diff: add interhunk context config option

The --inter-hunk-context= option was added in commit 6d0e674a5754
("diff: add option to show context between close hunks"). This patch
allows configuring a default for this option.

Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/diff-config.txt b/Documentation/diff-config.txt
index d8570f2a75096c07d7045ddfba7f1e2e6396d000..15521f5191b6fdba66c2d3d4f92491dd8c4524f3 100644 (file)
--- a/Documentation/diff-config.txt
+++ b/Documentation/diff-config.txt
@@ -60,6 +60,12 @@ diff.context::
        Generate diffs with <n> lines of context instead of the default
        of 3. This value is overridden by the -U option.
 
+diff.interHunkContext::
+       Show the context between diff hunks, up to the specified number
+       of lines, thereby fusing the hunks that are close to each other.
+       This value serves as the default for the `--inter-hunk-context`
+       command line option.
+
 diff.external::
        If this config variable is set, diff generation is not
        performed using the internal diff machinery, but using the

diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index e6215c372c3c3c876125c8ac363a446fd840e112..a219aa290726d504e7b4c7ec0a3051e091b5445b 100644 (file)
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -511,6 +511,8 @@ endif::git-format-patch[]
 --inter-hunk-context=<lines>::
        Show the context between diff hunks, up to the specified number
        of lines, thereby fusing hunks that are close to each other.
+       Defaults to `diff.interHunkContext` or 0 if the config option
+       is unset.
 
 -W::
 --function-context::

diff --git a/diff.c b/diff.c
index e2eb6d66a9a633e699398146e37dcbcc0b7ec81f..f08cd8e033d104253a4b120f70cb188e39ef9aee 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -32,6 +32,7 @@ static int diff_rename_limit_default = 400;
 static int diff_suppress_blank_empty;
 static int diff_use_color_default = -1;
 static int diff_context_default = 3;
+static int diff_interhunk_context_default;
 static const char *diff_word_regex_cfg;
 static const char *external_diff_cmd_cfg;
 static const char *diff_order_file_cfg;
@@ -239,6 +240,12 @@ int git_diff_ui_config(const char *var, const char *value, void *cb)
                        return -1;
                return 0;
        }
+       if (!strcmp(var, "diff.interhunkcontext")) {
+               diff_interhunk_context_default = git_config_int(var, value);
+               if (diff_interhunk_context_default < 0)
+                       return -1;
+               return 0;
+       }
        if (!strcmp(var, "diff.renames")) {
                diff_detect_rename_default = git_config_rename(var, value);
                return 0;
@@ -3362,6 +3369,7 @@ void diff_setup(struct diff_options *options)
        options->rename_limit = -1;
        options->dirstat_permille = diff_dirstat_permille_default;
        options->context = diff_context_default;
+       options->interhunkcontext = diff_interhunk_context_default;
        options->ws_error_highlight = ws_error_highlight_default;
        DIFF_OPT_SET(options, RENAME_EMPTY);
 

diff --git a/t/t4032-diff-inter-hunk-context.sh b/t/t4032-diff-inter-hunk-context.sh
index e4e3e28fc788fd16c73298a0c385f1b39994941e..bada0cbd32f76418a76702fbbd5143004876d074 100755 (executable)
--- a/t/t4032-diff-inter-hunk-context.sh
+++ b/t/t4032-diff-inter-hunk-context.sh
@@ -16,11 +16,15 @@ f() {
 }
 
 t() {
+       use_config=
+       git config --unset diff.interHunkContext
+
        case $# in
        4) hunks=$4; cmd="diff -U$3";;
        5) hunks=$5; cmd="diff -U$3 --inter-hunk-context=$4";;
+       6) hunks=$5; cmd="diff -U$3"; git config diff.interHunkContext $4; use_config="(diff.interHunkContext=$4) ";;
        esac
-       label="$cmd, $1 common $2"
+       label="$use_config$cmd, $1 common $2"
        file=f$1
        expected=expected.$file.$3.$hunks
 
@@ -89,4 +93,25 @@ t 9 lines    3               2
 t 9 lines      3       2       2
 t 9 lines      3       3       1
 
+#                                      use diff.interHunkContext?
+t 1 line       0       0       2       config
+t 1 line       0       1       1       config
+t 1 line       0       2       1       config
+t 9 lines      3       3       1       config
+t 2 lines      0       0       2       config
+t 2 lines      0       1       2       config
+t 2 lines      0       2       1       config
+t 3 lines      1       0       2       config
+t 3 lines      1       1       1       config
+t 3 lines      1       2       1       config
+t 9 lines      3       2       2       config
+t 9 lines      3       3       1       config
+
+test_expect_success 'diff.interHunkContext invalid' '
+       git config diff.interHunkContext asdf &&
+       test_must_fail git diff &&
+       git config diff.interHunkContext -1 &&
+       test_must_fail git diff
+'
+
 test_done