diff options
| -rw-r--r-- | Documentation/git-pickaxe.txt | 10 | ||||
| -rw-r--r-- | builtin-pickaxe.c | 95 |
2 files changed, 102 insertions, 3 deletions
diff --git a/Documentation/git-pickaxe.txt b/Documentation/git-pickaxe.txt index ebae20ff33..6d22fd9e99 100644 --- a/Documentation/git-pickaxe.txt +++ b/Documentation/git-pickaxe.txt @@ -9,7 +9,7 @@ SYNOPSIS -------- [verse] 'git-pickaxe' [-c] [-l] [-t] [-f] [-n] [-p] [-L n,m] [-S <revs-file>] - [-M] [--since=<date>] [<rev>] [--] <file> + [-M] [-C] [-C] [--since=<date>] [<rev>] [--] <file> DESCRIPTION ----------- @@ -73,6 +73,14 @@ OPTIONS to the child commit. With this option, both groups of lines are blamed on the parent. +-C:: + In addition to `-M`, detect lines copied from other + files that were modified in the same commit. This is + useful when you reorganize your program and move code + around across files. When this option is given twice, + the command looks for copies from all other files in the + parent for the commit that creates the file in addition. + -h, --help:: Show help message. diff --git a/builtin-pickaxe.c b/builtin-pickaxe.c index e6ce6551d0..74c7c9a33b 100644 --- a/builtin-pickaxe.c +++ b/builtin-pickaxe.c @@ -19,7 +19,7 @@ #include <sys/time.h> static char pickaxe_usage[] = -"git-pickaxe [-c] [-l] [-t] [-f] [-n] [-p] [-L n,m] [-S <revs-file>] [-M] [commit] [--] file\n" +"git-pickaxe [-c] [-l] [-t] [-f] [-n] [-p] [-L n,m] [-S <revs-file>] [-M] [-C] [-C] [commit] [--] file\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" @@ -27,7 +27,7 @@ static char pickaxe_usage[] = " -n, --show-number Show original linenumber (Default: off)\n" " -p, --porcelain Show in a format designed for machine consumption\n" " -L n,m Process only line range n,m, counting from 1\n" -" -M Find line movements within the file\n" +" -M, -C Find line movements within and across files\n" " -S revs-file Use revisions from revs-file instead of calling git-rev-list\n"; static int longest_file; @@ -38,6 +38,8 @@ static int max_digits; #define DEBUG 0 #define PICKAXE_BLAME_MOVE 01 +#define PICKAXE_BLAME_COPY 02 +#define PICKAXE_BLAME_COPY_HARDER 04 /* bits #0..7 in revision.h, #8..11 used for merge_bases() in commit.c */ #define METAINFO_SHOWN (1u<<12) @@ -635,6 +637,78 @@ static int find_move_in_parent(struct scoreboard *sb, return 0; } +static int find_copy_in_parent(struct scoreboard *sb, + struct origin *target, + struct commit *parent, + struct origin *porigin, + int opt) +{ + struct diff_options diff_opts; + const char *paths[1]; + struct blame_entry *ent; + int i; + + if (find_last_in_target(sb, target) < 0) + return 1; /* nothing remains for this target */ + + diff_setup(&diff_opts); + diff_opts.recursive = 1; + diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT; + + /* Try "find copies harder" on new path */ + if ((opt & PICKAXE_BLAME_COPY_HARDER) && + (!porigin || strcmp(target->path, porigin->path))) { + diff_opts.detect_rename = DIFF_DETECT_COPY; + diff_opts.find_copies_harder = 1; + } + paths[0] = NULL; + diff_tree_setup_paths(paths, &diff_opts); + if (diff_setup_done(&diff_opts) < 0) + die("diff-setup"); + diff_tree_sha1(parent->tree->object.sha1, + target->commit->tree->object.sha1, + "", &diff_opts); + diffcore_std(&diff_opts); + + for (ent = sb->ent; ent; ent = ent->next) { + struct blame_entry split[3]; + if (ent->suspect != target || ent->guilty) + continue; + + memset(split, 0, sizeof(split)); + for (i = 0; i < diff_queued_diff.nr; i++) { + struct diff_filepair *p = diff_queued_diff.queue[i]; + struct origin *norigin; + mmfile_t file_p; + char type[10]; + char *blob; + struct blame_entry this[3]; + + if (!DIFF_FILE_VALID(p->one)) + continue; /* does not exist in parent */ + if (porigin && !strcmp(p->one->path, porigin->path)) + /* find_move already dealt with this path */ + continue; + norigin = find_origin(sb, parent, p->one->path); + + blob = read_sha1_file(norigin->blob_sha1, type, + (unsigned long *) &file_p.size); + file_p.ptr = blob; + if (!file_p.ptr) { + free(blob); + continue; + } + find_copy_in_blob(sb, ent, norigin, this, &file_p); + copy_split_if_better(split, this); + } + if (split[1].suspect) + split_blame(sb, split, ent); + } + diff_flush(&diff_opts); + + return 0; +} + #define MAXPARENT 16 static void pass_blame(struct scoreboard *sb, struct origin *origin, int opt) @@ -697,6 +771,18 @@ static void pass_blame(struct scoreboard *sb, struct origin *origin, int opt) return; } + /* + * Optionally run "ciff" to find copies from parents' files here. + */ + if (opt & PICKAXE_BLAME_COPY) + for (i = 0, parent = commit->parents; + i < MAXPARENT && parent; + parent = parent->next, i++) { + struct origin *porigin = parent_origin[i]; + if (find_copy_in_parent(sb, origin, parent->item, + porigin, opt)) + return; + } } static void assign_blame(struct scoreboard *sb, struct rev_info *revs, int opt) @@ -1099,6 +1185,11 @@ int cmd_pickaxe(int argc, const char **argv, const char *prefix) revs_file = argv[i]; else if (!strcmp("-M", arg)) opt |= PICKAXE_BLAME_MOVE; + else if (!strcmp("-C", arg)) { + if (opt & PICKAXE_BLAME_COPY) + opt |= PICKAXE_BLAME_COPY_HARDER; + opt |= PICKAXE_BLAME_COPY | PICKAXE_BLAME_MOVE; + } else if (!strcmp("-L", arg) && ++i < argc) { char *term; arg = argv[i]; |