[PATCH v2 0/7] CMake(Visual C) support for js/doc-unit-tests

The recent patch series that adds proper unit testing to Git requires a couple of add-on patches to make it work with the CMake build on Windows (Visual C). This patch series aims to provide that support.

This patch series is based on js/doc-unit-tests.

Changes since v1:

 * The code added to test-lib.c now avoids using a strbuf.
 * The unit tests are now also handled via CTest.
 * While at it, I cleaned up a little in the CTest-related definitions.

Johannes Schindelin (7):
  cmake: also build unit tests
  unit-tests: do not mistake `.pdb` files for being executable
  unit-tests: do show relative file paths
  artifacts-tar: when including `.dll` files, don't forget the
    unit-tests
  cmake: fix typo in variable name
  cmake: use test names instead of full paths
  cmake: handle also unit tests

 Makefile                            |  2 +-
 contrib/buildsystems/CMakeLists.txt | 38 ++++++++++++++++++---
 t/Makefile                          |  2 +-
 t/unit-tests/test-lib.c             | 52 ++++++++++++++++++++++++++---
 4 files changed, 84 insertions(+), 10 deletions(-)

base-commit: 03f9bc407975bba86d1d1807519d76e1693ff66f
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1579%2Fdscho%2Fdoc-unit-tests-and-cmake-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1579/dscho/doc-unit-tests-and-cmake-v2
Pull-Request: https://github.com/gitgitgadget/git/pull/1579

Range-diff vs v1:

 1:  2cc1c03d851 = 1:  2cc1c03d851 cmake: also build unit tests
 2:  90db3d5d41f = 2:  90db3d5d41f unit-tests: do not mistake `.pdb` files for being executable
 3:  2b4e36c05c9 ! 3:  f0b804129e8 unit-tests: do show relative file paths
     @@ t/unit-tests/test-lib.c: static struct {
      + * Visual C interpolates the absolute Windows path for `__FILE__`,
      + * but we want to see relative paths, as verified by t0080.
      + */
     -+#include "strbuf.h"
      +#include "dir.h"
      +
      +static const char *make_relative(const char *location)
      +{
     -+	static const char *prefix;
     ++	static char prefix[] = __FILE__, buf[PATH_MAX], *p;
      +	static size_t prefix_len;
     -+	static struct strbuf buf = STRBUF_INIT;
      +
     -+	if (!prefix) {
     -+		strbuf_addstr(&buf, __FILE__);
     -+		if (!strbuf_strip_suffix(&buf, "\\t\\unit-tests\\test-lib.c"))
     -+			die("unexpected suffix of '%s'");
     -+		strbuf_complete(&buf, '\\');
     -+		prefix = strbuf_detach(&buf, &prefix_len);
     ++	if (!prefix_len) {
     ++		size_t len = strlen(prefix);
     ++		const char *needle = "\\t\\unit-tests\\test-lib.c";
     ++		size_t needle_len = strlen(needle);
     ++
     ++		if (len < needle_len || strcmp(needle, prefix + len - needle_len))
     ++			die("unexpected suffix of '%s'", prefix);
     ++
     ++		/* let it end in a directory separator */
     ++		prefix_len = len - needle_len + 1;
      +	}
      +
      +	/* Does it not start with the expected prefix? */
      +	if (fspathncmp(location, prefix, prefix_len))
      +		return location;
      +
     -+	strbuf_reset(&buf);
     -+	strbuf_addstr(&buf, location + prefix_len);
     -+	convert_slashes(buf.buf);
     ++	strlcpy(buf, location + prefix_len, sizeof(buf));
     ++	/* convert backslashes to forward slashes */
     ++	for (p = buf; *p; p++)
     ++		if (*p == '\\')
     ++			*p = '/';
      +
     -+	return buf.buf;
     ++	return buf;
      +}
      +#endif
      +
 4:  fb03f5aa6e5 = 4:  a70339f57a7 artifacts-tar: when including `.dll` files, don't forget the unit-tests
 -:  ----------- > 5:  75a74571fbe cmake: fix typo in variable name
 -:  ----------- > 6:  41228df1b46 cmake: use test names instead of full paths
 -:  ----------- > 7:  003d44e9f0d cmake: handle also unit tests