On Mon, Jan 25, 2021 at 06:37:22PM -0500, Taylor Blau wrote: > To derive the filename for a .idx file, 'git index-pack' uses > derive_filename() to strip the '.pack' suffix and add the new suffix. > > Prepare for stripping off suffixes other than '.pack' by making the > suffix to strip a parameter of derive_filename(). In order to make this > consistent with the "suffix" parameter which does not begin with a ".", > an additional check in derive_filename. Maybe "add" missing from the final line? > +static const char *derive_filename(const char *pack_name, const char *strip, > + const char *suffix, struct strbuf *buf) > { > size_t len; > - if (!strip_suffix(pack_name, ".pack", &len)) > - die(_("packfile name '%s' does not end with '.pack'"), > - pack_name); > + if (!strip_suffix(pack_name, strip, &len) || !len || > + pack_name[len - 1] != '.') > + die(_("packfile name '%s' does not end with '.%s'"), > + pack_name, strip); > strbuf_add(buf, pack_name, len); > - strbuf_addch(buf, '.'); Looks good to me. -Peff