[PATCH] git-ssh-pull: commit-id consistency
[git.git] / apply.c
diff --git a/apply.c b/apply.c
index 7d9059b..c81b0a2 100644 (file)
--- a/apply.c
+++ b/apply.c
@@ -28,10 +28,11 @@ static int merge_patch = 1;
 static int check_index = 0;
 static int write_index = 0;
 static int diffstat = 0;
+static int summary = 0;
 static int check = 0;
 static int apply = 1;
 static int show_files = 0;
-static const char apply_usage[] = "git-apply [--stat] [--check] [--show-files] <patch>";
+static const char apply_usage[] = "git-apply [--stat] [--summary] [--check] [--show-files] <patch>";
 
 /*
  * For "diff-stat" like behaviour, we keep track of the biggest change
@@ -60,6 +61,7 @@ struct patch {
        unsigned int old_mode, new_mode;
        int is_rename, is_copy, is_new, is_delete;
        int lines_added, lines_deleted;
+       int score;
        struct fragment *fragments;
        char *result;
        unsigned long resultsize;
@@ -329,11 +331,15 @@ static int gitdiff_renamedst(const char *line, struct patch *patch)
 
 static int gitdiff_similarity(const char *line, struct patch *patch)
 {
+       if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
+               patch->score = 0;
        return 0;
 }
 
 static int gitdiff_dissimilarity(const char *line, struct patch *patch)
 {
+       if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
+               patch->score = 0;
        return 0;
 }
 
@@ -723,11 +729,11 @@ const char minuses[]= "---------------------------------------------------------
 
 static void show_stats(struct patch *patch)
 {
-       char *name = patch->old_name;
+       char *name = patch->new_name;
        int len, max, add, del, total;
 
        if (!name)
-               name = patch->new_name;
+               name = patch->old_name;
 
        /*
         * "scale" the filename
@@ -751,9 +757,11 @@ static void show_stats(struct patch *patch)
        del = patch->lines_deleted;
        total = add + del;
 
-       total = (total * max + max_change / 2) / max_change;
-       add = (add * max + max_change / 2) / max_change;
-       del = total - add;
+       if (max_change > 0) {
+               total = (total * max + max_change / 2) / max_change;
+               add = (add * max + max_change / 2) / max_change;
+               del = total - add;
+       }
        printf(" %-*s |%5d %.*s%.*s\n",
                len, name, patch->lines_added + patch->lines_deleted,
                add, pluses, del, minuses);
@@ -852,7 +860,6 @@ static int find_offset(const char *buf, unsigned long size, const char *fragment
                n = (i >> 1)+1;
                if (i & 1)
                        n = -n;
-               fprintf(stderr, "Fragment applied at offset %d\n", n);
                return try;
        }
 
@@ -1091,6 +1098,84 @@ static void stat_patch_list(struct patch *patch)
        printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels);
 }
 
+static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
+{
+       if (mode)
+               printf(" %s mode %06o %s\n", newdelete, mode, name);
+       else
+               printf(" %s %s\n", newdelete, name);
+}
+
+static void show_mode_change(struct patch *p, int show_name)
+{
+       if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
+               if (show_name)
+                       printf(" mode change %06o => %06o %s\n",
+                              p->old_mode, p->new_mode, p->new_name);
+               else
+                       printf(" mode change %06o => %06o\n",
+                              p->old_mode, p->new_mode);
+       }
+}
+
+static void show_rename_copy(struct patch *p)
+{
+       const char *renamecopy = p->is_rename ? "rename" : "copy";
+       const char *old, *new;
+
+       /* Find common prefix */
+       old = p->old_name;
+       new = p->new_name;
+       while (1) {
+               const char *slash_old, *slash_new;
+               slash_old = strchr(old, '/');
+               slash_new = strchr(new, '/');
+               if (!slash_old ||
+                   !slash_new ||
+                   slash_old - old != slash_new - new ||
+                   memcmp(old, new, slash_new - new))
+                       break;
+               old = slash_old + 1;
+               new = slash_new + 1;
+       }
+       /* p->old_name thru old is the common prefix, and old and new
+        * through the end of names are renames
+        */
+       if (old != p->old_name)
+               printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
+                      old - p->old_name, p->old_name,
+                      old, new, p->score);
+       else
+               printf(" %s %s => %s (%d%%)\n", renamecopy,
+                      p->old_name, p->new_name, p->score);
+       show_mode_change(p, 0);
+}
+
+static void summary_patch_list(struct patch *patch)
+{
+       struct patch *p;
+
+       for (p = patch; p; p = p->next) {
+               if (p->is_new)
+                       show_file_mode_name("create", p->new_mode, p->new_name);
+               else if (p->is_delete)
+                       show_file_mode_name("delete", p->old_mode, p->old_name);
+               else {
+                       if (p->is_rename || p->is_copy)
+                               show_rename_copy(p);
+                       else {
+                               if (p->score) {
+                                       printf(" rewrite %s (%d%%)\n",
+                                              p->new_name, p->score);
+                                       show_mode_change(p, 0);
+                               }
+                               else
+                                       show_mode_change(p, 1);
+                       }
+               }
+       }
+}
+
 static void patch_stats(struct patch *patch)
 {
        int lines = patch->lines_added + patch->lines_deleted;
@@ -1142,6 +1227,51 @@ static void add_index_file(const char *path, unsigned mode, void *buf, unsigned
                die("unable to add cache entry for %s", path);
 }
 
+static void create_subdirectories(const char *path)
+{
+       int len = strlen(path);
+       char *buf = xmalloc(len + 1);
+       const char *slash = path;
+
+       while ((slash = strchr(slash+1, '/')) != NULL) {
+               len = slash - path;
+               memcpy(buf, path, len);
+               buf[len] = 0;
+               if (mkdir(buf, 0755) < 0) {
+                       if (errno != EEXIST)
+                               break;
+               }
+       }
+       free(buf);
+}
+
+/*
+ * We optimistically assume that the directories exist,
+ * which is true 99% of the time anyway. If they don't,
+ * we create them and try again.
+ */
+static int create_regular_file(const char *path, unsigned int mode)
+{
+       int ret = open(path, O_WRONLY | O_CREAT | O_TRUNC, mode);
+
+       if (ret < 0 && errno == ENOENT) {
+               create_subdirectories(path);
+               ret = open(path, O_WRONLY | O_CREAT | O_TRUNC, mode);
+       }
+       return ret;
+}
+
+static int create_symlink(const char *buf, const char *path)
+{
+       int ret = symlink(buf, path);
+
+       if (ret < 0 && errno == ENOENT) {
+               create_subdirectories(path);
+               ret = symlink(buf, path);
+       }
+       return ret;
+}
+
 static void create_file(struct patch *patch)
 {
        const char *path = patch->new_name;
@@ -1154,7 +1284,7 @@ static void create_file(struct patch *patch)
        if (S_ISREG(mode)) {
                int fd;
                mode = (mode & 0100) ? 0777 : 0666;
-               fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, mode);
+               fd = create_regular_file(path, mode);
                if (fd < 0)
                        die("unable to create file %s (%s)", path, strerror(errno));
                if (write(fd, buf, size) != size)
@@ -1167,7 +1297,7 @@ static void create_file(struct patch *patch)
                if (size && buf[size-1] == '\n')
                        size--;
                buf[size] = 0;
-               if (symlink(buf, path) < 0)
+               if (create_symlink(buf, path) < 0)
                        die("unable to write symlink %s", path);
                add_index_file(path, mode, buf, size);
                return;
@@ -1259,6 +1389,9 @@ static int apply_patch(int fd)
        if (diffstat)
                stat_patch_list(list);
 
+       if (summary)
+               summary_patch_list(list);
+
        free(buffer);
        return 0;
 }
@@ -1286,6 +1419,11 @@ int main(int argc, char **argv)
                        diffstat = 1;
                        continue;
                }
+               if (!strcmp(arg, "--summary")) {
+                       apply = 0;
+                       summary = 1;
+                       continue;
+               }
                if (!strcmp(arg, "--check")) {
                        apply = 0;
                        check = 1;
@@ -1295,6 +1433,10 @@ int main(int argc, char **argv)
                        check_index = 1;
                        continue;
                }
+               if (!strcmp(arg, "--apply")) {
+                       apply = 1;
+                       continue;
+               }
                if (!strcmp(arg, "--show-files")) {
                        show_files = 1;
                        continue;