cgitsb/ui-diff.c
John Keeping ddfaef6bb2 ui-diff: add "stat only" diff type
This prints the diffstat but stops before printing (or generating) any
of the body of the diff.

No cgitrc option is added here so that we can wait to see how useful
this is before letting people set it as the default.

Suggested-by: Konstantin Ryabitsev <mricon@kernel.org>
Signed-off-by: John Keeping <john@keeping.me.uk>
2014-12-13 12:38:42 +01:00

448 خطوط
11 KiB
C

/* ui-diff.c: show diff between two blobs
*
* Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
#include "ui-diff.h"
#include "html.h"
#include "ui-shared.h"
#include "ui-ssdiff.h"
unsigned char old_rev_sha1[20];
unsigned char new_rev_sha1[20];
static int files, slots;
static int total_adds, total_rems, max_changes;
static int lines_added, lines_removed;
static struct fileinfo {
char status;
unsigned char old_sha1[20];
unsigned char new_sha1[20];
unsigned short old_mode;
unsigned short new_mode;
char *old_path;
char *new_path;
unsigned int added;
unsigned int removed;
unsigned long old_size;
unsigned long new_size;
int binary:1;
} *items;
static int use_ssdiff = 0;
static struct diff_filepair *current_filepair;
struct diff_filespec *cgit_get_current_old_file(void)
{
return current_filepair->one;
}
struct diff_filespec *cgit_get_current_new_file(void)
{
return current_filepair->two;
}
static void print_fileinfo(struct fileinfo *info)
{
char *class;
switch (info->status) {
case DIFF_STATUS_ADDED:
class = "add";
break;
case DIFF_STATUS_COPIED:
class = "cpy";
break;
case DIFF_STATUS_DELETED:
class = "del";
break;
case DIFF_STATUS_MODIFIED:
class = "upd";
break;
case DIFF_STATUS_RENAMED:
class = "mov";
break;
case DIFF_STATUS_TYPE_CHANGED:
class = "typ";
break;
case DIFF_STATUS_UNKNOWN:
class = "unk";
break;
case DIFF_STATUS_UNMERGED:
class = "stg";
break;
default:
die("bug: unhandled diff status %c", info->status);
}
html("<tr>");
htmlf("<td class='mode'>");
if (is_null_sha1(info->new_sha1)) {
cgit_print_filemode(info->old_mode);
} else {
cgit_print_filemode(info->new_mode);
}
if (info->old_mode != info->new_mode &&
!is_null_sha1(info->old_sha1) &&
!is_null_sha1(info->new_sha1)) {
html("<span class='modechange'>[");
cgit_print_filemode(info->old_mode);
html("]</span>");
}
htmlf("</td><td class='%s'>", class);
cgit_diff_link(info->new_path, NULL, NULL, ctx.qry.head, ctx.qry.sha1,
ctx.qry.sha2, info->new_path);
if (info->status == DIFF_STATUS_COPIED || info->status == DIFF_STATUS_RENAMED) {
htmlf(" (%s from ",
info->status == DIFF_STATUS_COPIED ? "copied" : "renamed");
html_txt(info->old_path);
html(")");
}
html("</td><td class='right'>");
if (info->binary) {
htmlf("bin</td><td class='graph'>%ld -> %ld bytes",
info->old_size, info->new_size);
return;
}
htmlf("%d", info->added + info->removed);
html("</td><td class='graph'>");
htmlf("<table summary='file diffstat' width='%d%%'><tr>", (max_changes > 100 ? 100 : max_changes));
htmlf("<td class='add' style='width: %.1f%%;'/>",
info->added * 100.0 / max_changes);
htmlf("<td class='rem' style='width: %.1f%%;'/>",
info->removed * 100.0 / max_changes);
htmlf("<td class='none' style='width: %.1f%%;'/>",
(max_changes - info->removed - info->added) * 100.0 / max_changes);
html("</tr></table></td></tr>\n");
}
static void count_diff_lines(char *line, int len)
{
if (line && (len > 0)) {
if (line[0] == '+')
lines_added++;
else if (line[0] == '-')
lines_removed++;
}
}
static void inspect_filepair(struct diff_filepair *pair)
{
int binary = 0;
unsigned long old_size = 0;
unsigned long new_size = 0;
files++;
lines_added = 0;
lines_removed = 0;
cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size, &new_size,
&binary, 0, ctx.qry.ignorews, count_diff_lines);
if (files >= slots) {
if (slots == 0)
slots = 4;
else
slots = slots * 2;
items = xrealloc(items, slots * sizeof(struct fileinfo));
}
items[files-1].status = pair->status;
hashcpy(items[files-1].old_sha1, pair->one->sha1);
hashcpy(items[files-1].new_sha1, pair->two->sha1);
items[files-1].old_mode = pair->one->mode;
items[files-1].new_mode = pair->two->mode;
items[files-1].old_path = xstrdup(pair->one->path);
items[files-1].new_path = xstrdup(pair->two->path);
items[files-1].added = lines_added;
items[files-1].removed = lines_removed;
items[files-1].old_size = old_size;
items[files-1].new_size = new_size;
items[files-1].binary = binary;
if (lines_added + lines_removed > max_changes)
max_changes = lines_added + lines_removed;
total_adds += lines_added;
total_rems += lines_removed;
}
static void cgit_print_diffstat(const unsigned char *old_sha1,
const unsigned char *new_sha1,
const char *prefix)
{
int i;
html("<div class='diffstat-header'>");
cgit_diff_link("Diffstat", NULL, NULL, ctx.qry.head, ctx.qry.sha1,
ctx.qry.sha2, NULL);
if (prefix) {
html(" (limited to '");
html_txt(prefix);
html("')");
}
html("</div>");
html("<table summary='diffstat' class='diffstat'>");
max_changes = 0;
cgit_diff_tree(old_sha1, new_sha1, inspect_filepair, prefix,
ctx.qry.ignorews);
for (i = 0; i<files; i++)
print_fileinfo(&items[i]);
html("</table>");
html("<div class='diffstat-summary'>");
htmlf("%d files changed, %d insertions, %d deletions",
files, total_adds, total_rems);
html("</div>");
}
/*
* print a single line returned from xdiff
*/
static void print_line(char *line, int len)
{
char *class = "ctx";
char c = line[len-1];
if (line[0] == '+')
class = "add";
else if (line[0] == '-')
class = "del";
else if (line[0] == '@')
class = "hunk";
htmlf("<div class='%s'>", class);
line[len-1] = '\0';
html_txt(line);
html("</div>");
line[len-1] = c;
}
static void header(unsigned char *sha1, char *path1, int mode1,
unsigned char *sha2, char *path2, int mode2)
{
char *abbrev1, *abbrev2;
int subproject;
subproject = (S_ISGITLINK(mode1) || S_ISGITLINK(mode2));
html("<div class='head'>");
html("diff --git a/");
html_txt(path1);
html(" b/");
html_txt(path2);
if (mode1 == 0)
htmlf("<br/>new file mode %.6o", mode2);
if (mode2 == 0)
htmlf("<br/>deleted file mode %.6o", mode1);
if (!subproject) {
abbrev1 = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
abbrev2 = xstrdup(find_unique_abbrev(sha2, DEFAULT_ABBREV));
htmlf("<br/>index %s..%s", abbrev1, abbrev2);
free(abbrev1);
free(abbrev2);
if (mode1 != 0 && mode2 != 0) {
htmlf(" %.6o", mode1);
if (mode2 != mode1)
htmlf("..%.6o", mode2);
}
if (is_null_sha1(sha1)) {
path1 = "dev/null";
html("<br/>--- /");
} else
html("<br/>--- a/");
if (mode1 != 0)
cgit_tree_link(path1, NULL, NULL, ctx.qry.head,
sha1_to_hex(old_rev_sha1), path1);
else
html_txt(path1);
if (is_null_sha1(sha2)) {
path2 = "dev/null";
html("<br/>+++ /");
} else
html("<br/>+++ b/");
if (mode2 != 0)
cgit_tree_link(path2, NULL, NULL, ctx.qry.head,
sha1_to_hex(new_rev_sha1), path2);
else
html_txt(path2);
}
html("</div>");
}
static void filepair_cb(struct diff_filepair *pair)
{
unsigned long old_size = 0;
unsigned long new_size = 0;
int binary = 0;
linediff_fn print_line_fn = print_line;
current_filepair = pair;
if (use_ssdiff) {
cgit_ssdiff_header_begin();
print_line_fn = cgit_ssdiff_line_cb;
}
header(pair->one->sha1, pair->one->path, pair->one->mode,
pair->two->sha1, pair->two->path, pair->two->mode);
if (use_ssdiff)
cgit_ssdiff_header_end();
if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
if (S_ISGITLINK(pair->one->mode))
print_line_fn(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
if (S_ISGITLINK(pair->two->mode))
print_line_fn(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
if (use_ssdiff)
cgit_ssdiff_footer();
return;
}
if (cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size,
&new_size, &binary, ctx.qry.context,
ctx.qry.ignorews, print_line_fn))
cgit_print_error("Error running diff");
if (binary) {
if (use_ssdiff)
html("<tr><td colspan='4'>Binary files differ</td></tr>");
else
html("Binary files differ");
}
if (use_ssdiff)
cgit_ssdiff_footer();
}
void cgit_print_diff_ctrls()
{
int i, curr;
html("<div class='cgit-panel'>");
html("<b>diff options</b>");
html("<form method='get' action='.'>");
cgit_add_hidden_formfields(1, 0, ctx.qry.page);
html("<table>");
html("<tr><td colspan='2'/></tr>");
html("<tr>");
html("<td class='label'>context:</td>");
html("<td class='ctrl'>");
html("<select name='context' onchange='this.form.submit();'>");
curr = ctx.qry.context;
if (!curr)
curr = 3;
for (i = 1; i <= 10; i++)
html_intoption(i, fmt("%d", i), curr);
for (i = 15; i <= 40; i += 5)
html_intoption(i, fmt("%d", i), curr);
html("</select>");
html("</td>");
html("</tr><tr>");
html("<td class='label'>space:</td>");
html("<td class='ctrl'>");
html("<select name='ignorews' onchange='this.form.submit();'>");
html_intoption(0, "include", ctx.qry.ignorews);
html_intoption(1, "ignore", ctx.qry.ignorews);
html("</select>");
html("</td>");
html("</tr><tr>");
html("<td class='label'>mode:</td>");
html("<td class='ctrl'>");
html("<select name='dt' onchange='this.form.submit();'>");
curr = ctx.qry.has_difftype ? ctx.qry.difftype : ctx.cfg.difftype;
html_intoption(0, "unified", curr);
html_intoption(1, "ssdiff", curr);
html_intoption(2, "stat only", curr);
html("</select></td></tr>");
html("<tr><td/><td class='ctrl'>");
html("<noscript><input type='submit' value='reload'/></noscript>");
html("</td></tr></table>");
html("</form>");
html("</div>");
}
void cgit_print_diff(const char *new_rev, const char *old_rev,
const char *prefix, int show_ctrls, int raw)
{
struct commit *commit, *commit2;
const unsigned char *old_tree_sha1, *new_tree_sha1;
diff_type difftype;
if (!new_rev)
new_rev = ctx.qry.head;
if (get_sha1(new_rev, new_rev_sha1)) {
cgit_print_error("Bad object name: %s", new_rev);
return;
}
commit = lookup_commit_reference(new_rev_sha1);
if (!commit || parse_commit(commit)) {
cgit_print_error("Bad commit: %s", sha1_to_hex(new_rev_sha1));
return;
}
new_tree_sha1 = commit->tree->object.sha1;
if (old_rev) {
if (get_sha1(old_rev, old_rev_sha1)) {
cgit_print_error("Bad object name: %s", old_rev);
return;
}
} else if (commit->parents && commit->parents->item) {
hashcpy(old_rev_sha1, commit->parents->item->object.sha1);
} else {
hashclr(old_rev_sha1);
}
if (!is_null_sha1(old_rev_sha1)) {
commit2 = lookup_commit_reference(old_rev_sha1);
if (!commit2 || parse_commit(commit2)) {
cgit_print_error("Bad commit: %s", sha1_to_hex(old_rev_sha1));
return;
}
old_tree_sha1 = commit2->tree->object.sha1;
} else {
old_tree_sha1 = NULL;
}
if (raw) {
struct diff_options diffopt;
diff_setup(&diffopt);
diffopt.output_format = DIFF_FORMAT_PATCH;
DIFF_OPT_SET(&diffopt, RECURSIVE);
diff_setup_done(&diffopt);
ctx.page.mimetype = "text/plain";
cgit_print_http_headers();
if (old_tree_sha1) {
diff_tree_sha1(old_tree_sha1, new_tree_sha1, "",
&diffopt);
} else {
diff_root_tree_sha1(new_tree_sha1, "", &diffopt);
}
diffcore_std(&diffopt);
diff_flush(&diffopt);
return;
}
difftype = ctx.qry.has_difftype ? ctx.qry.difftype : ctx.cfg.difftype;
use_ssdiff = difftype == DIFF_SSDIFF;
if (show_ctrls)
cgit_print_diff_ctrls();
cgit_print_diffstat(old_rev_sha1, new_rev_sha1, prefix);
if (difftype == DIFF_STATONLY)
return;
if (use_ssdiff) {
html("<table summary='ssdiff' class='ssdiff'>");
} else {
html("<table summary='diff' class='diff'>");
html("<tr><td>");
}
cgit_diff_tree(old_rev_sha1, new_rev_sha1, filepair_cb, prefix,
ctx.qry.ignorews);
if (!use_ssdiff)
html("</td></tr>");
html("</table>");
}