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diff: add diff.srcPrefix and diff.dstPrefix configuration variables

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Allow the default prefixes "a/" and "b/" to be tweaked by the
diff.srcPrefix and diff.dstPrefix configuration variables.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Peter Hutterer 2024-03-15 11:03:10 +10:00 committed by Junio C Hamano
parent 4f9b731bde
commit 7fdc265633
4 changed files with 56 additions and 4 deletions
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6
Documentation/config/diff.txt
View File

@ -111,6 +111,12 @@ diff.mnemonicPrefix::
diff.noprefix::
If set, 'git diff' does not show any source or destination prefix.
diff.srcPrefix::
If set, 'git diff' uses this source prefix. Defaults to "a/".
diff.dstPrefix::
If set, 'git diff' uses this destination prefix. Defaults to "b/".
diff.relative::
If set to 'true', 'git diff' does not show changes outside of the directory
and show pathnames relative to the current directory.

5
Documentation/diff-options.txt
View File

@ -865,8 +865,9 @@ endif::git-format-patch[]
--default-prefix::
Use the default source and destination prefixes ("a/" and "b/").
This is usually the default already, but may be used to override
config such as `diff.noprefix`.
This overrides configuration variables such as `diff.noprefix`,
`diff.srcPrefix`, `diff.dstPrefix`, and `diff.mnemonicPrefix`
(see `git-config`(1)).
--line-prefix=<prefix>::
Prepend an additional prefix to every line of output.

14
diff.c
View File

@ -62,6 +62,8 @@ static const char *diff_order_file_cfg;
int diff_auto_refresh_index = 1;
static int diff_mnemonic_prefix;
static int diff_no_prefix;
static const char *diff_src_prefix = "a/";
static const char *diff_dst_prefix = "b/";
static int diff_relative;
static int diff_stat_name_width;
static int diff_stat_graph_width;
@ -408,6 +410,12 @@ int git_diff_ui_config(const char *var, const char *value,
diff_no_prefix = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "diff.srcprefix")) {
return git_config_string(&diff_src_prefix, var, value);
}
if (!strcmp(var, "diff.dstprefix")) {
return git_config_string(&diff_dst_prefix, var, value);
}
if (!strcmp(var, "diff.relative")) {
diff_relative = git_config_bool(var, value);
return 0;
@ -3425,8 +3433,8 @@ void diff_set_noprefix(struct diff_options *options)
void diff_set_default_prefix(struct diff_options *options)
{
options->a_prefix = "a/";
options->b_prefix = "b/";
options->a_prefix = diff_src_prefix;
options->b_prefix = diff_dst_prefix;
}
struct userdiff_driver *get_textconv(struct repository *r,
@ -5362,6 +5370,8 @@ static int diff_opt_default_prefix(const struct option *opt,
BUG_ON_OPT_NEG(unset);
BUG_ON_OPT_ARG(optarg);
diff_src_prefix = "a/";
diff_dst_prefix = "b/";
diff_set_default_prefix(options);
return 0;
}

35
t/t4013-diff-various.sh
View File

@ -663,6 +663,41 @@ test_expect_success 'diff --default-prefix overrides diff.mnemonicprefix' '
check_prefix actual a/file0 b/file0
'
test_expect_success 'diff respects diff.srcprefix' '
git -c diff.srcprefix=x/ diff >actual &&
check_prefix actual x/file0 b/file0
'
test_expect_success 'diff respects diff.dstprefix' '
git -c diff.dstprefix=y/ diff >actual &&
check_prefix actual a/file0 y/file0
'
test_expect_success 'diff --src-prefix overrides diff.srcprefix' '
git -c diff.srcprefix=y/ diff --src-prefix=z/ >actual &&
check_prefix actual z/file0 b/file0
'
test_expect_success 'diff --dst-prefix overrides diff.dstprefix' '
git -c diff.dstprefix=y/ diff --dst-prefix=z/ >actual &&
check_prefix actual a/file0 z/file0
'
test_expect_success 'diff.{src,dst}prefix ignored with diff.noprefix' '
git -c diff.dstprefix=y/ -c diff.srcprefix=x/ -c diff.noprefix diff >actual &&
check_prefix actual file0 file0
'
test_expect_success 'diff.{src,dst}prefix ignored with diff.mnemonicprefix' '
git -c diff.dstprefix=x/ -c diff.srcprefix=y/ -c diff.mnemonicprefix diff >actual &&
check_prefix actual i/file0 w/file0
'
test_expect_success 'diff.{src,dst}prefix ignored with --default-prefix' '
git -c diff.dstprefix=x/ -c diff.srcprefix=y/ diff --default-prefix >actual &&
check_prefix actual a/file0 b/file0
'
test_expect_success 'diff --no-renames cannot be abbreviated' '
test_expect_code 129 git diff --no-rename >actual 2>error &&
test_must_be_empty actual &&