If the -L option is used to specify a line range in git blame, and the
end of the range is past the end of the file, git will fail with a fatal
error. It may instead be desirable to perform a git blame for the line
numbers in the intersection of the file and the specified line range.
This patch adds a --fuzzy-lines command line option to allow this.
Signed-off-by: Isabella Stephens <istephens@xxxxxxxxxxxxx>
---
Documentation/blame-options.txt | 5 +++++
builtin/blame.c | 4 ++++
t/t8003-blame-corner-cases.sh | 6 ++++++
3 files changed, 15 insertions(+)
diff --git a/Documentation/blame-options.txt b/Documentation/blame-options.txt
index dc41957af..664cd8f8b 100644
--- a/Documentation/blame-options.txt
+++ b/Documentation/blame-options.txt
@@ -19,6 +19,11 @@
+
include::line-range-format.txt[]
+--fuzzy-lines::
+ Use fuzzy line ranges. If a range specified with -L starts on a line
+ within the file but ends past the end of the file, display the blame
+ for the existing lines rather than failing.
+
-l::
Show long rev (Default: off).
diff --git a/builtin/blame.c b/builtin/blame.c
index 67adaef4d..d25b39d40 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -661,6 +661,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
struct string_list range_list = STRING_LIST_INIT_NODUP;
int output_option = 0, opt = 0;
+ int fuzzy_lines = 0;
int show_stats = 0;
const char *revs_file = NULL;
const char *contents_from = NULL;
@@ -670,6 +671,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
OPT_BOOL(0, "root", &show_root, N_("Do not treat root commits as boundaries (Default: off)")),
OPT_BOOL(0, "show-stats", &show_stats, N_("Show work cost statistics")),
OPT_BOOL(0, "progress", &show_progress, N_("Force progress reporting")),
+ OPT_BOOL(0, "fuzzy-lines", &fuzzy_lines, N_("Use fuzzy line ranges")),
OPT_BIT(0, "score-debug", &output_option, N_("Show output score for blame entries"), OUTPUT_SHOW_SCORE),
OPT_BIT('f', "show-name", &output_option, N_("Show original filename (Default: auto)"), OUTPUT_SHOW_NAME),
OPT_BIT('n', "show-number", &output_option, N_("Show original linenumber (Default: off)"), OUTPUT_SHOW_NUMBER),
@@ -878,6 +880,8 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
nth_line_cb, &sb, lno, anchor,
&bottom, &top, sb.path))
usage(blame_usage);
+ if (fuzzy_lines && lno < top)
+ top = lno;
if (lno < top || ((lno || bottom) && lno < bottom))
die(Q_("file %s has only %lu line",
"file %s has only %lu lines",
diff --git a/t/t8003-blame-corner-cases.sh b/t/t8003-blame-corner-cases.sh
index 661f9d430..6e7657df2 100755
--- a/t/t8003-blame-corner-cases.sh
+++ b/t/t8003-blame-corner-cases.sh
@@ -220,6 +220,12 @@ test_expect_success 'blame -L with invalid end' '
test_i18ngrep "has only 2 lines" errors
'
+test_expect_success 'blame -L with invalid end and fuzzy-lines' '
+ git blame -L1,5 tres --fuzzy-lines >out &&
+ cat out &&
+ test $(wc -l < out) -eq 2
+'
+
test_expect_success 'blame parses <end> part of -L' '
git blame -L1,1 tres >out &&
cat out &&
--
2.14.1
