From 36617af7ed594d1928554356d809bd611c642dd2 Mon Sep 17 00:00:00 2001 From: Antoine Pelisse Date: Wed, 19 Jun 2013 20:46:07 +0200 Subject: diff: add --ignore-blank-lines option The goal of the patch is to introduce the GNU diff -B/--ignore-blank-lines as closely as possible. The short option is not available because it's already used for "break-rewrites". When this option is used, git-diff will not create hunks that simply add or remove empty lines, but will still show empty lines addition/suppression if they are close enough to "valuable" changes. There are two differences between this option and GNU diff -B option: - GNU diff doesn't have "--inter-hunk-context", so this must be handled - The following sequence looks like a bug (context is displayed twice): $ seq 5 >file1 $ cat <file2 change 1 2 3 4 5 change EOF $ diff -u -B file1 file2 --- file1 2013-06-08 22:13:04.471517834 +0200 +++ file2 2013-06-08 22:13:23.275517855 +0200 @@ -1,5 +1,7 @@ +change 1 2 + 3 4 5 @@ -3,3 +5,4 @@ 3 4 5 +change So here is a more thorough description of the option: - real changes are interesting - blank lines that are close enough (less than context size) to interesting changes are considered interesting (recursive definition) - "context" lines are used around each hunk of interesting changes - If two hunks are separated by less than "inter-hunk-context", they will be merged into one. The implementation does the "interesting changes selection" in a single pass. Signed-off-by: Antoine Pelisse Signed-off-by: Junio C Hamano --- t/t4015-diff-whitespace.sh | 345 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 345 insertions(+) (limited to 't') diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh index cc3db1304e..3fb4b976a2 100755 --- a/t/t4015-diff-whitespace.sh +++ b/t/t4015-diff-whitespace.sh @@ -142,6 +142,351 @@ EOF git diff --ignore-space-at-eol > out test_expect_success 'another test, with --ignore-space-at-eol' 'test_cmp expect out' +test_expect_success 'ignore-blank-lines: only new lines' ' + test_seq 5 >x && + git update-index x && + test_seq 5 | sed "/3/i \\ +" >x && + git diff --ignore-blank-lines >out && + >expect && + test_cmp out expect +' + +test_expect_success 'ignore-blank-lines: only new lines with space' ' + test_seq 5 >x && + git update-index x && + test_seq 5 | sed "/3/i \ " >x && + git diff -w --ignore-blank-lines >out && + >expect && + test_cmp out expect +' + +test_expect_success 'ignore-blank-lines: after change' ' + cat <<-\EOF >x && + 1 + 2 + + 3 + 4 + 5 + + 6 + 7 + EOF + git update-index x && + cat <<-\EOF >x && + change + + 1 + 2 + 3 + 4 + 5 + 6 + + 7 + EOF + git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,6 +1,7 @@ + +change + + + 1 + 2 + - + 3 + 4 + 5 + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: before change' ' + cat <<-\EOF >x && + 1 + 2 + + 3 + 4 + 5 + 6 + 7 + EOF + git update-index x && + cat <<-\EOF >x && + + 1 + 2 + 3 + 4 + 5 + + 6 + 7 + change + EOF + git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -4,5 +4,7 @@ + 3 + 4 + 5 + + + 6 + 7 + +change + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: between changes' ' + cat <<-\EOF >x && + 1 + 2 + 3 + 4 + 5 + + + 6 + 7 + 8 + 9 + 10 + EOF + git update-index x && + cat <<-\EOF >x && + change + 1 + 2 + + 3 + 4 + 5 + 6 + 7 + 8 + + 9 + 10 + change + EOF + git diff --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,5 +1,7 @@ + +change + 1 + 2 + + + 3 + 4 + 5 + @@ -8,5 +8,7 @@ + 6 + 7 + 8 + + + 9 + 10 + +change + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: between changes (with interhunkctx)' ' + test_seq 10 >x && + git update-index x && + cat <<-\EOF >x && + change + 1 + 2 + + 3 + 4 + 5 + + 6 + 7 + 8 + 9 + + 10 + change + EOF + git diff --inter-hunk-context=2 --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,10 +1,15 @@ + +change + 1 + 2 + + + 3 + 4 + 5 + + + 6 + 7 + 8 + 9 + + + 10 + +change + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: scattered spaces' ' + test_seq 10 >x && + git update-index x && + cat <<-\EOF >x && + change + 1 + 2 + 3 + + 4 + + 5 + + 6 + + + 7 + + 8 + 9 + 10 + change + EOF + git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,3 +1,4 @@ + +change + 1 + 2 + 3 + @@ -8,3 +15,4 @@ + 8 + 9 + 10 + +change + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: spaces coalesce' ' + test_seq 6 >x && + git update-index x && + cat <<-\EOF >x && + change + 1 + 2 + 3 + + 4 + + 5 + + 6 + change + EOF + git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,6 +1,11 @@ + +change + 1 + 2 + 3 + + + 4 + + + 5 + + + 6 + +change + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: mix changes and blank lines' ' + test_seq 16 >x && + git update-index x && + cat <<-\EOF >x && + change + 1 + 2 + + 3 + 4 + 5 + change + 6 + 7 + 8 + + 9 + 10 + 11 + change + 12 + 13 + 14 + + 15 + 16 + change + EOF + git diff --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,8 +1,11 @@ + +change + 1 + 2 + + + 3 + 4 + 5 + +change + 6 + 7 + 8 + @@ -9,8 +13,11 @@ + 9 + 10 + 11 + +change + 12 + 13 + 14 + + + 15 + 16 + +change + EOF + compare_diff_patch expected out.tmp +' + test_expect_success 'check mixed spaces and tabs in indent' ' # This is indented with SP HT SP. -- cgit v1.3-6-g1900