From: Stefan Beller <sbeller@google.com>
To: git@vger.kernel.org
Cc: gitster@pobox.com, rybak.a.v@gmail.com,
Stefan Beller <sbeller@google.com>
Subject: [PATCH 06/10] diff.c: add a blocks mode for moved code detection
Date: Wed, 18 Jul 2018 12:31:52 -0700 [thread overview]
Message-ID: <20180718193156.47365-7-sbeller@google.com> (raw)
In-Reply-To: <20180718193156.47365-1-sbeller@google.com>
The new "blocks" mode provides a middle ground between plain and zebra.
It is as intuitive (few colors) as plain, but still has the requirement
for a minimum of lines/characters to count a block as moved.
Suggested-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
(https://public-inbox.org/git/87o9j0uljo.fsf@evledraar.gmail.com/)
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
Documentation/diff-options.txt | 8 ++++--
diff.c | 6 +++--
diff.h | 5 ++--
t/t4015-diff-whitespace.sh | 49 ++++++++++++++++++++++++++++++++--
4 files changed, 60 insertions(+), 8 deletions(-)
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index e3a44f03cdc..ba56169de31 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -276,10 +276,14 @@ plain::
that are added somewhere else in the diff. This mode picks up any
moved line, but it is not very useful in a review to determine
if a block of code was moved without permutation.
-zebra::
+blocks::
Blocks of moved text of at least 20 alphanumeric characters
are detected greedily. The detected blocks are
- painted using either the 'color.diff.{old,new}Moved' color or
+ painted using either the 'color.diff.{old,new}Moved' color.
+ Adjacent blocks cannot be told apart.
+zebra::
+ Blocks of moved text are detected as in 'blocks' mode. The blocks
+ are painted using either the 'color.diff.{old,new}Moved' color or
'color.diff.{old,new}MovedAlternative'. The change between
the two colors indicates that a new block was detected.
dimmed_zebra::
diff --git a/diff.c b/diff.c
index d1bae900cdc..95c51c0b7df 100644
--- a/diff.c
+++ b/diff.c
@@ -271,6 +271,8 @@ static int parse_color_moved(const char *arg)
return COLOR_MOVED_NO;
else if (!strcmp(arg, "plain"))
return COLOR_MOVED_PLAIN;
+ else if (!strcmp(arg, "blocks"))
+ return COLOR_MOVED_BLOCKS;
else if (!strcmp(arg, "zebra"))
return COLOR_MOVED_ZEBRA;
else if (!strcmp(arg, "default"))
@@ -278,7 +280,7 @@ static int parse_color_moved(const char *arg)
else if (!strcmp(arg, "dimmed_zebra"))
return COLOR_MOVED_ZEBRA_DIM;
else
- return error(_("color moved setting must be one of 'no', 'default', 'zebra', 'dimmed_zebra', 'plain'"));
+ return error(_("color moved setting must be one of 'no', 'default', 'blocks', 'zebra', 'dimmed_zebra', 'plain'"));
}
int git_diff_ui_config(const char *var, const char *value, void *cb)
@@ -903,7 +905,7 @@ static void mark_color_as_moved(struct diff_options *o,
block_length++;
- if (flipped_block)
+ if (flipped_block && o->color_moved != COLOR_MOVED_BLOCKS)
l->flags |= DIFF_SYMBOL_MOVED_LINE_ALT;
}
adjust_last_block(o, n, block_length);
diff --git a/diff.h b/diff.h
index d29560f822c..7bd4f182c33 100644
--- a/diff.h
+++ b/diff.h
@@ -208,8 +208,9 @@ struct diff_options {
enum {
COLOR_MOVED_NO = 0,
COLOR_MOVED_PLAIN = 1,
- COLOR_MOVED_ZEBRA = 2,
- COLOR_MOVED_ZEBRA_DIM = 3,
+ COLOR_MOVED_BLOCKS = 2,
+ COLOR_MOVED_ZEBRA = 3,
+ COLOR_MOVED_ZEBRA_DIM = 4,
} color_moved;
#define COLOR_MOVED_DEFAULT COLOR_MOVED_ZEBRA
#define COLOR_MOVED_MIN_ALNUM_COUNT 20
diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
index ddbc3901385..e54529f026d 100755
--- a/t/t4015-diff-whitespace.sh
+++ b/t/t4015-diff-whitespace.sh
@@ -1223,7 +1223,7 @@ test_expect_success 'plain moved code, inside file' '
test_cmp expected actual
'
-test_expect_success 'detect permutations inside moved code -- dimmed_zebra' '
+test_expect_success 'detect blocks of moved code' '
git reset --hard &&
cat <<-\EOF >lines.txt &&
long line 1
@@ -1271,6 +1271,50 @@ test_expect_success 'detect permutations inside moved code -- dimmed_zebra' '
test_config color.diff.newMovedDimmed "normal cyan" &&
test_config color.diff.oldMovedAlternativeDimmed "normal blue" &&
test_config color.diff.newMovedAlternativeDimmed "normal yellow" &&
+ git diff HEAD --no-renames --color-moved=blocks --color >actual.raw &&
+ grep -v "index" actual.raw | test_decode_color >actual &&
+ cat <<-\EOF >expected &&
+ <BOLD>diff --git a/lines.txt b/lines.txt<RESET>
+ <BOLD>--- a/lines.txt<RESET>
+ <BOLD>+++ b/lines.txt<RESET>
+ <CYAN>@@ -1,16 +1,16 @@<RESET>
+ <MAGENTA>-long line 1<RESET>
+ <MAGENTA>-long line 2<RESET>
+ <MAGENTA>-long line 3<RESET>
+ line 4<RESET>
+ line 5<RESET>
+ line 6<RESET>
+ line 7<RESET>
+ line 8<RESET>
+ line 9<RESET>
+ <CYAN>+<RESET><CYAN>long line 1<RESET>
+ <CYAN>+<RESET><CYAN>long line 2<RESET>
+ <CYAN>+<RESET><CYAN>long line 3<RESET>
+ <CYAN>+<RESET><CYAN>long line 14<RESET>
+ <CYAN>+<RESET><CYAN>long line 15<RESET>
+ <CYAN>+<RESET><CYAN>long line 16<RESET>
+ line 10<RESET>
+ line 11<RESET>
+ line 12<RESET>
+ line 13<RESET>
+ <MAGENTA>-long line 14<RESET>
+ <MAGENTA>-long line 15<RESET>
+ <MAGENTA>-long line 16<RESET>
+ EOF
+ test_cmp expected actual
+
+'
+
+test_expect_success 'detect permutations inside moved code -- dimmed_zebra' '
+ # reuse setup from test before!
+ test_config color.diff.oldMoved "magenta" &&
+ test_config color.diff.newMoved "cyan" &&
+ test_config color.diff.oldMovedAlternative "blue" &&
+ test_config color.diff.newMovedAlternative "yellow" &&
+ test_config color.diff.oldMovedDimmed "normal magenta" &&
+ test_config color.diff.newMovedDimmed "normal cyan" &&
+ test_config color.diff.oldMovedAlternativeDimmed "normal blue" &&
+ test_config color.diff.newMovedAlternativeDimmed "normal yellow" &&
git diff HEAD --no-renames --color-moved=dimmed_zebra --color >actual.raw &&
grep -v "index" actual.raw | test_decode_color >actual &&
cat <<-\EOF >expected &&
@@ -1669,7 +1713,8 @@ test_expect_success '--color-moved treats adjacent blocks as separate for MIN_AL
7charsA
EOF
- git diff HEAD --color-moved=zebra --color --no-renames | grep -v "index" | test_decode_color >actual &&
+ git diff HEAD --color-moved=zebra --color --no-renames >actual.raw &&
+ grep -v "index" actual.raw | test_decode_color >actual &&
cat >expected <<-\EOF &&
<BOLD>diff --git a/bar b/bar<RESET>
<BOLD>--- a/bar<RESET>
--
2.18.0.233.g985f88cf7e-goog
next prev parent reply other threads:[~2018-07-18 19:32 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-18 19:31 [PATCHv6 00/10] Reroll of sb/diff-color-move-more Stefan Beller
2018-07-18 19:31 ` [PATCH 01/10] xdiff/xdiff.h: remove unused flags Stefan Beller
2018-07-18 19:31 ` [PATCH 02/10] xdiff/xdiffi.c: remove unneeded function declarations Stefan Beller
2018-07-18 19:31 ` [PATCH 03/10] t4015: avoid git as a pipe input Stefan Beller
2018-07-18 19:31 ` [PATCH 04/10] diff.c: do not pass diff options as keydata to hashmap Stefan Beller
2018-07-18 19:31 ` [PATCH 05/10] diff.c: adjust hash function signature to match hashmap expectation Stefan Beller
2018-07-18 19:31 ` Stefan Beller [this message]
2018-07-18 19:31 ` [PATCH 07/10] diff.c: decouple white space treatment from move detection algorithm Stefan Beller
2018-07-18 19:31 ` [PATCH 08/10] diff.c: factor advance_or_nullify out of mark_color_as_moved Stefan Beller
2018-07-18 19:31 ` [PATCH 09/10] diff.c: add white space mode to move detection that allows indent changes Stefan Beller
2018-07-18 19:31 ` [PATCH 10/10] diff.c: offer config option to control ws handling in move detection Stefan Beller
2018-07-19 19:05 ` [PATCHv6 00/10] Reroll of sb/diff-color-move-more Junio C Hamano
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