Introduce a configuration variable diff.context that tells
Porcelain commands to use a non-default number of context
lines instead of 3 (the default). With this variable, users
do not have to keep repeating "git log -U8" from the command
line; instead, it becomes sufficient to say "git config
diff.context 8" just once.
Signed-off-by: Jeff Muizelaar <jmuizelaar@xxxxxxxxxxx>
---
This fixes the tests to behave better and avoids 'grep -v'
Documentation/diff-config.txt | 4 +
diff.c | 9 +++-
t/t4055-diff-context.sh | 128 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 140 insertions(+), 1 deletions(-)
create mode 100755 t/t4055-diff-context.sh
diff --git a/Documentation/diff-config.txt b/Documentation/diff-config.txt
index 67a90a8..75ab8a5 100644
--- a/Documentation/diff-config.txt
+++ b/Documentation/diff-config.txt
@@ -56,6 +56,10 @@ diff.statGraphWidth::
Limit the width of the graph part in --stat output. If set, applies
to all commands generating --stat output except format-patch.
+diff.context::
+ Generate diffs with <n> lines of context instead of the default of
+ 3. This value is overridden by the -U 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/diff.c b/diff.c
index 35d3f07..86e5f2a 100644
--- a/diff.c
+++ b/diff.c
@@ -26,6 +26,7 @@ static int diff_detect_rename_default;
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 const char *diff_word_regex_cfg;
static const char *external_diff_cmd_cfg;
int diff_auto_refresh_index = 1;
@@ -141,6 +142,12 @@ int git_diff_ui_config(const char *var, const char *value, void *cb)
diff_use_color_default = git_config_colorbool(var, value);
return 0;
}
+ if (!strcmp(var, "diff.context")) {
+ diff_context_default = git_config_int(var, value);
+ if (diff_context_default < 0)
+ return -1;
+ return 0;
+ }
if (!strcmp(var, "diff.renames")) {
diff_detect_rename_default = git_config_rename(var, value);
return 0;
@@ -3170,7 +3177,7 @@ void diff_setup(struct diff_options *options)
options->break_opt = -1;
options->rename_limit = -1;
options->dirstat_permille = diff_dirstat_permille_default;
- options->context = 3;
+ options->context = diff_context_default;
DIFF_OPT_SET(options, RENAME_EMPTY);
options->change = diff_change;
diff --git a/t/t4055-diff-context.sh b/t/t4055-diff-context.sh
new file mode 100755
index 0000000..8a31448
--- /dev/null
+++ b/t/t4055-diff-context.sh
@@ -0,0 +1,128 @@
+#!/bin/sh
+#
+# Copyright (c) 2012 Mozilla Foundation
+#
+
+test_description='diff.context configuration'
+
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+ cat >x <<-EOF &&
+firstline
+b
+c
+d
+e
+f
+preline
+postline
+i
+j
+k
+l
+m
+n
+EOF
+ git update-index --add x &&
+ git commit -m initial &&
+ cat >x <<-\EOF &&
+firstline
+b
+c
+d
+e
+f
+preline
+1
+postline
+i
+j
+k
+l
+m
+n
+EOF
+ git update-index --add x &&
+ git commit -m next &&
+cat >x <<-\EOF
+firstline
+b
+c
+d
+e
+f
+preline
+2
+postline
+i
+j
+k
+l
+m
+n
+EOF
+'
+
+test_expect_success 'diff.context affects log' '
+ git log -1 -p >output &&
+ ! grep firstline output &&
+ git config diff.context 8 &&
+ git log -1 -p >output &&
+ grep firstline output
+'
+
+test_expect_success 'different -U value' '
+ git config diff.context 8 &&
+ git log -U4 -1 >output &&
+ ! grep firstline output
+'
+
+test_expect_success 'diff.context affects diff' '
+ git config diff.context 8 &&
+ git diff >output &&
+ grep firstline output
+'
+
+test_expect_success 'plumbing not affected' '
+ git config diff.context 8 &&
+ git diff-files -p > output &&
+ ! grep firstline output
+'
+test_expect_success 'non-integer config parsing' '
+ cat > .git/config <<-\EOF &&
+[diff]
+ context = no
+EOF
+ ! git diff 2>output &&
+ grep "bad config value" output
+'
+
+test_expect_success 'negative integer config parsing' '
+ cat >.git/config <<-\EOF &&
+[diff]
+ context = -1
+EOF
+ ! git diff 2>output &&
+ grep "bad config file" output
+'
+
+test_expect_success '0 config parsing' '
+ cat > .git/config <<-\EOF &&
+[diff]
+ context = 0
+EOF
+ git diff >output &&
+ grep preline output
+'
+
+test_expect_success 'config parsing' '
+ cat >.git/config <<-\EOF &&
+[diff]
+ context = 8
+EOF
+ git diff >output &&
+ grep postline output
+'
+
+test_done
--
1.7.4.4
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