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/* ui-diff.c: show diff between two blobs
*
* Copyright (C) 2006 Lars Hjemli
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
/*
* 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_ISDIRLNK(mode1) || S_ISDIRLNK(mode2));
html("<div class='head'>");
html("diff --git a/");
html_txt(path1);
html(" b/");
html_txt(path2);
if (is_null_sha1(sha1))
path1 = "dev/null";
if (is_null_sha1(sha2))
path2 = "dev/null";
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);
}
html("<br/>--- a/");
html_txt(path1);
html("<br/>+++ b/");
html_txt(path2);
}
html("</div>");
}
static void filepair_cb(struct diff_filepair *pair)
{
header(pair->one->sha1, pair->one->path, pair->one->mode,
pair->two->sha1, pair->two->path, pair->two->mode);
if (S_ISDIRLNK(pair->one->mode) || S_ISDIRLNK(pair->two->mode)) {
if (S_ISDIRLNK(pair->one->mode))
print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
if (S_ISDIRLNK(pair->two->mode))
print_line(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
return;
}
if (cgit_diff_files(pair->one->sha1, pair->two->sha1, print_line))
cgit_print_error("Error running diff");
}
void cgit_print_diff(const char *new_rev, const char *old_rev)
{
unsigned char sha1[20], sha2[20];
enum object_type type;
unsigned long size;
struct commit *commit, *commit2;
if (!new_rev)
new_rev = cgit_query_head;
get_sha1(new_rev, sha1);
type = sha1_object_info(sha1, &size);
if (type == OBJ_BAD) {
cgit_print_error(fmt("Bad object name: %s", new_rev));
return;
}
if (type != OBJ_COMMIT) {
cgit_print_error(fmt("Unhandled object type: %s",
typename(type)));
return;
}
commit = lookup_commit_reference(sha1);
if (!commit || parse_commit(commit))
cgit_print_error(fmt("Bad commit: %s", sha1_to_hex(sha1)));
if (old_rev)
get_sha1(old_rev, sha2);
else if (commit->parents && commit->parents->item)
hashcpy(sha2, commit->parents->item->object.sha1);
else
hashclr(sha2);
if (!is_null_sha1(sha2)) {
type = sha1_object_info(sha2, &size);
if (type == OBJ_BAD) {
cgit_print_error(fmt("Bad object name: %s", sha1_to_hex(sha2)));
return;
}
commit2 = lookup_commit_reference(sha2);
if (!commit2 || parse_commit(commit2))
cgit_print_error(fmt("Bad commit: %s", sha1_to_hex(sha2)));
}
html("<table class='diff'>");
html("<tr><td>");
cgit_diff_tree(sha2, sha1, filepair_cb);
html("</td></tr>");
html("</table>");
}
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