[PATCH v5 0/3] merge-recursive: option to disable renames

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Revision v5 of 3 in this series.

4 messages, 1 author, 2016-06-15 · open the first message on its own page

[PATCH v5 0/3] merge-recursive: option to disable renames

From: Felipe Gonçalves Assis <hidden>
Date: 2016-06-15 23:08:20

Add tests as suggested by Eric Sunshine. Also fixes an inconsitency in the last
part.

Since there were no tests for the --rename-threshold option, I added them in a
separate commit, which is useful in itself.

The other two commits contain the previous patches plus the relevant tests.

For the last part, I made --find-renames (without =<n>) reset the similarity
index to the default, just as in git-diff.

Felipe Gonçalves Assis (3):
  merge-recursive: test rename threshold option
  merge-recursive: option to disable renames
  merge-recursive: more consistent interface

 Documentation/merge-strategies.txt                 |  12 +-
 merge-recursive.c                                  |  14 +-
 merge-recursive.h                                  |   1 +
 ...s.sh => t3032-merge-recursive-space-options.sh} |   2 +-
 t/t3034-merge-recursive-rename-options.sh          | 200 +++++++++++++++++++++
 5 files changed, 225 insertions(+), 4 deletions(-)
 rename t/{t3032-merge-recursive-options.sh => t3032-merge-recursive-space-options.sh} (99%)
 create mode 100755 t/t3034-merge-recursive-rename-options.sh

-- 
2.7.1.342.gf5bb636

[PATCH v5 1/3] merge-recursive: test rename threshold option

From: Felipe Gonçalves Assis <hidden>
Date: 2016-06-15 23:08:20

Commit 10ae7526bebb505ddddba01f76ec97d5f7b5e0e5 introduced this feature,
but did not include any tests. This commit fixes this.

Signed-off-by: Felipe Gonçalves Assis <redacted>
---

This commit is independent of the proposed feature, so it might be of interest
even if the rest of the patch is rejected.

 t/t3034-merge-recursive-rename-threshold.sh | 146 ++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100755 t/t3034-merge-recursive-rename-threshold.sh

diff --git a/t/t3034-merge-recursive-rename-threshold.sh b/t/t3034-merge-recursive-rename-threshold.sh
new file mode 100755
index 0000000..f0b3f44
--- /dev/null
+++ b/t/t3034-merge-recursive-rename-threshold.sh

@@ -0,0 +1,146 @@
+#!/bin/sh
+
+test_description='merge-recursive rename threshold option
+
+Test rename detection by examining rename/delete conflicts.
+
+Similarity index:
+R100 a-old a-new
+R075 b-old b-new
+R050 c-old c-new
+R025 d-old d-new
+'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+	get_expected_stages () {
+		git checkout rename -- $1-new &&
+		git ls-files --stage $1-new > expected-stages-undetected-$1
+		sed "s/ 0	/ 2	/
+		" < expected-stages-undetected-$1 > expected-stages-detected-$1
+		git read-tree -u --reset HEAD
+	} &&
+
+	rename_detected () {
+		git ls-files --stage $1-old $1-new > stages-actual-$1 &&
+		test_cmp expected-stages-detected-$1 stages-actual-$1
+	} &&
+
+	rename_undetected () {
+		git ls-files --stage $1-old $1-new > stages-actual-$1 &&
+		test_cmp expected-stages-undetected-$1 stages-actual-$1
+	} &&
+
+	check_common () {
+		git ls-files --stage > stages-actual &&
+		test $(wc -l < stages-actual) -eq 4
+	} &&
+
+	check_find_renames_25 () {
+		check_common &&
+		rename_detected a &&
+		rename_detected b &&
+		rename_detected c &&
+		rename_detected d
+	} &&
+
+	check_find_renames_50 () {
+		check_common
+		rename_detected a &&
+		rename_detected b &&
+		rename_detected c &&
+		rename_undetected d
+	} &&
+
+	check_find_renames_75 () {
+		check_common
+		rename_detected a &&
+		rename_detected b &&
+		rename_undetected c &&
+		rename_undetected d
+	} &&
+
+	check_find_renames_100 () {
+		check_common
+		rename_detected a &&
+		rename_undetected b &&
+		rename_undetected c &&
+		rename_undetected d
+	} &&
+
+	check_no_renames () {
+		check_common
+		rename_undetected a &&
+		rename_undetected b &&
+		rename_undetected c &&
+		rename_undetected d
+	} &&
+
+	cat <<-\EOF > a-old &&
+	aa1
+	aa2
+	aa3
+	aa4
+	EOF
+	sed s/aa/bb/ < a-old > b-old &&
+	sed s/aa/cc/ < a-old > c-old &&
+	sed s/aa/dd/ < a-old > d-old &&
+	git add [a-d]-old &&
+	test_tick &&
+	git commit -m base &&
+	git rm [a-d]-old &&
+	test_tick &&
+	git commit -m delete &&
+	git checkout -b rename HEAD^ &&
+	cp a-old a-new &&
+	sed 1,1s/./x/ < b-old > b-new &&
+	sed 1,2s/./x/ < c-old > c-new &&
+	sed 1,3s/./x/ < d-old > d-new &&
+	git add [a-d]-new &&
+	git rm [a-d]-old &&
+	test_tick &&
+	git commit -m rename &&
+	get_expected_stages a &&
+	get_expected_stages b &&
+	get_expected_stages c &&
+	get_expected_stages d
+'
+
+test_expect_success 'the default similarity index is 50%' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive HEAD^ -- HEAD master &&
+	check_find_renames_50
+'
+
+test_expect_success 'low rename threshold' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive --rename-threshold=25 HEAD^ -- HEAD master &&
+	check_find_renames_25
+'
+
+test_expect_success 'high rename threshold' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive --rename-threshold=75 HEAD^ -- HEAD master &&
+	check_find_renames_75
+'
+
+test_expect_success 'exact renames only' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive --rename-threshold=100% HEAD^ -- HEAD master &&
+	check_find_renames_100
+'
+
+test_expect_success 'rename threshold is truncated' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive --rename-threshold=200% HEAD^ -- HEAD master &&
+	check_find_renames_100
+'
+
+test_expect_success 'last wins in --rename-threshold=<m> --rename-threshold=<n>' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive --rename-threshold=25 --rename-threshold=75 HEAD^ -- HEAD master &&
+	check_find_renames_75
+'
+
+test_done

-- 
2.7.1.342.gf5bb636

[PATCH v5 3/3] merge-recursive: more consistent interface

From: Felipe Gonçalves Assis <hidden>
Date: 2016-06-15 23:08:20

Add strategy option find-renames, following git-diff interface. This
makes the option rename-threshold redundant.

Signed-off-by: Felipe Gonçalves Assis <redacted>
---

Added tests and made --find-renames reset the similarity index to the default.

 Documentation/merge-strategies.txt        | 10 ++++---
 merge-recursive.c                         |  7 ++++-
 t/t3034-merge-recursive-rename-options.sh | 48 +++++++++++++++++++++++++++----
 3 files changed, 54 insertions(+), 11 deletions(-)

diff --git a/Documentation/merge-strategies.txt b/Documentation/merge-strategies.txt
index 1a5e197..2eb92b9 100644
--- a/Documentation/merge-strategies.txt
+++ b/Documentation/merge-strategies.txt

@@ -85,11 +85,13 @@ no-renames;;
 	Turn off rename detection.
 	See also linkgit:git-diff[1] `--no-renames`.
 
+find-renames[=<n>];;
+	Turn on rename detection, optionally setting the similarity
+	threshold.  This is the default.
+	See also linkgit:git-diff[1] `--find-renames`.
+
 rename-threshold=<n>;;
-	Controls the similarity threshold used for rename detection.
-	Re-enables rename detection if disabled by a preceding
-	`no-renames`.
-	See also linkgit:git-diff[1] `-M`.
+	Deprecated synonym for `find-renames=<n>`.
 
 subtree[=<path>];;
 	This option is a more advanced form of 'subtree' strategy, where

diff --git a/merge-recursive.c b/merge-recursive.c
index 6dd0a11..63b8ba8 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c

@@ -2094,7 +2094,12 @@ int parse_merge_opt(struct merge_options *o, const char *s)
 		o->renormalize = 0;
 	else if (!strcmp(s, "no-renames"))
 		o->detect_rename = 0;
-	else if (skip_prefix(s, "rename-threshold=", &arg)) {
+	else if (!strcmp(s, "find-renames")) {
+		o->detect_rename = 1;
+		o->rename_score = 0;
+	}
+	else if (skip_prefix(s, "find-renames=", &arg) ||
+	         skip_prefix(s, "rename-threshold=", &arg)) {
 		if ((o->rename_score = parse_rename_score(&arg)) == -1 || *arg != 0)
 			return -1;
 		o->detect_rename = 1;

diff --git a/t/t3034-merge-recursive-rename-options.sh b/t/t3034-merge-recursive-rename-options.sh
index 2f10fa7..4e3fefd 100755
--- a/t/t3034-merge-recursive-rename-options.sh
+++ b/t/t3034-merge-recursive-rename-options.sh

@@ -115,25 +115,25 @@ test_expect_success 'the default similarity index is 50%' '
 
 test_expect_success 'low rename threshold' '
 	git read-tree --reset -u HEAD &&
-	test_must_fail git merge-recursive --rename-threshold=25 HEAD^ -- HEAD master &&
+	test_must_fail git merge-recursive --find-renames=25 HEAD^ -- HEAD master &&
 	check_find_renames_25
 '
 
 test_expect_success 'high rename threshold' '
 	git read-tree --reset -u HEAD &&
-	test_must_fail git merge-recursive --rename-threshold=75 HEAD^ -- HEAD master &&
+	test_must_fail git merge-recursive --find-renames=75 HEAD^ -- HEAD master &&
 	check_find_renames_75
 '
 
 test_expect_success 'exact renames only' '
 	git read-tree --reset -u HEAD &&
-	test_must_fail git merge-recursive --rename-threshold=100% HEAD^ -- HEAD master &&
+	test_must_fail git merge-recursive --find-renames=100% HEAD^ -- HEAD master &&
 	check_find_renames_100
 '
 
 test_expect_success 'rename threshold is truncated' '
 	git read-tree --reset -u HEAD &&
-	test_must_fail git merge-recursive --rename-threshold=200% HEAD^ -- HEAD master &&
+	test_must_fail git merge-recursive --find-renames=200% HEAD^ -- HEAD master &&
 	check_find_renames_100
 '

@@ -143,12 +143,36 @@ test_expect_success 'disabled rename detection' '
 	check_no_renames
 '
 
-test_expect_success 'last wins in --rename-threshold=<m> --rename-threshold=<n>' '
+test_expect_success 'last wins in --find-renames=<m> --find-renames=<n>' '
 	git read-tree --reset -u HEAD &&
-	test_must_fail git merge-recursive --rename-threshold=25 --rename-threshold=75 HEAD^ -- HEAD master &&
+	test_must_fail git merge-recursive --find-renames=25 --find-renames=75 HEAD^ -- HEAD master &&
 	check_find_renames_75
 '
 
+test_expect_success '--find-renames is equivalent to --find-renames=5' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive --find-renames=25 --find-renames HEAD^ -- HEAD master &&
+	check_find_renames_50
+'
+
+test_expect_success 'last wins in --no-renames --find-renames' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive --no-renames --find-renames HEAD^ -- HEAD master &&
+	check_find_renames_50
+'
+
+test_expect_success 'last wins in --find-renames --no-renames' '
+	git read-tree --reset -u HEAD &&
+	git merge-recursive --find-renames --no-renames HEAD^ -- HEAD master &&
+	check_no_renames
+'
+
+test_expect_success 'rename-threshold=<n> is a synonym for find-renames=<n>' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive --rename-threshold=25 HEAD^ -- HEAD master &&
+	check_find_renames_25
+'
+
 test_expect_success 'last wins in --no-renames --rename-threshold=<n>' '
 	git read-tree --reset -u HEAD &&
 	test_must_fail git merge-recursive --no-renames --rename-threshold=25 HEAD^ -- HEAD master &&

@@ -161,4 +185,16 @@ test_expect_success 'last wins in --rename-threshold=<n> --no-renames' '
 	check_no_renames
 '
 
+test_expect_success 'last wins in --rename-threshold=<n> --find-renames' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive --rename-threshold=25 --find-renames HEAD^ -- HEAD master &&
+	check_find_renames_50
+'
+
+test_expect_success 'last wins in --find-renames --rename-threshold=<n>' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive --find-renames --rename-threshold=25 HEAD^ -- HEAD master &&
+	check_find_renames_25
+'
+
 test_done

-- 
2.7.1.342.gf5bb636

[PATCH v5 2/3] merge-recursive: option to disable renames

From: Felipe Gonçalves Assis <hidden>
Date: 2016-06-15 23:08:20

The recursive strategy turns on rename detection by default. Add a
strategy option to disable rename detection even for exact renames.

Signed-off-by: Felipe Gonçalves Assis <redacted>
---

Added tests.

For consistent naming, I renamed and slightly edited the test of whitespace
options:
t/t3032-merge-recursive-options.sh -> t/t3032-merge-recursive-space-options.sh

 Documentation/merge-strategies.txt                   |  6 ++++++
 merge-recursive.c                                    |  7 +++++++
 merge-recursive.h                                    |  1 +
 ...ons.sh => t3032-merge-recursive-space-options.sh} |  2 +-
 ...ld.sh => t3034-merge-recursive-rename-options.sh} | 20 +++++++++++++++++++-
 5 files changed, 34 insertions(+), 2 deletions(-)
 rename t/{t3032-merge-recursive-options.sh => t3032-merge-recursive-space-options.sh} (99%)
 rename t/{t3034-merge-recursive-rename-threshold.sh => t3034-merge-recursive-rename-options.sh} (83%)

diff --git a/Documentation/merge-strategies.txt b/Documentation/merge-strategies.txt
index 7bbd19b..1a5e197 100644
--- a/Documentation/merge-strategies.txt
+++ b/Documentation/merge-strategies.txt

@@ -81,8 +81,14 @@ no-renormalize;;
 	Disables the `renormalize` option.  This overrides the
 	`merge.renormalize` configuration variable.
 
+no-renames;;
+	Turn off rename detection.
+	See also linkgit:git-diff[1] `--no-renames`.
+
 rename-threshold=<n>;;
 	Controls the similarity threshold used for rename detection.
+	Re-enables rename detection if disabled by a preceding
+	`no-renames`.
 	See also linkgit:git-diff[1] `-M`.
 
 subtree[=<path>];;

diff --git a/merge-recursive.c b/merge-recursive.c
index 8eabde2..6dd0a11 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c

@@ -482,6 +482,9 @@ static struct string_list *get_renames(struct merge_options *o,
 	struct diff_options opts;
 
 	renames = xcalloc(1, sizeof(struct string_list));
+	if (!o->detect_rename)
+		return renames;
+
 	diff_setup(&opts);
 	DIFF_OPT_SET(&opts, RECURSIVE);
 	DIFF_OPT_CLR(&opts, RENAME_EMPTY);

@@ -2039,6 +2042,7 @@ void init_merge_options(struct merge_options *o)
 	o->diff_rename_limit = -1;
 	o->merge_rename_limit = -1;
 	o->renormalize = 0;
+	o->detect_rename = 1;
 	merge_recursive_config(o);
 	if (getenv("GIT_MERGE_VERBOSITY"))
 		o->verbosity =

@@ -2088,9 +2092,12 @@ int parse_merge_opt(struct merge_options *o, const char *s)
 		o->renormalize = 1;
 	else if (!strcmp(s, "no-renormalize"))
 		o->renormalize = 0;
+	else if (!strcmp(s, "no-renames"))
+		o->detect_rename = 0;
 	else if (skip_prefix(s, "rename-threshold=", &arg)) {
 		if ((o->rename_score = parse_rename_score(&arg)) == -1 || *arg != 0)
 			return -1;
+		o->detect_rename = 1;
 	}
 	else
 		return -1;

diff --git a/merge-recursive.h b/merge-recursive.h
index 9e090a3..52f0201 100644
--- a/merge-recursive.h
+++ b/merge-recursive.h

@@ -17,6 +17,7 @@ struct merge_options {
 	unsigned renormalize : 1;
 	long xdl_opts;
 	int verbosity;
+	int detect_rename;
 	int diff_rename_limit;
 	int merge_rename_limit;
 	int rename_score;

diff --git a/t/t3032-merge-recursive-options.sh b/t/t3032-merge-recursive-space-options.sh
similarity index 99%
rename from t/t3032-merge-recursive-options.sh
rename to t/t3032-merge-recursive-space-options.sh
index 4029c9c..b56180e 100755
--- a/t/t3032-merge-recursive-options.sh
+++ b/t/t3032-merge-recursive-space-options.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-test_description='merge-recursive options
+test_description='merge-recursive space options
 
 * [master] Clarify
  ! [remote] Remove cruft

diff --git a/t/t3034-merge-recursive-rename-threshold.sh b/t/t3034-merge-recursive-rename-options.sh
similarity index 83%
rename from t/t3034-merge-recursive-rename-threshold.sh
rename to t/t3034-merge-recursive-rename-options.sh
index f0b3f44..2f10fa7 100755
--- a/t/t3034-merge-recursive-rename-threshold.sh
+++ b/t/t3034-merge-recursive-rename-options.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-test_description='merge-recursive rename threshold option
+test_description='merge-recursive rename options
 
 Test rename detection by examining rename/delete conflicts.

@@ -137,10 +137,28 @@ test_expect_success 'rename threshold is truncated' '
 	check_find_renames_100
 '
 
+test_expect_success 'disabled rename detection' '
+	git read-tree --reset -u HEAD &&
+	git merge-recursive --no-renames HEAD^ -- HEAD master &&
+	check_no_renames
+'
+
 test_expect_success 'last wins in --rename-threshold=<m> --rename-threshold=<n>' '
 	git read-tree --reset -u HEAD &&
 	test_must_fail git merge-recursive --rename-threshold=25 --rename-threshold=75 HEAD^ -- HEAD master &&
 	check_find_renames_75
 '
 
+test_expect_success 'last wins in --no-renames --rename-threshold=<n>' '
+	git read-tree --reset -u HEAD &&
+	test_must_fail git merge-recursive --no-renames --rename-threshold=25 HEAD^ -- HEAD master &&
+	check_find_renames_25
+'
+
+test_expect_success 'last wins in --rename-threshold=<n> --no-renames' '
+	git read-tree --reset -u HEAD &&
+	git merge-recursive --rename-threshold=25 --no-renames HEAD^ -- HEAD master &&
+	check_no_renames
+'
+
 test_done

-- 
2.7.1.342.gf5bb636

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