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authorMichal Privoznik <mprivozn@redhat.com>2013-01-16 08:51:57 +0100
committerJunio C Hamano <gitster@pobox.com>2013-01-16 09:37:45 -0800
commit07ab4dec80f1c24660ed4bc371849fb4f11a4ee3 (patch)
tree3f9fc184e856b805b2d7a52873fd7f6ea6aee313 /diff.c
parent216120ab8387c5c9c13b673eab2ff5e1d2d9cbb7 (diff)
downloadgit-07ab4dec80f1c24660ed4bc371849fb4f11a4ee3.tar.gz
config: Introduce diff.algorithm variable
Some users or projects prefer different algorithms over others, e.g. patience over myers or similar. However, specifying appropriate argument every time diff is to be used is impractical. Moreover, creating an alias doesn't play nicely with other tools based on diff (git-show for instance). Hence, a configuration variable which is able to set specific algorithm is needed. For now, these four values are accepted: 'myers' (which has the same effect as not setting the config variable at all), 'minimal', 'patience' and 'histogram'. Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'diff.c')
-rw-r--r--diff.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/diff.c b/diff.c
index 732d4c2275..d2be777793 100644
--- a/diff.c
+++ b/diff.c
@@ -36,6 +36,7 @@ static int diff_no_prefix;
static int diff_stat_graph_width;
static int diff_dirstat_permille_default = 30;
static struct diff_options default_diff_options;
+static long diff_algorithm;
static char diff_colors[][COLOR_MAXLEN] = {
GIT_COLOR_RESET,
@@ -143,6 +144,21 @@ static int git_config_rename(const char *var, const char *value)
return git_config_bool(var,value) ? DIFF_DETECT_RENAME : 0;
}
+static long parse_algorithm_value(const char *value)
+{
+ if (!value)
+ return -1;
+ else if (!strcasecmp(value, "myers") || !strcasecmp(value, "default"))
+ return 0;
+ else if (!strcasecmp(value, "minimal"))
+ return XDF_NEED_MINIMAL;
+ else if (!strcasecmp(value, "patience"))
+ return XDF_PATIENCE_DIFF;
+ else if (!strcasecmp(value, "histogram"))
+ return XDF_HISTOGRAM_DIFF;
+ return -1;
+}
+
/*
* These are to give UI layer defaults.
* The core-level commands such as git-diff-files should
@@ -196,6 +212,13 @@ int git_diff_ui_config(const char *var, const char *value, void *cb)
return 0;
}
+ if (!strcmp(var, "diff.algorithm")) {
+ diff_algorithm = parse_algorithm_value(value);
+ if (diff_algorithm < 0)
+ return -1;
+ return 0;
+ }
+
if (git_color_config(var, value, cb) < 0)
return -1;
@@ -3213,6 +3236,7 @@ void diff_setup(struct diff_options *options)
options->add_remove = diff_addremove;
options->use_color = diff_use_color_default;
options->detect_rename = diff_detect_rename_default;
+ options->xdl_opts |= diff_algorithm;
if (diff_no_prefix) {
options->a_prefix = options->b_prefix = "";