[PATCH 08/12] server-info: use strbuf to read old info/packs file

[Jeff King]

This old code uses fgets with a fixed-size buffer. Let's use a strbuf
instead, so we don't have to wonder if "1000" is big enough, or what
happens if we see a long line.

This also lets us drop our custom code to trim the newline.

Probably nobody actually cares about the 1000-char limit (after all, the
lines generally only say "P pack-[0-9a-f]{40}.pack"), so this is mostly
just about cleanup/readability.

Signed-off-by: Jeff King <p...@peff.net>
---
 server-info.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/server-info.c b/server-info.c
index ba44cece7f..d4115fecbb 100644
--- a/server-info.c
+++ b/server-info.c
@@ -131,40 +131,38 @@ static int parse_pack_def(const char *packname, int 
old_cnt)
 static int read_pack_info_file(const char *infofile)
 {
        FILE *fp;
-       char line[1000];
+       struct strbuf line = STRBUF_INIT;
        int old_cnt = 0;
        int stale = 1;
 
        fp = fopen_or_warn(infofile, "r");
        if (!fp)
                return 1; /* nonexistent is not an error. */
 
-       while (fgets(line, sizeof(line), fp)) {
+       while (strbuf_getline(&line, fp) != EOF) {
                const char *arg;
-               int len = strlen(line);
-               if (len && line[len-1] == '\n')
-                       line[--len] = 0;
 
-               if (!len)
+               if (!line.len)
                        continue;
 
-               if (skip_prefix(line, "P ", &arg)) {
+               if (skip_prefix(line.buf, "P ", &arg)) {
                        /* P name */
                        if (parse_pack_def(arg, old_cnt++))
                                goto out_stale;
-               } else if (line[0] == 'D') {
+               } else if (line.buf[0] == 'D') {
                        /* we used to emit D but that was misguided. */
                        goto out_stale;
-               } else if (line[0] == 'T') {
+               } else if (line.buf[0] == 'T') {
                        /* we used to emit T but nobody uses it. */
                        goto out_stale;
                } else {
-                       error("unrecognized: %s", line);
+                       error("unrecognized: %s", line.buf);
                }
        }
        stale = 0;
 
  out_stale:
+       strbuf_release(&line);
        fclose(fp);
        return stale;
 }
-- 
2.21.0.714.gd1be1d035b