diff options
Diffstat (limited to 'builtin-apply.c')
| -rw-r--r-- | builtin-apply.c | 59 |
1 files changed, 57 insertions, 2 deletions
diff --git a/builtin-apply.c b/builtin-apply.c index 12f00e38db..c7d4bdd474 100644 --- a/builtin-apply.c +++ b/builtin-apply.c @@ -28,6 +28,7 @@ static int newfd = -1; static int unidiff_zero; static int p_value = 1; +static int p_value_known; static int check_index; static int write_index; static int cached; @@ -312,11 +313,54 @@ static char *find_name(const char *line, char *def, int p_value, int terminate) return name; } +static int count_slashes(const char *cp) +{ + int cnt = 0; + char ch; + + while ((ch = *cp++)) + if (ch == '/') + cnt++; + return cnt; +} + +/* + * Given the string after "--- " or "+++ ", guess the appropriate + * p_value for the given patch. + */ +static int guess_p_value(const char *nameline) +{ + char *name, *cp; + int val = -1; + + if (is_dev_null(nameline)) + return -1; + name = find_name(nameline, NULL, 0, TERM_SPACE | TERM_TAB); + if (!name) + return -1; + cp = strchr(name, '/'); + if (!cp) + val = 0; + else if (prefix) { + /* + * Does it begin with "a/$our-prefix" and such? Then this is + * very likely to apply to our directory. + */ + if (!strncmp(name, prefix, prefix_length)) + val = count_slashes(prefix); + else { + cp++; + if (!strncmp(cp, prefix, prefix_length)) + val = count_slashes(prefix) + 1; + } + } + free(name); + return val; +} + /* * Get the name etc info from the --/+++ lines of a traditional patch header * - * NOTE! This hardcodes "-p1" behaviour in filename detection. - * * FIXME! The end-of-filename heuristics are kind of screwy. For existing * files, we can happily check the index for a match, but for creating a * new file we should try to match whatever "patch" does. I have no idea. @@ -327,6 +371,16 @@ static void parse_traditional_patch(const char *first, const char *second, struc first += 4; /* skip "--- " */ second += 4; /* skip "+++ " */ + if (!p_value_known) { + int p, q; + p = guess_p_value(first); + q = guess_p_value(second); + if (p < 0) p = q; + if (0 <= p && p == q) { + p_value = p; + p_value_known = 1; + } + } if (is_dev_null(first)) { patch->is_new = 1; patch->is_delete = 0; @@ -2656,6 +2710,7 @@ int cmd_apply(int argc, const char **argv, const char *unused_prefix) } if (!strncmp(arg, "-p", 2)) { p_value = atoi(arg + 2); + p_value_known = 1; continue; } if (!strcmp(arg, "--no-add")) { |