cgitsb/ui-diff.c
Christian Hesse 1dd53e3a2f git: update to v2.16.0
Update to git version v2.16.0:

* refs: convert resolve_ref_unsafe to struct object_id
  (49e61479be913f67e66bb3fdf8de9475c41b58bd)
* diff: remove DIFF_OPT_SET macro
  (23dcf77f48feb49c54bad09210f093a799816334)
* log: add option to choose which refs to decorate
  (65516f586b69307f977cd67cc45513a296cabc25)
* diff: convert flags to be stored in bitfields
  (02f2f56bc377c287c411947d0e1482aac888f8db)

Signed-off-by: Christian Hesse <mail@eworm.de>
2018-01-19 11:34:43 +01:00

502 líneas
13 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"
struct object_id old_rev_oid[1];
struct object_id new_rev_oid[1];
static int files, slots;
static int total_adds, total_rems, max_changes;
static int lines_added, lines_removed;
static struct fileinfo {
char status;
struct object_id old_oid[1];
struct object_id new_oid[1];
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;
unsigned int binary:1;
} *items;
static int use_ssdiff = 0;
static struct diff_filepair *current_filepair;
static const char *current_prefix;
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_oid(info->new_oid)) {
cgit_print_filemode(info->old_mode);
} else {
cgit_print_filemode(info->new_mode);
}
if (info->old_mode != info->new_mode &&
!is_null_oid(info->old_oid) &&
!is_null_oid(info->new_oid)) {
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 int show_filepair(struct diff_filepair *pair)
{
/* Always show if we have no limiting prefix. */
if (!current_prefix)
return 1;
/* Show if either path in the pair begins with the prefix. */
if (starts_with(pair->one->path, current_prefix) ||
starts_with(pair->two->path, current_prefix))
return 1;
/* Otherwise we don't want to show this filepair. */
return 0;
}
static void inspect_filepair(struct diff_filepair *pair)
{
int binary = 0;
unsigned long old_size = 0;
unsigned long new_size = 0;
if (!show_filepair(pair))
return;
files++;
lines_added = 0;
lines_removed = 0;
cgit_diff_files(&pair->one->oid, &pair->two->oid, &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;
oidcpy(items[files-1].old_oid, &pair->one->oid);
oidcpy(items[files-1].new_oid, &pair->two->oid);
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 struct object_id *old_oid,
const struct object_id *new_oid,
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_oid, new_oid, 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(const struct object_id *oid1, char *path1, int mode1,
const struct object_id *oid2, 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(oid1->hash, DEFAULT_ABBREV));
abbrev2 = xstrdup(find_unique_abbrev(oid2->hash, 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_oid(oid1)) {
path1 = "dev/null";
html("<br/>--- /");
} else
html("<br/>--- a/");
if (mode1 != 0)
cgit_tree_link(path1, NULL, NULL, ctx.qry.head,
oid_to_hex(old_rev_oid), path1);
else
html_txt(path1);
if (is_null_oid(oid2)) {
path2 = "dev/null";
html("<br/>+++ /");
} else
html("<br/>+++ b/");
if (mode2 != 0)
cgit_tree_link(path2, NULL, NULL, ctx.qry.head,
oid_to_hex(new_rev_oid), 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;
if (!show_filepair(pair))
return;
current_filepair = pair;
if (use_ssdiff) {
cgit_ssdiff_header_begin();
print_line_fn = cgit_ssdiff_line_cb;
}
header(&pair->one->oid, pair->one->path, pair->one->mode,
&pair->two->oid, 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", oid_to_hex(&pair->one->oid)), 52);
if (S_ISGITLINK(pair->two->mode))
print_line_fn(fmt("+Subproject %s", oid_to_hex(&pair->two->oid)), 52);
if (use_ssdiff)
cgit_ssdiff_footer();
return;
}
if (cgit_diff_files(&pair->one->oid, &pair->two->oid, &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(void)
{
int i, curr;
html("<div class='cgit-panel'>");
html("<b>diff options</b>");
html("<form method='get'>");
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 struct object_id *old_tree_oid, *new_tree_oid;
diff_type difftype;
/*
* If "follow" is set then the diff machinery needs to examine the
* entire commit to detect renames so we must limit the paths in our
* own callbacks and not pass the prefix to the diff machinery.
*/
if (ctx.qry.follow && ctx.cfg.enable_follow_links) {
current_prefix = prefix;
prefix = "";
} else {
current_prefix = NULL;
}
if (!new_rev)
new_rev = ctx.qry.head;
if (get_oid(new_rev, new_rev_oid)) {
cgit_print_error_page(404, "Not found",
"Bad object name: %s", new_rev);
return;
}
commit = lookup_commit_reference(new_rev_oid);
if (!commit || parse_commit(commit)) {
cgit_print_error_page(404, "Not found",
"Bad commit: %s", oid_to_hex(new_rev_oid));
return;
}
new_tree_oid = &commit->tree->object.oid;
if (old_rev) {
if (get_oid(old_rev, old_rev_oid)) {
cgit_print_error_page(404, "Not found",
"Bad object name: %s", old_rev);
return;
}
} else if (commit->parents && commit->parents->item) {
oidcpy(old_rev_oid, &commit->parents->item->object.oid);
} else {
oidclr(old_rev_oid);
}
if (!is_null_oid(old_rev_oid)) {
commit2 = lookup_commit_reference(old_rev_oid);
if (!commit2 || parse_commit(commit2)) {
cgit_print_error_page(404, "Not found",
"Bad commit: %s", oid_to_hex(old_rev_oid));
return;
}
old_tree_oid = &commit2->tree->object.oid;
} else {
old_tree_oid = NULL;
}
if (raw) {
struct diff_options diffopt;
diff_setup(&diffopt);
diffopt.output_format = DIFF_FORMAT_PATCH;
diffopt.flags.recursive = 1;
diff_setup_done(&diffopt);
ctx.page.mimetype = "text/plain";
cgit_print_http_headers();
if (old_tree_oid) {
diff_tree_oid(old_tree_oid, new_tree_oid, "",
&diffopt);
} else {
diff_root_tree_oid(new_tree_oid, "", &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_layout_start();
cgit_print_diff_ctrls();
}
/*
* Clicking on a link to a file in the diff stat should show a diff
* of the file, showing the diff stat limited to a single file is
* pretty useless. All links from this point on will be to
* individual files, so we simply reset the difftype in the query
* here to avoid propagating DIFF_STATONLY to the individual files.
*/
if (difftype == DIFF_STATONLY)
ctx.qry.difftype = ctx.cfg.difftype;
cgit_print_diffstat(old_rev_oid, new_rev_oid, 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_oid, new_rev_oid, filepair_cb, prefix,
ctx.qry.ignorews);
if (!use_ssdiff)
html("</td></tr>");
html("</table>");
if (show_ctrls)
cgit_print_layout_end();
}