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Diffstat (limited to 'builtin/blame.c')
-rw-r--r--builtin/blame.c99
1 files changed, 54 insertions, 45 deletions
diff --git a/builtin/blame.c b/builtin/blame.c
index fac0e93..a9705d0 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -88,6 +88,20 @@ struct origin {
char path[FLEX_ARRAY];
};
+static int diff_hunks(mmfile_t *file_a, mmfile_t *file_b, long ctxlen,
+ xdl_emit_hunk_consume_func_t hunk_func, void *cb_data)
+{
+ xpparam_t xpp = {0};
+ xdemitconf_t xecfg = {0};
+ xdemitcb_t ecb = {NULL};
+
+ xpp.flags = xdl_opts;
+ xecfg.ctxlen = ctxlen;
+ xecfg.hunk_func = hunk_func;
+ ecb.priv = cb_data;
+ return xdi_diff(file_a, file_b, &xpp, &xecfg, &ecb);
+}
+
/*
* Prepare diff_filespec and convert it using diff textconv API
* if the textconv driver exists.
@@ -760,12 +774,14 @@ struct blame_chunk_cb_data {
long tlno;
};
-static void blame_chunk_cb(void *data, long same, long p_next, long t_next)
+static int blame_chunk_cb(long start_a, long count_a,
+ long start_b, long count_b, void *data)
{
struct blame_chunk_cb_data *d = data;
- blame_chunk(d->sb, d->tlno, d->plno, same, d->target, d->parent);
- d->plno = p_next;
- d->tlno = t_next;
+ blame_chunk(d->sb, d->tlno, d->plno, start_b, d->target, d->parent);
+ d->plno = start_a + count_a;
+ d->tlno = start_b + count_b;
+ return 0;
}
/*
@@ -780,8 +796,7 @@ static int pass_blame_to_parent(struct scoreboard *sb,
int last_in_target;
mmfile_t file_p, file_o;
struct blame_chunk_cb_data d;
- xpparam_t xpp;
- xdemitconf_t xecfg;
+
memset(&d, 0, sizeof(d));
d.sb = sb; d.target = target; d.parent = parent;
last_in_target = find_last_in_target(sb, target);
@@ -792,11 +807,7 @@ static int pass_blame_to_parent(struct scoreboard *sb,
fill_origin_blob(&sb->revs->diffopt, target, &file_o);
num_get_patch++;
- memset(&xpp, 0, sizeof(xpp));
- xpp.flags = xdl_opts;
- memset(&xecfg, 0, sizeof(xecfg));
- xecfg.ctxlen = 0;
- xdi_diff_hunks(&file_p, &file_o, blame_chunk_cb, &d, &xpp, &xecfg);
+ diff_hunks(&file_p, &file_o, 0, blame_chunk_cb, &d);
/* The rest (i.e. anything after tlno) are the same as the parent */
blame_chunk(sb, d.tlno, d.plno, last_in_target, target, parent);
@@ -900,12 +911,15 @@ struct handle_split_cb_data {
long tlno;
};
-static void handle_split_cb(void *data, long same, long p_next, long t_next)
+static int handle_split_cb(long start_a, long count_a,
+ long start_b, long count_b, void *data)
{
struct handle_split_cb_data *d = data;
- handle_split(d->sb, d->ent, d->tlno, d->plno, same, d->parent, d->split);
- d->plno = p_next;
- d->tlno = t_next;
+ handle_split(d->sb, d->ent, d->tlno, d->plno, start_b, d->parent,
+ d->split);
+ d->plno = start_a + count_a;
+ d->tlno = start_b + count_b;
+ return 0;
}
/*
@@ -923,8 +937,7 @@ static void find_copy_in_blob(struct scoreboard *sb,
int cnt;
mmfile_t file_o;
struct handle_split_cb_data d;
- xpparam_t xpp;
- xdemitconf_t xecfg;
+
memset(&d, 0, sizeof(d));
d.sb = sb; d.ent = ent; d.parent = parent; d.split = split;
/*
@@ -944,12 +957,8 @@ static void find_copy_in_blob(struct scoreboard *sb,
* file_o is a part of final image we are annotating.
* file_p partially may match that image.
*/
- memset(&xpp, 0, sizeof(xpp));
- xpp.flags = xdl_opts;
- memset(&xecfg, 0, sizeof(xecfg));
- xecfg.ctxlen = 1;
memset(split, 0, sizeof(struct blame_entry [3]));
- xdi_diff_hunks(file_p, &file_o, handle_split_cb, &d, &xpp, &xecfg);
+ diff_hunks(file_p, &file_o, 1, handle_split_cb, &d);
/* remainder, if any, all match the preimage */
handle_split(sb, ent, d.tlno, d.plno, ent->num_lines, parent, split);
}
@@ -1829,16 +1838,14 @@ static int read_ancestry(const char *graft_file)
return 0;
}
-/*
- * How many columns do we need to show line numbers in decimal?
- */
-static int lineno_width(int lines)
+static int update_auto_abbrev(int auto_abbrev, struct origin *suspect)
{
- int i, width;
-
- for (width = 1, i = 10; i <= lines; width++)
- i *= 10;
- return width;
+ const char *uniq = find_unique_abbrev(suspect->commit->object.sha1,
+ auto_abbrev);
+ int len = strlen(uniq);
+ if (auto_abbrev < len)
+ return len;
+ return auto_abbrev;
}
/*
@@ -1851,12 +1858,16 @@ static void find_alignment(struct scoreboard *sb, int *option)
int longest_dst_lines = 0;
unsigned largest_score = 0;
struct blame_entry *e;
+ int compute_auto_abbrev = (abbrev < 0);
+ int auto_abbrev = default_abbrev;
for (e = sb->ent; e; e = e->next) {
struct origin *suspect = e->suspect;
struct commit_info ci;
int num;
+ if (compute_auto_abbrev)
+ auto_abbrev = update_auto_abbrev(auto_abbrev, suspect);
if (strcmp(suspect->path, sb->path))
*option |= OUTPUT_SHOW_NAME;
num = strlen(suspect->path);
@@ -1881,9 +1892,13 @@ static void find_alignment(struct scoreboard *sb, int *option)
if (largest_score < ent_score(sb, e))
largest_score = ent_score(sb, e);
}
- max_orig_digits = lineno_width(longest_src_lines);
- max_digits = lineno_width(longest_dst_lines);
- max_score_digits = lineno_width(largest_score);
+ max_orig_digits = decimal_width(longest_src_lines);
+ max_digits = decimal_width(longest_dst_lines);
+ max_score_digits = decimal_width(largest_score);
+
+ if (compute_auto_abbrev)
+ /* one more abbrev length is needed for the boundary commit */
+ abbrev = auto_abbrev + 1;
}
/*
@@ -2051,14 +2066,8 @@ static int git_blame_config(const char *var, const char *value, void *cb)
return 0;
}
- switch (userdiff_config(var, value)) {
- case 0:
- break;
- case -1:
+ if (userdiff_config(var, value) < 0)
return -1;
- default:
- return 0;
- }
return git_default_config(var, value, cb);
}
@@ -2321,6 +2330,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
OPT_BIT('s', NULL, &output_option, "Suppress author name and timestamp (Default: off)", OUTPUT_NO_AUTHOR),
OPT_BIT('e', "show-email", &output_option, "Show author email instead of name (Default: off)", OUTPUT_SHOW_EMAIL),
OPT_BIT('w', NULL, &xdl_opts, "Ignore whitespace differences", XDF_IGNORE_WHITESPACE),
+ OPT_BIT(0, "minimal", &xdl_opts, "Spend extra cycles to find better match", XDF_NEED_MINIMAL),
OPT_STRING('S', NULL, &revs_file, "file", "Use revisions from <file> instead of calling git-rev-list"),
OPT_STRING(0, "contents", &contents_from, "file", "Use <file>'s contents as the final image"),
{ OPTION_CALLBACK, 'C', NULL, &opt, "score", "Find line copies within and across files", PARSE_OPT_OPTARG, blame_copy_callback },
@@ -2362,10 +2372,9 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
parse_done:
argc = parse_options_end(&ctx);
- if (abbrev == -1)
- abbrev = default_abbrev;
- /* one more abbrev length is needed for the boundary commit */
- abbrev++;
+ if (0 < abbrev)
+ /* one more abbrev length is needed for the boundary commit */
+ abbrev++;
if (revs_file && read_ancestry(revs_file))
die_errno("reading graft file '%s' failed", revs_file);