Merge branch 'da/difftool' into maint
[gitweb.git] / builtin / blame.c
index 2b1f9dd6cd01be506c65441685b8d4b79cc74010..6cac59c973bfcf1dc48e2a1af26375f914bb02c4 100644 (file)
@@ -6,6 +6,7 @@
  */
 
 #include "cache.h"
+#include "refs.h"
 #include "builtin.h"
 #include "blob.h"
 #include "commit.h"
 #include "userdiff.h"
 #include "line-range.h"
 #include "line-log.h"
+#include "dir.h"
 
-static char blame_usage[] = N_("git blame [options] [rev-opts] [rev] [--] file");
+static char blame_usage[] = N_("git blame [<options>] [<rev-opts>] [<rev>] [--] <file>");
 
 static const char *blame_opt_usage[] = {
        blame_usage,
        "",
-       N_("[rev-opts] are documented in git-rev-list(1)"),
+       N_("<rev-opts> are documented in git-rev-list(1)"),
        NULL
 };
 
@@ -49,7 +51,7 @@ static int xdl_opts;
 static int abbrev = -1;
 static int no_whole_file_rename;
 
-static enum date_mode blame_date_mode = DATE_ISO8601;
+static struct date_mode blame_date_mode = { DATE_ISO8601 };
 static size_t blame_date_width;
 
 static struct string_list mailmap;
@@ -972,7 +974,10 @@ static void pass_blame_to_parent(struct scoreboard *sb,
        fill_origin_blob(&sb->revs->diffopt, target, &file_o);
        num_get_patch++;
 
-       diff_hunks(&file_p, &file_o, 0, blame_chunk_cb, &d);
+       if (diff_hunks(&file_p, &file_o, 0, blame_chunk_cb, &d))
+               die("unable to generate diff (%s -> %s)",
+                   sha1_to_hex(parent->commit->object.sha1),
+                   sha1_to_hex(target->commit->object.sha1));
        /* The rest are the same as the parent */
        blame_chunk(&d.dstq, &d.srcq, INT_MAX, d.offset, INT_MAX, parent);
        *d.dstq = NULL;
@@ -1118,7 +1123,9 @@ static void find_copy_in_blob(struct scoreboard *sb,
         * file_p partially may match that image.
         */
        memset(split, 0, sizeof(struct blame_entry [3]));
-       diff_hunks(file_p, &file_o, 1, handle_split_cb, &d);
+       if (diff_hunks(file_p, &file_o, 1, handle_split_cb, &d))
+               die("unable to generate diff (%s)",
+                   sha1_to_hex(parent->commit->object.sha1));
        /* remainder, if any, all match the preimage */
        handle_split(sb, ent, d.tlno, d.plno, ent->num_lines, parent, split);
 }
@@ -1364,8 +1371,15 @@ static void pass_whole_blame(struct scoreboard *sb,
  */
 static struct commit_list *first_scapegoat(struct rev_info *revs, struct commit *commit)
 {
-       if (!reverse)
+       if (!reverse) {
+               if (revs->first_parent_only &&
+                   commit->parents &&
+                   commit->parents->next) {
+                       free_commit_list(commit->parents->next);
+                       commit->parents->next = NULL;
+               }
                return commit->parents;
+       }
        return lookup_decoration(&revs->children, &commit->object);
 }
 
@@ -1826,7 +1840,7 @@ static const char *format_time(unsigned long time, const char *tz_str,
                size_t time_width;
                int tz;
                tz = atoi(tz_str);
-               time_str = show_date(time, tz, blame_date_mode);
+               time_str = show_date(time, tz, &blame_date_mode);
                strbuf_addstr(&time_buf, time_str);
                /*
                 * Add space paddings to time_buf to display a fixed width
@@ -2151,16 +2165,6 @@ static void sanity_check_refcnt(struct scoreboard *sb)
        }
 }
 
-/*
- * Used for the command line parsing; check if the path exists
- * in the working tree.
- */
-static int has_string_in_work_tree(const char *path)
-{
-       struct stat st;
-       return !lstat(path, &st);
-}
-
 static unsigned parse_score(const char *arg)
 {
        char *end;
@@ -2185,10 +2189,18 @@ static int git_blame_config(const char *var, const char *value, void *cb)
                blank_boundary = git_config_bool(var, value);
                return 0;
        }
+       if (!strcmp(var, "blame.showemail")) {
+               int *output_option = cb;
+               if (git_config_bool(var, value))
+                       *output_option |= OUTPUT_SHOW_EMAIL;
+               else
+                       *output_option &= ~OUTPUT_SHOW_EMAIL;
+               return 0;
+       }
        if (!strcmp(var, "blame.date")) {
                if (!value)
                        return config_error_nonbool(var);
-               blame_date_mode = parse_date_format(value);
+               parse_date_format(value, &blame_date_mode);
                return 0;
        }
 
@@ -2227,20 +2239,19 @@ static struct commit_list **append_parent(struct commit_list **tail, const unsig
 static void append_merge_parents(struct commit_list **tail)
 {
        int merge_head;
-       const char *merge_head_file = git_path("MERGE_HEAD");
        struct strbuf line = STRBUF_INIT;
 
-       merge_head = open(merge_head_file, O_RDONLY);
+       merge_head = open(git_path_merge_head(), O_RDONLY);
        if (merge_head < 0) {
                if (errno == ENOENT)
                        return;
-               die("cannot open '%s' for reading", merge_head_file);
+               die("cannot open '%s' for reading", git_path_merge_head());
        }
 
        while (!strbuf_getwholeline_fd(&line, merge_head, '\n')) {
                unsigned char sha1[20];
                if (line.len < 40 || get_sha1_hex(line.buf, sha1))
-                       die("unknown line in '%s': %s", merge_head_file, line.buf);
+                       die("unknown line in '%s': %s", git_path_merge_head(), line.buf);
                tail = append_parent(tail, sha1);
        }
        close(merge_head);
@@ -2348,6 +2359,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
                if (strbuf_read(&buf, 0, 0) < 0)
                        die_errno("failed to read from stdin");
        }
+       convert_to_git(path, buf.buf, buf.len, &buf, 0);
        origin->file.ptr = buf.buf;
        origin->file.size = buf.len;
        pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_sha1);
@@ -2528,7 +2540,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
        unsigned int range_i;
        long anchor;
 
-       git_config(git_blame_config, NULL);
+       git_config(git_blame_config, &output_option);
        init_revisions(&revs, NULL);
        revs.date_mode = blame_date_mode;
        DIFF_OPT_SET(&revs.diffopt, ALLOW_TEXTCONV);
@@ -2569,13 +2581,13 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 
        if (cmd_is_annotate) {
                output_option |= OUTPUT_ANNOTATE_COMPAT;
-               blame_date_mode = DATE_ISO8601;
+               blame_date_mode.type = DATE_ISO8601;
        } else {
                blame_date_mode = revs.date_mode;
        }
 
        /* The maximum width used to show the dates */
-       switch (blame_date_mode) {
+       switch (blame_date_mode.type) {
        case DATE_RFC2822:
                blame_date_width = sizeof("Thu, 19 Oct 2006 16:00:04 -0700");
                break;
@@ -2604,6 +2616,9 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
        case DATE_NORMAL:
                blame_date_width = sizeof("Thu Oct 19 16:00:04 2006 -0700");
                break;
+       case DATE_STRFTIME:
+               blame_date_width = strlen(show_date(0, 0, &blame_date_mode)) + 1; /* add the null */
+               break;
        }
        blame_date_width -= 1; /* strip the null */
 
@@ -2655,14 +2670,14 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
                if (argc < 2)
                        usage_with_options(blame_opt_usage, options);
                path = add_prefix(prefix, argv[argc - 1]);
-               if (argc == 3 && !has_string_in_work_tree(path)) { /* (2b) */
+               if (argc == 3 && !file_exists(path)) { /* (2b) */
                        path = add_prefix(prefix, argv[1]);
                        argv[1] = argv[2];
                }
                argv[argc - 1] = "--";
 
                setup_work_tree();
-               if (!has_string_in_work_tree(path))
+               if (!file_exists(path))
                        die_errno("cannot stat path '%s'", path);
        }
 
@@ -2676,7 +2691,9 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
                sb.commits.compare = compare_commits_by_commit_date;
        }
        else if (contents_from)
-               die("--contents and --children do not blend well.");
+               die("--contents and --reverse do not blend well.");
+       else if (revs.first_parent_only)
+               die("combining --first-parent and --reverse is not supported");
        else {
                final_commit_name = prepare_initial(&sb);
                sb.commits.compare = compare_commits_by_reverse_commit_date;