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Merge branch 'mp/diff-algo-config'

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Add diff.algorithm configuration so that the user does not type
"diff --histogram".

* mp/diff-algo-config:
  diff: Introduce --diff-algorithm command line option
  config: Introduce diff.algorithm variable
  git-completion.bash: Autocomplete --minimal and --histogram for git-diff
This commit is contained in:
Junio C Hamano
2013-02-17 15:25:51 -08:00
parent adbbc6f291 07924d4d50
commit abea4dc76a
6 changed files with 95 additions and 1 deletions
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34
diff.c
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@ -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;
}
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;
@ -3163,6 +3186,7 @@ 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 = "";
@ -3560,6 +3584,16 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
else if (!strcmp(arg, "--histogram"))
options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF);
else if (!prefixcmp(arg, "--diff-algorithm=")) {
long value = parse_algorithm_value(arg+17);
if (value < 0)
return error("option diff-algorithm accepts \"myers\", "
"\"minimal\", \"patience\" and \"histogram\"");
/* clear out previous settings */
DIFF_XDL_CLR(options, NEED_MINIMAL);
options->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK;
options->xdl_opts |= value;
}
/* flags options */
else if (!strcmp(arg, "--binary")) {