_no_prefix = git_config_bool(var, value);
387388
return 0;
388389
}
390+
if (!strcmp(var, "diff.relative")) {
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diff_relative = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "diff.statgraphwidth")) {
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diff_stat_graph_width = git_config_int(var, value);
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return 0;
@@ -4538,6 +4543,7 @@ void repo_diff_setup(struct repository *r, struct diff_options *options)
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options->interhunkcontext = diff_interhunk_context_default;
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options->ws_error_highlight = ws_error_highlight_default;
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options->flags.rename_empty = 1;
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options->flags.relative_name = diff_relative;
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options->objfind = NULL;
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/* pathchange left =NULL by default */
@@ -5195,8 +5201,7 @@ static int diff_opt_relative(const struct option *opt,
51955201
{
51965202
struct diff_options *options = opt->value;
51975203

5198-
BUG_ON_OPT_NEG(unset);
5199-
options->flags.relative_name = 1;
5204+
options->flags.relative_name = !unset;
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if (arg)
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options->prefix = arg;
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return 0;
@@ -5492,7 +5497,7 @@ static void prep_parse_options(struct diff_options *options)
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OPT_GROUP(N_("Other diff options")),
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OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
54945499
N_("when run from subdir, exclude changes outside and show relative paths"),
5495-
PARSE_OPT_NONEG | PARSE_OPT_OPTARG,
5500+
PARSE_OPT_OPTARG,
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diff_opt_relative),
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OPT_BOOL('a', "text", &options->flags.text,
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N_("treat all files as text")),

‎t/t4014-format-patch.sh‎

Lines changed: 13 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1602,6 +1602,19 @@ test_expect_success 'format patch ignores color.ui' '
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test_cmp expect actual
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'
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test_expect_success 'format patch respects diff.relative' '
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rm -rf subdir &&
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mkdir subdir &&
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echo other content >subdir/file2 &&
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git add subdir/file2 &&
1610+
git commit -F msg &&
1611+
test_unconfig diff.relative &&
1612+
git format-patch --relative=subdir --stdout -1 >expect &&
1613+
test_config diff.relative true &&
1614+
git -C subdir format-patch --stdout -1 >actual &&
1615+
test_cmp expect actual
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'
1617+
16051618
test_expect_success 'cover letter with invalid --cover-from-description and config' '
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test_config branch.rebuild-1.description "config subject
16071620

‎t/t4045-diff-relative.sh‎

Lines changed: 79 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,8 @@ test_expect_success 'setup' '
88
echo content >file1 &&
99
mkdir subdir &&
1010
echo other content >subdir/file2 &&
11-
blob=$(git hash-object subdir/file2) &&
11+
blob_file1=$(git hash-object file1) &&
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blob_file2=$(git hash-object subdir/file2) &&
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git add . &&
1314
git commit -m one
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'
@@ -18,7 +19,7 @@ check_diff () {
1819
shift
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expect=$1
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shift
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short_blob=$(git rev-parse --short $blob)
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short_blob=$(git rev-parse --short $blob_file2)
2223
cat >expected <<-EOF
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diff --git a/$expect b/$expect
2425
new file mode 100644
@@ -70,7 +71,7 @@ check_raw () {
7071
expect=$1
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shift
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cat >expected <<-EOF
73-
:000000 100644 $ZERO_OID $blob A $expect
74+
:000000 100644 $ZERO_OID $blob_file2 A $expect
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EOF
7576
test_expect_success "--raw $*" "
7677
git -C '$dir' diff --no-abbrev --raw $* HEAD^ >actual &&
@@ -86,4 +87,79 @@ do
8687
check_$type . dir/file2 --relative=sub
8788
done
8889

90+
check_diff_relative_option () {
91+
dir=$1
92+
shift
93+
expect=$1
94+
shift
95+
relative_opt=$1
96+
shift
97+
test_expect_success "config diff.relative $relative_opt -p $*" "
98+
short_blob=\$(git rev-parse --short $blob_file2) &&
99+
cat >expected <<-EOF &&
100+
diff --git a/$expect b/$expect
101+
new file mode 100644
102+
index 0000000..\$short_blob
103+
--- /dev/null
104+
+++ b/$expect
105+
@@ -0,0 +1 @@
106+
+other content
107+
EOF
108+
test_config -C $dir diff.relative $relative_opt &&
109+
git -C '$dir' diff -p $* HEAD^ >actual &&
110+
test_cmp expected actual
111+
"
112+
}
113+
114+
check_diff_no_relative_option () {
115+
dir=$1
116+
shift
117+
expect=$1
118+
shift
119+
relative_opt=$1
120+
shift
121+
test_expect_success "config diff.relative $relative_opt -p $*" "
122+
short_blob_file1=\$(git rev-parse --short $blob_file1) &&
123+
short_blob_file2=\$(git rev-parse --short $blob_file2) &&
124+
cat >expected <<-EOF &&
125+
diff --git a/file1 b/file1
126+
new file mode 100644
127+
index 0000000..\$short_blob_file1
128+
--- /dev/null
129+
+++ b/file1
130+
@@ -0,0 +1 @@
131+
+content
132+
diff --git a/$expect b/$expect
133+
new file mode 100644
134+
index 0000000..\$short_blob_file2
135+
--- /dev/null
136+
+++ b/$expect
137+
@@ -0,0 +1 @@
138+
+other content
139+
EOF
140+
test_config -C $dir diff.relative $relative_opt &&
141+
git -C '$dir' diff -p $* HEAD^ >actual &&
142+
test_cmp expected actual
143+
"
144+
}
145+
146+
check_diff_no_relative_option . subdir/file2 false
147+
check_diff_no_relative_option . subdir/file2 true --no-relative
148+
check_diff_no_relative_option . subdir/file2 false --no-relative
149+
check_diff_no_relative_option subdir subdir/file2 false
150+
check_diff_no_relative_option subdir subdir/file2 true --no-relative
151+
check_diff_no_relative_option subdir subdir/file2 false --no-relative
152+
153+
check_diff_relative_option . file2 false --relative=subdir/
154+
check_diff_relative_option . file2 false --relative=subdir
155+
check_diff_relative_option . file2 true --relative=subdir/
156+
check_diff_relative_option . file2 true --relative=subdir
157+
check_diff_relative_option subdir file2 false --relative
158+
check_diff_relative_option subdir file2 true --relative
159+
check_diff_relative_option subdir file2 true
160+
check_diff_relative_option subdir file2 false --no-relative --relative
161+
check_diff_relative_option subdir file2 true --no-relative --relative
162+
check_diff_relative_option . file2 false --no-relative --relative=subdir
163+
check_diff_relative_option . file2 true --no-relative --relative=subdir
164+
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test_done

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