enable index-pack streaming capability
[gitweb.git] / blame.c
diff --git a/blame.c b/blame.c
index 47471e88897a5c03fa59ecbfe4b7f6cd7619a918..e664813cb48f555fa8968995eda4170a02a99f42 100644 (file)
--- a/blame.c
+++ b/blame.c
 #include "diffcore.h"
 #include "revision.h"
 #include "xdiff-interface.h"
+#include "quote.h"
 
 #define DEBUG 0
 
 static const char blame_usage[] =
-"git-blame [-c] [-l] [-t] [-S <revs-file>] [--] file [commit]\n"
+"git-blame [-c] [-l] [-t] [-f] [-n] [-p] [-S <revs-file>] [--] file [commit]\n"
 "  -c, --compatibility Use the same output mode as git-annotate (Default: off)\n"
 "  -l, --long          Show long commit SHA1 (Default: off)\n"
 "  -t, --time          Show raw timestamp (Default: off)\n"
-"  -S, --revs-file     Use revisions from revs-file instead of calling git-rev-list\n"
+"  -f, --show-name     Show original filename (Default: auto)\n"
+"  -n, --show-number   Show original linenumber (Default: off)\n"
+"  -p, --porcelain     Show in a format designed for machine consumption\n"
+"  -S revs-file        Use revisions from revs-file instead of calling git-rev-list\n"
 "  -h, --help          This message";
 
 static struct commit **blame_lines;
@@ -40,6 +44,7 @@ struct util_info {
        unsigned long size;
        int num_lines;
        const char *pathname;
+       unsigned meta_given:1;
 
        void *topo_data;
 };
@@ -332,12 +337,8 @@ static struct util_info *get_util(struct commit *commit)
        if (util)
                return util;
 
-       util = xmalloc(sizeof(struct util_info));
-       util->buf = NULL;
-       util->size = 0;
-       util->line_map = NULL;
+       util = xcalloc(1, sizeof(struct util_info));
        util->num_lines = -1;
-       util->pathname = NULL;
        commit->util = util;
        return util;
 }
@@ -642,39 +643,99 @@ struct commit_info
        char *author_mail;
        unsigned long author_time;
        char *author_tz;
+
+       /* filled only when asked for details */
+       char *committer;
+       char *committer_mail;
+       unsigned long committer_time;
+       char *committer_tz;
+
+       char *summary;
 };
 
-static void get_commit_info(struct commit *commit, struct commit_info *ret)
+static void get_ac_line(const char *inbuf, const char *what,
+                       int bufsz, char *person, char **mail,
+                       unsigned long *time, char **tz)
 {
        int len;
-       char *tmp;
-       static char author_buf[1024];
-
-       tmp = strstr(commit->buffer, "\nauthor ") + 8;
-       len = strchr(tmp, '\n') - tmp;
-       ret->author = author_buf;
-       memcpy(ret->author, tmp, len);
+       char *tmp, *endp;
+
+       tmp = strstr(inbuf, what);
+       if (!tmp)
+               goto error_out;
+       tmp += strlen(what);
+       endp = strchr(tmp, '\n');
+       if (!endp)
+               len = strlen(tmp);
+       else
+               len = endp - tmp;
+       if (bufsz <= len) {
+       error_out:
+               /* Ugh */
+               person = *mail = *tz = "(unknown)";
+               *time = 0;
+               return;
+       }
+       memcpy(person, tmp, len);
 
-       tmp = ret->author;
+       tmp = person;
        tmp += len;
        *tmp = 0;
        while (*tmp != ' ')
                tmp--;
-       ret->author_tz = tmp+1;
+       *tz = tmp+1;
 
        *tmp = 0;
        while (*tmp != ' ')
                tmp--;
-       ret->author_time = strtoul(tmp, NULL, 10);
+       *time = strtoul(tmp, NULL, 10);
 
        *tmp = 0;
        while (*tmp != ' ')
                tmp--;
-       ret->author_mail = tmp + 1;
-
+       *mail = tmp + 1;
        *tmp = 0;
 }
 
+static void get_commit_info(struct commit *commit, struct commit_info *ret, int detailed)
+{
+       int len;
+       char *tmp, *endp;
+       static char author_buf[1024];
+       static char committer_buf[1024];
+       static char summary_buf[1024];
+
+       ret->author = author_buf;
+       get_ac_line(commit->buffer, "\nauthor ",
+                   sizeof(author_buf), author_buf, &ret->author_mail,
+                   &ret->author_time, &ret->author_tz);
+
+       if (!detailed)
+               return;
+
+       ret->committer = committer_buf;
+       get_ac_line(commit->buffer, "\ncommitter ",
+                   sizeof(committer_buf), committer_buf, &ret->committer_mail,
+                   &ret->committer_time, &ret->committer_tz);
+
+       ret->summary = summary_buf;
+       tmp = strstr(commit->buffer, "\n\n");
+       if (!tmp) {
+       error_out:
+               sprintf(summary_buf, "(%s)", sha1_to_hex(commit->object.sha1));
+               return;
+       }
+       tmp += 2;
+       endp = strchr(tmp, '\n');
+       if (!endp)
+               goto error_out;
+       len = endp - tmp;
+       if (len >= sizeof(summary_buf))
+               goto error_out;
+       memcpy(summary_buf, tmp, len);
+       summary_buf[len] = 0;
+}
+
 static const char *format_time(unsigned long time, const char *tz_str,
                               int show_raw_time)
 {
@@ -751,7 +812,7 @@ static int find_orig_linenum(struct util_info *u, int lineno)
 }
 
 static void emit_meta(struct commit *c, int lno,
-                     int sha1_len, int compatibility,
+                     int sha1_len, int compatibility, int porcelain,
                      int show_name, int show_number, int show_raw_time,
                      int longest_file, int longest_author,
                      int max_digits, int max_orig_digits)
@@ -763,7 +824,47 @@ static void emit_meta(struct commit *c, int lno,
        u = c->util;
        lineno = find_orig_linenum(u, lno);
 
-       get_commit_info(c, &ci);
+       if (porcelain) {
+               int group_size = -1;
+               struct commit *cc = (lno == 0) ? NULL : blame_lines[lno-1];
+               if (cc != c) {
+                       /* This is the beginning of this group */
+                       int i;
+                       for (i = lno + 1; i < num_blame_lines; i++)
+                               if (blame_lines[i] != c)
+                                       break;
+                       group_size = i - lno;
+               }
+               if (0 < group_size)
+                       printf("%s %d %d %d\n", sha1_to_hex(c->object.sha1),
+                              lineno, lno + 1, group_size);
+               else
+                       printf("%s %d %d\n", sha1_to_hex(c->object.sha1),
+                              lineno, lno + 1);
+               if (!u->meta_given) {
+                       get_commit_info(c, &ci, 1);
+                       printf("author %s\n", ci.author);
+                       printf("author-mail %s\n", ci.author_mail);
+                       printf("author-time %lu\n", ci.author_time);
+                       printf("author-tz %s\n", ci.author_tz);
+                       printf("committer %s\n", ci.committer);
+                       printf("committer-mail %s\n", ci.committer_mail);
+                       printf("committer-time %lu\n", ci.committer_time);
+                       printf("committer-tz %s\n", ci.committer_tz);
+                       printf("filename ");
+                       if (quote_c_style(u->pathname, NULL, NULL, 0))
+                               quote_c_style(u->pathname, NULL, stdout, 0);
+                       else
+                               fputs(u->pathname, stdout);
+                       printf("\nsummary %s\n", ci.summary);
+
+                       u->meta_given = 1;
+               }
+               putchar('\t');
+               return;
+       }
+
+       get_commit_info(c, &ci, 0);
        fwrite(sha1_to_hex(c->object.sha1), sha1_len, 1, stdout);
        if (compatibility) {
                printf("\t(%10s\t%10s\t%d)", ci.author,
@@ -809,6 +910,7 @@ int main(int argc, const char **argv)
        int longest_file, longest_author, longest_file_lines;
        int show_name = 0;
        int show_number = 0;
+       int porcelain = 0;
 
        const char *prefix = setup_git_directory();
        git_config(git_default_config);
@@ -852,6 +954,13 @@ int main(int argc, const char **argv)
                                show_number = 1;
                                continue;
                        }
+                       if (!strcmp(argv[i], "-p") ||
+                           !strcmp(argv[i], "--porcelain")) {
+                               porcelain = 1;
+                               sha1_len = 40;
+                               show_raw_time = 1;
+                               continue;
+                       }
                        if (!strcmp(argv[i], "--")) {
                                options = 0;
                                continue;
@@ -934,7 +1043,7 @@ int main(int argc, const char **argv)
                        longest_file = strlen(u->pathname);
                if (longest_file_lines < u->num_lines)
                        longest_file_lines = u->num_lines;
-               get_commit_info(c, &ci);
+               get_commit_info(c, &ci, 0);
                if (longest_author < strlen(ci.author))
                        longest_author = strlen(ci.author);
        }
@@ -943,7 +1052,7 @@ int main(int argc, const char **argv)
 
        for (i = 0; i < num_blame_lines; i++) {
                emit_meta(blame_lines[i], i,
-                         sha1_len, compatibility,
+                         sha1_len, compatibility, porcelain,
                          show_name, show_number, show_raw_time,
                          longest_file, longest_author,
                          max_digits, max_orig_digits);