diff mbox series

[v4,15/15] bugreport: summarize contents of alternates file

Message ID 20191213004312.169753-16-emilyshaffer@google.com (mailing list archive)
State New, archived
Headers show
Series [v4,01/15] bugreport: add tool to generate debugging info | expand

Commit Message

Emily Shaffer Dec. 13, 2019, 12:43 a.m. UTC
In some cases, it could be that the user is having a problem with an
object which isn't present in their normal object directory. We can get
a hint that that might be the case by examining the list of alternates
where their object may be stored instead. Since paths to alternates may
be sensitive, we'll instead count how many alternates have been
specified and note how many of them exist or are broken.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
---
 bugreport.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
diff mbox series

Patch

diff --git a/bugreport.c b/bugreport.c
index 5d300f1c5f..d2a3fb1f67 100644
--- a/bugreport.c
+++ b/bugreport.c
@@ -307,6 +307,42 @@  static void get_object_info_summary(struct strbuf *obj_info)
 	strbuf_release(&dirpath);
 }
 
+static void get_alternates_summary(struct strbuf *alternates_info)
+{
+	struct strbuf alternates_path = STRBUF_INIT;
+	struct strbuf alternate = STRBUF_INIT;
+	FILE *file;
+	size_t exists = 0, broken = 0;
+
+	strbuf_addstr(&alternates_path, get_object_directory());
+	strbuf_complete(&alternates_path, '/');
+	strbuf_addstr(&alternates_path, "info/alternates");
+
+	file = fopen(alternates_path.buf, "r");
+	if (!file) {
+		strbuf_addstr(alternates_info, "No alternates file found.\n");
+		strbuf_release(&alternates_path);
+		return;
+	}
+
+	while (strbuf_getline(&alternate, file) != EOF) {
+		if (!access(alternate.buf, F_OK))
+			exists++;
+		else
+			broken++;
+	}
+
+	strbuf_addf(alternates_info,
+		    "%zd alternates found (%zd working, %zd broken)\n",
+		    exists + broken,
+		    exists,
+		    broken);
+
+	fclose(file);
+	strbuf_release(&alternate);
+	strbuf_release(&alternates_path);
+}
+
 static const char * const bugreport_usage[] = {
 	N_("git bugreport [-o|--output <file>]"),
 	NULL
@@ -386,6 +422,9 @@  int cmd_main(int argc, const char **argv)
 	get_header(&buffer, "Object Info Summary");
 	get_object_info_summary(&buffer);
 
+	get_header(&buffer, "Alternates");
+	get_alternates_summary(&buffer);
+
 	report = fopen_for_writing(report_path.buf);
 	strbuf_write(&buffer, report);
 	fclose(report);