#include "mailmap.h"
static char blame_usage[] =
-"git-blame [-c] [-b] [-l] [--root] [-x] [-t] [-f] [-n] [-s] [-p] [-L n,m] [-S <revs-file>] [-M] [-C] [-C] [--contents <filename>] [--incremental] [commit] [--] file\n"
+"git-blame [-c] [-b] [-l] [--root] [-t] [-f] [-n] [-s] [-p] [-w] [-L n,m] [-S <revs-file>] [-M] [-C] [-C] [--contents <filename>] [--incremental] [commit] [--] file\n"
" -c Use the same output mode as git-annotate (Default: off)\n"
" -b Show blank SHA-1 for boundary commits (Default: off)\n"
" -l Show long commit SHA1 (Default: off)\n"
" --root Do not treat root commits as boundaries (Default: off)\n"
" -t Show raw timestamp (Default: off)\n"
-" -x Do not use .mailmap file\n"
" -f, --show-name Show original filename (Default: auto)\n"
" -n, --show-number Show original linenumber (Default: off)\n"
" -s Suppress author name and timestamp (Default: off)\n"
" -p, --porcelain Show in a format designed for machine consumption\n"
+" -w Ignore whitespace differences\n"
" -L n,m Process only line range n,m, counting from 1\n"
" -M, -C Find line movements within and across files\n"
" --incremental Show blame entries as we find them, incrementally\n"
static int blank_boundary;
static int incremental;
static int cmd_is_annotate;
-static int no_mailmap;
+static int xdl_opts = XDF_NEED_MINIMAL;
static struct path_list mailmap;
#ifndef DEBUG
#define PICKAXE_BLAME_MOVE 01
#define PICKAXE_BLAME_COPY 02
#define PICKAXE_BLAME_COPY_HARDER 04
+#define PICKAXE_BLAME_COPY_HARDEST 010
/*
* blame for a blame_entry with score lower than these thresholds
num_read_blob++;
file->ptr = read_sha1_file(o->blob_sha1, &type,
(unsigned long *)(&(file->size)));
+ if (!file->ptr)
+ die("Cannot read blob %s for path %s",
+ sha1_to_hex(o->blob_sha1),
+ o->path);
o->file = *file;
}
else
xdemitconf_t xecfg;
xdemitcb_t ecb;
- xpp.flags = XDF_NEED_MINIMAL;
+ xpp.flags = xdl_opts;
+ memset(&xecfg, 0, sizeof(xecfg));
xecfg.ctxlen = context;
- xecfg.flags = 0;
ecb.outf = xdiff_outf;
ecb.priv = &state;
memset(&state, 0, sizeof(state));
memcpy(best_so_far, this, sizeof(struct blame_entry [3]));
}
+/*
+ * We are looking at a part of the final image represented by
+ * ent (tlno and same are offset by ent->s_lno).
+ * tlno is where we are looking at in the final image.
+ * up to (but not including) same match preimage.
+ * plno is where we are looking at in the preimage.
+ *
+ * <-------------- final image ---------------------->
+ * <------ent------>
+ * ^tlno ^same
+ * <---------preimage----->
+ * ^plno
+ *
+ * All line numbers are 0-based.
+ */
+static void handle_split(struct scoreboard *sb,
+ struct blame_entry *ent,
+ int tlno, int plno, int same,
+ struct origin *parent,
+ struct blame_entry *split)
+{
+ if (ent->num_lines <= tlno)
+ return;
+ if (tlno < same) {
+ struct blame_entry this[3];
+ tlno += ent->s_lno;
+ same += ent->s_lno;
+ split_overlap(this, ent, tlno, plno, same, parent);
+ copy_split_if_better(sb, split, this);
+ decref_split(this);
+ }
+}
+
/*
* Find the lines from parent that are the same as ent so that
* we can pass blames to it. file_p has the blob contents for
patch = compare_buffer(file_p, &file_o, 1);
+ /*
+ * file_o is a part of final image we are annotating.
+ * file_p partially may match that image.
+ */
memset(split, 0, sizeof(struct blame_entry [3]));
plno = tlno = 0;
for (i = 0; i < patch->num; i++) {
struct chunk *chunk = &patch->chunks[i];
- /* tlno to chunk->same are the same as ent */
- if (ent->num_lines <= tlno)
- break;
- if (tlno < chunk->same) {
- struct blame_entry this[3];
- split_overlap(this, ent,
- tlno + ent->s_lno, plno,
- chunk->same + ent->s_lno,
- parent);
- copy_split_if_better(sb, split, this);
- decref_split(this);
- }
+ handle_split(sb, ent, tlno, plno, chunk->same, parent, split);
plno = chunk->p_next;
tlno = chunk->t_next;
}
+ /* remainder, if any, all match the preimage */
+ handle_split(sb, ent, tlno, plno, ent->num_lines, parent, split);
free_patch(patch);
}
* and this code needs to be after diff_setup_done(), which
* usually makes find-copies-harder imply copy detection.
*/
- if ((opt & PICKAXE_BLAME_COPY_HARDER) &&
- (!porigin || strcmp(target->path, porigin->path)))
+ if ((opt & PICKAXE_BLAME_COPY_HARDEST)
+ || ((opt & PICKAXE_BLAME_COPY_HARDER)
+ && (!porigin || strcmp(target->path, porigin->path))))
diff_opts.find_copies_harder = 1;
if (is_null_sha1(target->commit->object.sha1))
unsigned long size;
commit->buffer =
read_sha1_file(commit->object.sha1, &type, &size);
+ if (!commit->buffer)
+ die("Cannot read commit %s",
+ sha1_to_hex(commit->object.sha1));
}
ret->author = author_buf;
get_ac_line(commit->buffer, "\nauthor ",
printf("boundary\n");
}
write_filename_info(suspect->path);
+ maybe_flush_or_die(stdout, "stdout");
}
}
*/
static int lineno_width(int lines)
{
- int i, width;
+ int i, width;
- for (width = 1, i = 10; i <= lines + 1; width++)
- i *= 10;
- return width;
+ for (width = 1, i = 10; i <= lines + 1; width++)
+ i *= 10;
+ return width;
}
/*
output_option |= OUTPUT_LONG_OBJECT_NAME;
else if (!strcmp("-s", arg))
output_option |= OUTPUT_NO_AUTHOR;
+ else if (!strcmp("-w", arg))
+ xdl_opts |= XDF_IGNORE_WHITESPACE;
else if (!strcmp("-S", arg) && ++i < argc)
revs_file = argv[i];
else if (!prefixcmp(arg, "-M")) {
blame_move_score = parse_score(arg+2);
}
else if (!prefixcmp(arg, "-C")) {
+ /*
+ * -C enables copy from removed files;
+ * -C -C enables copy from existing files, but only
+ * when blaming a new file;
+ * -C -C -C enables copy from existing files for
+ * everybody
+ */
+ if (opt & PICKAXE_BLAME_COPY_HARDER)
+ opt |= PICKAXE_BLAME_COPY_HARDEST;
if (opt & PICKAXE_BLAME_COPY)
opt |= PICKAXE_BLAME_COPY_HARDER;
opt |= PICKAXE_BLAME_COPY | PICKAXE_BLAME_MOVE;
else if (!strcmp("-p", arg) ||
!strcmp("--porcelain", arg))
output_option |= OUTPUT_PORCELAIN;
- else if (!strcmp("-x", arg) ||
- !strcmp("--no-mailmap", arg))
- no_mailmap = 1;
else if (!strcmp("--", arg)) {
seen_dashdash = 1;
i++;
sb.final_buf = read_sha1_file(o->blob_sha1, &type,
&sb.final_buf_size);
+ if (!sb.final_buf)
+ die("Cannot read blob %s for path %s",
+ sha1_to_hex(o->blob_sha1),
+ path);
}
num_read_blob++;
lno = prepare_lines(&sb);
die("reading graft file %s failed: %s",
revs_file, strerror(errno));
- if (!no_mailmap)
- read_mailmap(&mailmap, ".mailmap", NULL);
+ read_mailmap(&mailmap, ".mailmap", NULL);
assign_blame(&sb, &revs, opt);