[PATCH v4 0/2] cat-file: quote-format name in error when using -z

Hi,

This is the fourth revision of my patch to fix the error message for git-cat-file(1) when using --batch and -z.

I was asked to provide test coverage for both code paths that produce this kind of error message. Instead I've decided to extract the error formatting into a separate function. For two reasons:

 * It deduplicates code.

 * The code path that was not tested is hit by --batch-all-objects. I was not
  able to set up a test that hits that code. I'm happy to write that test, if
  anyone can give me a pointer how to produce a "missing" error with that
  option.

Toon

Toon Claes (2):
  cat-file: extract printing batch error message into function
  cat-file: quote-format name in error when using -z

 builtin/cat-file.c  | 71 +++++++++++++++++++++++++++------------------
 t/t1006-cat-file.sh |  8 +++++
 2 files changed, 51 insertions(+), 28 deletions(-)

Range-diff against v3:
-:  ---------- > 1:  b2f4ce88f2 cat-file: extract printing batch error message into function
1:  a56932572c ! 2:  9e31796dc1 cat-file: quote-format name in error when using -z
    @@ builtin/cat-file.c
      #include "object-store.h"
      #include "promisor-remote.h"
      #include "mailmap.h"
    -@@ builtin/cat-file.c: static void batch_object_write(const char *obj_name,
    - 						       &data->oid, &data->info,
    - 						       OBJECT_INFO_LOOKUP_REPLACE);
    - 		if (ret < 0) {
    -+			struct strbuf quoted = STRBUF_INIT;
    -+
    -+			if (opt->nul_terminated &&
    -+			    obj_name) {
    -+				quote_c_style(obj_name, &quoted, NULL, 0);
    -+				obj_name = quoted.buf;
    -+			}
    -+
    - 			printf("%s missing\n",
    - 			       obj_name ? obj_name : oid_to_hex(&data->oid));
    -+			strbuf_release(&quoted);
    - 			fflush(stdout);
    - 			return;
    - 		}
    -@@ builtin/cat-file.c: static void batch_one_object(const char *obj_name,
    - 	result = get_oid_with_context(the_repository, obj_name,
    - 				      flags, &data->oid, &ctx);
    - 	if (result != FOUND) {
    +@@ builtin/cat-file.c: static void batch_print_error(const char *obj_name,
    + 			      enum get_oid_result result,
    + 			      struct batch_options* opt)
    + {
     +		struct strbuf quoted = STRBUF_INIT;
     +
    -+		if (opt->nul_terminated) {
    ++		if (opt->nul_terminated &&
    ++		    obj_name) {
     +			quote_c_style(obj_name, &quoted, NULL, 0);
     +			obj_name = quoted.buf;
     +		}
    @@ builtin/cat-file.c: static void batch_one_object(const char *obj_name,
      		switch (result) {
      		case MISSING_OBJECT:
      			printf("%s missing\n", obj_name);
    -@@ builtin/cat-file.c: static void batch_one_object(const char *obj_name,
    - 			       result);
    +@@ builtin/cat-file.c: static void batch_print_error(const char *obj_name,
      			break;
      		}
    -+
    -+		strbuf_release(&quoted);
      		fflush(stdout);
    - 		return;
    - 	}
    ++		strbuf_release(&quoted);
    + }
    +
    + /*

      ## t/t1006-cat-file.sh ##
     @@ t/t1006-cat-file.sh: test_expect_success FUNNYNAMES '--batch-check, -z with newline in input' '
--
2.39.2