X-Git-Url: https://gitweb.ps.run/ps-cgit/blobdiff_plain/38a0f9cd89c4c5a97bd5b38e7b56da809a00fccb..0c8e184e9cbf4d3a1e907de9125f6d8210c169d6:/ui-diff.c

diff --git a/ui-diff.c b/ui-diff.c
index 96106af..ac9a3fa 100644
--- a/ui-diff.c
+++ b/ui-diff.c
@@ -9,6 +9,9 @@
 #include "cgit.h"
 
 
+unsigned char old_rev_sha1[20];
+unsigned char new_rev_sha1[20];
+
 /*
  * print a single line returned from xdiff
  */
@@ -31,15 +34,116 @@ static void print_line(char *line, int len)
 	line[len-1] = c;
 }
 
-void cgit_print_diff(const char *old_hex, const char *new_hex)
+static void header(unsigned char *sha1, char *path1, int mode1,
+		   unsigned char *sha2, char *path2, int mode2)
 {
-	unsigned char sha1[20], sha2[20];
+	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 (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);
 
-	get_sha1(old_hex, sha1);
-	get_sha1(new_hex, sha2);
+	if (mode2 == 0)
+		htmlf("<br/>deleted file mode %.6o", mode1);
 
-	html("<table class='diff'><tr><td>");
-	if (cgit_diff_files(sha1, sha2, print_line))
+	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/");
+		if (mode1 != 0)
+			cgit_tree_link(path1, NULL, NULL, cgit_query_head,
+				       sha1_to_hex(old_rev_sha1), path1);
+		else
+			html_txt(path1);
+		html("<br/>+++ b/");
+		if (mode2 != 0)
+			cgit_tree_link(path2, NULL, NULL, cgit_query_head,
+				       sha1_to_hex(new_rev_sha1), path2);
+		else
+			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_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
+		if (S_ISGITLINK(pair->one->mode))
+			print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
+		if (S_ISGITLINK(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");
-	html("</td></tr></table>");
+}
+
+void cgit_print_diff(const char *new_rev, const char *old_rev, const char *prefix)
+{
+	enum object_type type;
+	unsigned long size;
+	struct commit *commit, *commit2;
+
+	if (!new_rev)
+		new_rev = cgit_query_head;
+	get_sha1(new_rev, new_rev_sha1);
+	type = sha1_object_info(new_rev_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(new_rev_sha1);
+	if (!commit || parse_commit(commit))
+		cgit_print_error(fmt("Bad commit: %s", sha1_to_hex(new_rev_sha1)));
+
+	if (old_rev)
+		get_sha1(old_rev, old_rev_sha1);
+	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)) {
+		type = sha1_object_info(old_rev_sha1, &size);
+		if (type == OBJ_BAD) {
+			cgit_print_error(fmt("Bad object name: %s", sha1_to_hex(old_rev_sha1)));
+			return;
+		}
+		commit2 = lookup_commit_reference(old_rev_sha1);
+		if (!commit2 || parse_commit(commit2))
+			cgit_print_error(fmt("Bad commit: %s", sha1_to_hex(old_rev_sha1)));
+	}
+	html("<table class='diff'>");
+	html("<tr><td>");
+	cgit_diff_tree(old_rev_sha1, new_rev_sha1, filepair_cb, prefix);
+	html("</td></tr>");
+	html("</table>");
 }