> > We know which separator we're expecting so we could replace the last > two comparisons with > > prefix[prefix_len -1] != needle[1] > > but as I say I'm not sure that is worth re-rolling for There is a larger clean-up opportunity to drop the need for making a copy, which probably is worth doing, so I folded the above into this version. ------- >8 ------------- >8 ------------- >8 ------------- >8 ------- There are compilers other than Visual C that want to show absolute paths. Generalize the helper introduced by a2c5e294 (unit-tests: do show relative file paths, 2023-09-25) so that it can also work with a path that uses slash as the directory separator, and becomes almost no-op once one-time preparation finds out that we are using a compiler that already gives relative paths. Incidentally, this also should do the right thing on Windows with a compiler that shows relative paths but with backslash as the directory separator (if such a thing exists and is used to build git). Reported-by: Randall S. Becker <rsbecker@xxxxxxxxxxxxx> Helped-by: Phillip Wood <phillip.wood@xxxxxxxxxxxxx> Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx> --- * I found that the diff relative to the result of applying v1 was easier to follow than the range-diff, so here it is. diff --git c/t/unit-tests/test-lib.c w/t/unit-tests/test-lib.c index 83c9eb8c59..66d6980ffb 100644 --- c/t/unit-tests/test-lib.c +++ w/t/unit-tests/test-lib.c @@ -64,34 +64,33 @@ static const char *make_relative(const char *location) * prefix_len == 0 if the compiler gives paths relative * to the root of the working tree. Otherwise, we want * to see that we did find the needle[] at a directory - * boundary. + * boundary. Again we rely on that needle[] begins with + * "t" followed by the directory separator. */ if (fspathcmp(needle, prefix + prefix_len) || - (prefix_len && - prefix[prefix_len - 1] != '/' && - prefix[prefix_len - 1] != '\\')) + (prefix_len && prefix[prefix_len - 1] != needle[1])) die("unexpected suffix of '%s'", prefix); - } /* - * If our compiler gives relative paths and we do not need - * to munge directory separator, we can return location as-is. + * Does it not start with the expected prefix? + * Return it as-is without making it worse. */ - if (!prefix_len && !need_bs_to_fs) + if (prefix_len && fspathncmp(location, prefix, prefix_len)) return location; - /* Does it not start with the expected prefix? */ - if (fspathncmp(location, prefix, prefix_len)) - return location; + /* + * If we do not need to munge directory separator, we can return + * the substring at the tail of the location. + */ + if (!need_bs_to_fs) + return location + prefix_len; - strlcpy(buf, location + prefix_len, sizeof(buf)); /* convert backslashes to forward slashes */ - if (need_bs_to_fs) { - for (p = buf; *p; p++) - if (*p == '\\') - *p = '/'; - } + strlcpy(buf, location + prefix_len, sizeof(buf)); + for (p = buf; *p; p++) + if (*p == '\\') + *p = '/'; return buf; } t/unit-tests/test-lib.c | 61 +++++++++++++++++++++++++++++++---------- 1 file changed, 47 insertions(+), 14 deletions(-) diff --git a/t/unit-tests/test-lib.c b/t/unit-tests/test-lib.c index 7bf9dfdb95..66d6980ffb 100644 --- a/t/unit-tests/test-lib.c +++ b/t/unit-tests/test-lib.c @@ -21,12 +21,11 @@ static struct { .result = RESULT_NONE, }; -#ifndef _MSC_VER -#define make_relative(location) location -#else /* * Visual C interpolates the absolute Windows path for `__FILE__`, * but we want to see relative paths, as verified by t0080. + * There are other compilers that do the same, and are not for + * Windows. */ #include "dir.h" @@ -34,32 +33,66 @@ static const char *make_relative(const char *location) { static char prefix[] = __FILE__, buf[PATH_MAX], *p; static size_t prefix_len; + static int need_bs_to_fs = -1; - if (!prefix_len) { + /* one-time preparation */ + if (need_bs_to_fs < 0) { size_t len = strlen(prefix); - const char *needle = "\\t\\unit-tests\\test-lib.c"; + 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); + if (len < needle_len) + die("unexpected prefix '%s'", prefix); + + /* + * The path could be relative (t/unit-tests/test-lib.c) + * or full (/home/user/git/t/unit-tests/test-lib.c). + * Check the slash between "t" and "unit-tests". + */ + prefix_len = len - needle_len; + if (prefix[prefix_len + 1] == '/') { + /* Oh, we're not Windows */ + for (size_t i = 0; i < needle_len; i++) + if (needle[i] == '\\') + needle[i] = '/'; + need_bs_to_fs = 0; + } else { + need_bs_to_fs = 1; + } - /* let it end in a directory separator */ - prefix_len = len - needle_len + 1; + /* + * prefix_len == 0 if the compiler gives paths relative + * to the root of the working tree. Otherwise, we want + * to see that we did find the needle[] at a directory + * boundary. Again we rely on that needle[] begins with + * "t" followed by the directory separator. + */ + if (fspathcmp(needle, prefix + prefix_len) || + (prefix_len && prefix[prefix_len - 1] != needle[1])) + die("unexpected suffix of '%s'", prefix); } - /* Does it not start with the expected prefix? */ - if (fspathncmp(location, prefix, prefix_len)) + /* + * Does it not start with the expected prefix? + * Return it as-is without making it worse. + */ + if (prefix_len && fspathncmp(location, prefix, prefix_len)) return location; - strlcpy(buf, location + prefix_len, sizeof(buf)); + /* + * If we do not need to munge directory separator, we can return + * the substring at the tail of the location. + */ + if (!need_bs_to_fs) + return location + prefix_len; + /* convert backslashes to forward slashes */ + strlcpy(buf, location + prefix_len, sizeof(buf)); for (p = buf; *p; p++) if (*p == '\\') *p = '/'; - return buf; } -#endif static void msg_with_prefix(const char *prefix, const char *format, va_list ap) { -- 2.44.0-rc0