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line-range: reject -L line numbers less than 1

Since inception, git-blame -L has been documented as accepting 1-based
line numbers. When handed a line number less than 1, -L's behavior is
undocumented and undefined; it's also nonsensical and should be
diagnosed as an error. Do so.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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commit 5ce922a014f78684a96c3d03a51decf0d21fa58d 1 parent 9527604
@sunshineco sunshineco authored gitster committed
Showing with 13 additions and 10 deletions.
  1. +4 −1 line-range.c
  2. +9 −9 t/annotate-tests.sh
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5 line-range.c
@@ -54,8 +54,11 @@ static const char *parse_loc(const char *spec, nth_line_fn_t nth_line,
}
num = strtol(spec, &term, 10);
if (term != spec) {
- if (ret)
+ if (ret) {
+ if (num <= 0)
+ die("-L invalid line number: %ld", num);
*ret = num;
+ }
return term;
}
View
18 t/annotate-tests.sh
@@ -185,15 +185,15 @@ test_expect_success 'blame -L Y,X (undocumented)' '
check_count -L6,3 B 1 B1 1 B2 1 D 1
'
-test_expect_failure 'blame -L -X' '
+test_expect_success 'blame -L -X' '
test_must_fail $PROG -L-1 file
'
-test_expect_failure 'blame -L 0' '
+test_expect_success 'blame -L 0' '
test_must_fail $PROG -L0 file
'
-test_expect_failure 'blame -L ,0' '
+test_expect_success 'blame -L ,0' '
test_must_fail $PROG -L,0 file
'
@@ -447,8 +447,8 @@ test_expect_success 'blame empty' '
check_count -h HEAD^^ -f incremental
'
-test_expect_success 'blame -L 0 empty (undocumented)' '
- check_count -h HEAD^^ -f incremental -L0
+test_expect_success 'blame -L 0 empty' '
+ test_must_fail $PROG -L0 incremental HEAD^^
'
test_expect_success 'blame -L 1 empty' '
@@ -463,8 +463,8 @@ test_expect_success 'blame half' '
check_count -h HEAD^ -f incremental I 1
'
-test_expect_success 'blame -L 0 half (undocumented)' '
- check_count -h HEAD^ -f incremental -L0 I 1
+test_expect_success 'blame -L 0 half' '
+ test_must_fail $PROG -L0 incremental HEAD^
'
test_expect_success 'blame -L 1 half' '
@@ -483,8 +483,8 @@ test_expect_success 'blame full' '
check_count -f incremental I 1
'
-test_expect_success 'blame -L 0 full (undocumented)' '
- check_count -f incremental -L0 I 1
+test_expect_success 'blame -L 0 full' '
+ test_must_fail $PROG -L0 incremental
'
test_expect_success 'blame -L 1 full' '
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