From 96cfa94e68cfbe9942e230ae18b35eaf1ca30f99 Mon Sep 17 00:00:00 2001 From: Isabella Stephens Date: Fri, 15 Jun 2018 16:29:27 +1000 Subject: [PATCH 1/2] blame: prevent error if range ends past end of file 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. This commit prevents such behavior - instead we display the blame for existing lines within the specified range. Tests are amended accordingly. This commit also fixes two corner cases. Blaming -L n,-(n+1) now blames the first n lines of a file rather than from n to the end of the file. Blaming -L ,-n will be treated as -L 1,-n and blame the first line of the file, rather than blaming the whole file. Signed-off-by: Isabella Stephens Signed-off-by: Junio C Hamano --- builtin/blame.c | 4 ++-- line-range.c | 2 +- t/annotate-tests.sh | 4 ++-- t/t8003-blame-corner-cases.sh | 12 ++++++++---- 4 files changed, 13 insertions(+), 9 deletions(-) diff --git a/builtin/blame.c b/builtin/blame.c index 9dcb367b90..e1359b1927 100644 --- a/builtin/blame.c +++ b/builtin/blame.c @@ -886,13 +886,13 @@ parse_done: nth_line_cb, &sb, lno, anchor, &bottom, &top, sb.path)) usage(blame_usage); - if (lno < top || ((lno || bottom) && lno < bottom)) + if ((!lno && (top || bottom)) || lno < bottom) die(Q_("file %s has only %lu line", "file %s has only %lu lines", lno), path, lno); if (bottom < 1) bottom = 1; - if (top < 1) + if (top < 1 || lno < top) top = lno; bottom--; range_set_append_unsafe(&ranges, bottom, top); diff --git a/line-range.c b/line-range.c index 323399d16c..232c3909ec 100644 --- a/line-range.c +++ b/line-range.c @@ -47,7 +47,7 @@ static const char *parse_loc(const char *spec, nth_line_fn_t nth_line, else if (!num) *ret = begin; else - *ret = begin + num; + *ret = begin + num > 0 ? begin + num : 1; return term; } return spec; diff --git a/t/annotate-tests.sh b/t/annotate-tests.sh index 093832fef1..6da48a2e0a 100644 --- a/t/annotate-tests.sh +++ b/t/annotate-tests.sh @@ -320,11 +320,11 @@ test_expect_success 'blame -L ,Y (Y == nlines)' ' test_expect_success 'blame -L ,Y (Y == nlines + 1)' ' n=$(expr $(wc -l nlines)' ' - test_must_fail $PROG -L,12345 file + check_count -L,12345 A 1 B 1 B1 1 B2 1 "A U Thor" 1 C 1 D 1 E 1 ' test_expect_success 'blame -L multiple (disjoint)' ' diff --git a/t/t8003-blame-corner-cases.sh b/t/t8003-blame-corner-cases.sh index 661f9d430d..c92a47b6d5 100755 --- a/t/t8003-blame-corner-cases.sh +++ b/t/t8003-blame-corner-cases.sh @@ -216,14 +216,18 @@ test_expect_success 'blame -L with invalid start' ' ' test_expect_success 'blame -L with invalid end' ' - test_must_fail git blame -L1,5 tres 2>errors && - test_i18ngrep "has only 2 lines" errors + git blame -L1,5 tres >out && + test_line_count = 2 out ' test_expect_success 'blame parses part of -L' ' git blame -L1,1 tres >out && - cat out && - test $(wc -l < out) -eq 1 + test_line_count = 1 out +' + +test_expect_success 'blame -Ln,-(n+1)' ' + git blame -L3,-4 nine_lines >out && + test_line_count = 3 out ' test_expect_success 'indent of line numbers, nine lines' ' From 7f81c00f3b1bd45c2954b18550b8e351651f72f3 Mon Sep 17 00:00:00 2001 From: Isabella Stephens Date: Fri, 15 Jun 2018 16:29:28 +1000 Subject: [PATCH 2/2] log: prevent error if line range ends past end of file If the -L option is used to specify a line range in git log, and the end of the range is past the end of the file, git will fail with a fatal error. This commit prevents such behaviour - instead we perform the log for existing lines within the specified range. This commit also fixes a corner case where -L ,-n:file would be treated as a log over the whole file. Now we treat this as -L 1,-n:file and blame the first line of the file instead. Signed-off-by: Isabella Stephens Signed-off-by: Junio C Hamano --- line-log.c | 4 ++-- t/t4211-line-log.sh | 5 ++--- 2 files changed, 4 insertions(+), 5 deletions(-) diff --git a/line-log.c b/line-log.c index cdc2257db5..8ad074e58d 100644 --- a/line-log.c +++ b/line-log.c @@ -599,11 +599,11 @@ parse_lines(struct commit *commit, const char *prefix, struct string_list *args) lines, anchor, &begin, &end, full_name)) die("malformed -L argument '%s'", range_part); - if (lines < end || ((lines || begin) && lines < begin)) + if ((!lines && (begin || end)) || lines < begin) die("file %s has only %lu lines", name_part, lines); if (begin < 1) begin = 1; - if (end < 1) + if (end < 1 || lines < end) end = lines; begin--; line_log_data_insert(&ranges, full_name, begin, end); diff --git a/t/t4211-line-log.sh b/t/t4211-line-log.sh index d0377fae5c..436b13ad21 100755 --- a/t/t4211-line-log.sh +++ b/t/t4211-line-log.sh @@ -60,7 +60,6 @@ test_bad_opts "-L 1:nonexistent" "There is no path" test_bad_opts "-L 1:simple" "There is no path" test_bad_opts "-L '/foo:b.c'" "argument not .start,end:file" test_bad_opts "-L 1000:b.c" "has only.*lines" -test_bad_opts "-L 1,1000:b.c" "has only.*lines" test_bad_opts "-L :b.c" "argument not .start,end:file" test_bad_opts "-L :foo:b.c" "no match" @@ -86,12 +85,12 @@ test_expect_success '-L ,Y (Y == nlines)' ' test_expect_success '-L ,Y (Y == nlines + 1)' ' n=$(expr $(wc -l