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Merge branch 'js/range-diff-one-side-only'

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The "git range-diff" command learned "--(left|right)-only" option
to show only one side of the compared range.

* js/range-diff-one-side-only:
  range-diff: offer --left-only/--right-only options
  range-diff: move the diffopt initialization down one layer
  range-diff: combine all options in a single data structure
  range-diff: simplify code spawning `git log`
  range-diff: libify the read_patches() function again
  range-diff: avoid leaking memory in two error code paths
This commit is contained in:
Junio C Hamano
2021-02-17 17:21:41 -08:00
parent 77348b0e6e 1e79f97326
commit dadc91ff0c
7 changed files with 120 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

101
range-diff.c
View File

@ -81,6 +81,8 @@ static int read_patches(const char *range, struct string_list *list,
finish_command(&cp);
return -1;
}
if (finish_command(&cp))
return -1;
line = contents.buf;
size = contents.len;
@ -98,10 +100,10 @@ static int read_patches(const char *range, struct string_list *list,
if (get_oid(p, &util->oid)) {
error(_("could not parse commit '%s'"), p);
free(util);
free(current_filename);
string_list_clear(list, 1);
strbuf_release(&buf);
strbuf_release(&contents);
finish_command(&cp);
return -1;
}
util->matching = -1;
@ -113,10 +115,10 @@ static int read_patches(const char *range, struct string_list *list,
error(_("could not parse first line of `log` output: "
"did not start with 'commit ': '%s'"),
line);
free(current_filename);
string_list_clear(list, 1);
strbuf_release(&buf);
strbuf_release(&contents);
finish_command(&cp);
return -1;
}
@ -134,9 +136,16 @@ static int read_patches(const char *range, struct string_list *list,
orig_len = len;
len = parse_git_diff_header(&root, &linenr, 0, line,
len, size, &patch);
if (len < 0)
die(_("could not parse git header '%.*s'"),
orig_len, line);
if (len < 0) {
error(_("could not parse git header '%.*s'"),
orig_len, line);
free(util);
free(current_filename);
string_list_clear(list, 1);
strbuf_release(&buf);
strbuf_release(&contents);
return -1;
}
strbuf_addstr(&buf, " ## ");
if (patch.is_new > 0)
strbuf_addf(&buf, "%s (new)", patch.new_name);
@ -219,9 +228,6 @@ static int read_patches(const char *range, struct string_list *list,
strbuf_release(&buf);
free(current_filename);
if (finish_command(&cp))
return -1;
return 0;
}
@ -459,12 +465,35 @@ static void patch_diff(const char *a, const char *b,
diff_flush(diffopt);
}
static struct strbuf *output_prefix_cb(struct diff_options *opt, void *data)
{
return data;
}
static void output(struct string_list *a, struct string_list *b,
struct diff_options *diffopt)
struct range_diff_options *range_diff_opts)
{
struct strbuf buf = STRBUF_INIT, dashes = STRBUF_INIT;
int patch_no_width = decimal_width(1 + (a->nr > b->nr ? a->nr : b->nr));
int i = 0, j = 0;
struct diff_options opts;
struct strbuf indent = STRBUF_INIT;
if (range_diff_opts->diffopt)
memcpy(&opts, range_diff_opts->diffopt, sizeof(opts));
else
diff_setup(&opts);
if (!opts.output_format)
opts.output_format = DIFF_FORMAT_PATCH;
opts.flags.suppress_diff_headers = 1;
opts.flags.dual_color_diffed_diffs =
range_diff_opts->dual_color;
opts.flags.suppress_hunk_header_line_count = 1;
opts.output_prefix = output_prefix_cb;
strbuf_addstr(&indent, " ");
opts.output_prefix_data = &indent;
diff_setup_done(&opts);
/*
* We assume the user is really more interested in the second argument
@ -485,7 +514,8 @@ static void output(struct string_list *a, struct string_list *b,
/* Show unmatched LHS commit whose predecessors were shown. */
if (i < a->nr && a_util->matching < 0) {
output_pair_header(diffopt, patch_no_width,
if (!range_diff_opts->right_only)
output_pair_header(&opts, patch_no_width,
&buf, &dashes, a_util, NULL);
i++;
continue;
@ -493,7 +523,8 @@ static void output(struct string_list *a, struct string_list *b,
/* Show unmatched RHS commits. */
while (j < b->nr && b_util->matching < 0) {
output_pair_header(diffopt, patch_no_width,
if (!range_diff_opts->left_only)
output_pair_header(&opts, patch_no_width,
&buf, &dashes, NULL, b_util);
b_util = ++j < b->nr ? b->items[j].util : NULL;
}
@ -501,63 +532,41 @@ static void output(struct string_list *a, struct string_list *b,
/* Show matching LHS/RHS pair. */
if (j < b->nr) {
a_util = a->items[b_util->matching].util;
output_pair_header(diffopt, patch_no_width,
output_pair_header(&opts, patch_no_width,
&buf, &dashes, a_util, b_util);
if (!(diffopt->output_format & DIFF_FORMAT_NO_OUTPUT))
if (!(opts.output_format & DIFF_FORMAT_NO_OUTPUT))
patch_diff(a->items[b_util->matching].string,
b->items[j].string, diffopt);
b->items[j].string, &opts);
a_util->shown = 1;
j++;
}
}
strbuf_release(&buf);
strbuf_release(&dashes);
}
static struct strbuf *output_prefix_cb(struct diff_options *opt, void *data)
{
return data;
strbuf_release(&indent);
}
int show_range_diff(const char *range1, const char *range2,
int creation_factor, int dual_color,
const struct diff_options *diffopt,
const struct strvec *other_arg)
struct range_diff_options *range_diff_opts)
{
int res = 0;
struct string_list branch1 = STRING_LIST_INIT_DUP;
struct string_list branch2 = STRING_LIST_INIT_DUP;
if (read_patches(range1, &branch1, other_arg))
if (range_diff_opts->left_only && range_diff_opts->right_only)
res = error(_("--left-only and --right-only are mutually exclusive"));
if (!res && read_patches(range1, &branch1, range_diff_opts->other_arg))
res = error(_("could not parse log for '%s'"), range1);
if (!res && read_patches(range2, &branch2, other_arg))
if (!res && read_patches(range2, &branch2, range_diff_opts->other_arg))
res = error(_("could not parse log for '%s'"), range2);
if (!res) {
struct diff_options opts;
struct strbuf indent = STRBUF_INIT;
if (diffopt)
memcpy(&opts, diffopt, sizeof(opts));
else
diff_setup(&opts);
if (!opts.output_format)
opts.output_format = DIFF_FORMAT_PATCH;
opts.flags.suppress_diff_headers = 1;
opts.flags.dual_color_diffed_diffs = dual_color;
opts.flags.suppress_hunk_header_line_count = 1;
opts.output_prefix = output_prefix_cb;
strbuf_addstr(&indent, " ");
opts.output_prefix_data = &indent;
diff_setup_done(&opts);
find_exact_matches(&branch1, &branch2);
get_correspondences(&branch1, &branch2, creation_factor);
output(&branch1, &branch2, &opts);
strbuf_release(&indent);
get_correspondences(&branch1, &branch2,
range_diff_opts->creation_factor);
output(&branch1, &branch2, range_diff_opts);
}
string_list_clear(&branch1, 1);