t4013: add tests for --diff-merges=first-parent

This new option provides essential new functionality, changing diff
output to first parent only, without changing history traversal mode,
so it deserves its own test.

As we do it, add additional test that --diff-merges=first-parent by
itself doesn't imply -p and only outputs diffs for merge commits.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Sergey Organov 2020-12-21 18:20:00 +03:00 committed by Junio C Hamano
parent 1d24509b7b
commit af04d8f1a5
3 changed files with 195 additions and 0 deletions

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@ -327,6 +327,8 @@ log --no-diff-merges -p --first-parent master
log --diff-merges=off -p --first-parent master
log --first-parent --diff-merges=off -p master
log -p --first-parent master
log -p --diff-merges=first-parent master
log --diff-merges=first-parent master
log -m -p --first-parent master
log -m -p master
log --cc -m -p master

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@ -0,0 +1,56 @@
$ git log --diff-merges=first-parent master
commit 59d314ad6f356dd08601a4cd5e530381da3e3c64
Merge: 9a6d494 c7a2ab9
Author: A U Thor <author@example.com>
Date: Mon Jun 26 00:04:00 2006 +0000
Merge branch 'side'
diff --git a/dir/sub b/dir/sub
index cead32e..992913c 100644
--- a/dir/sub
+++ b/dir/sub
@@ -4,3 +4,5 @@ C
D
E
F
+1
+2
diff --git a/file0 b/file0
index b414108..10a8a9f 100644
--- a/file0
+++ b/file0
@@ -4,3 +4,6 @@
4
5
6
+A
+B
+C
commit c7a2ab9e8eac7b117442a607d5a9b3950ae34d5a
Author: A U Thor <author@example.com>
Date: Mon Jun 26 00:03:00 2006 +0000
Side
commit 9a6d4949b6b76956d9d5e26f2791ec2ceff5fdc0
Author: A U Thor <author@example.com>
Date: Mon Jun 26 00:02:00 2006 +0000
Third
commit 1bde4ae5f36c8d9abe3a0fce0c6aab3c4a12fe44
Author: A U Thor <author@example.com>
Date: Mon Jun 26 00:01:00 2006 +0000
Second
This is the second commit.
commit 444ac553ac7612cc88969031b02b3767fb8a353a
Author: A U Thor <author@example.com>
Date: Mon Jun 26 00:00:00 2006 +0000
Initial
$

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@ -0,0 +1,137 @@
$ git log -p --diff-merges=first-parent master
commit 59d314ad6f356dd08601a4cd5e530381da3e3c64
Merge: 9a6d494 c7a2ab9
Author: A U Thor <author@example.com>
Date: Mon Jun 26 00:04:00 2006 +0000
Merge branch 'side'
diff --git a/dir/sub b/dir/sub
index cead32e..992913c 100644
--- a/dir/sub
+++ b/dir/sub
@@ -4,3 +4,5 @@ C
D
E
F
+1
+2
diff --git a/file0 b/file0
index b414108..10a8a9f 100644
--- a/file0
+++ b/file0
@@ -4,3 +4,6 @@
4
5
6
+A
+B
+C
commit c7a2ab9e8eac7b117442a607d5a9b3950ae34d5a
Author: A U Thor <author@example.com>
Date: Mon Jun 26 00:03:00 2006 +0000
Side
diff --git a/dir/sub b/dir/sub
index 35d242b..7289e35 100644
--- a/dir/sub
+++ b/dir/sub
@@ -1,2 +1,4 @@
A
B
+1
+2
diff --git a/file0 b/file0
index 01e79c3..f4615da 100644
--- a/file0
+++ b/file0
@@ -1,3 +1,6 @@
1
2
3
+A
+B
+C
diff --git a/file3 b/file3
new file mode 100644
index 0000000..7289e35
--- /dev/null
+++ b/file3
@@ -0,0 +1,4 @@
+A
+B
+1
+2
commit 9a6d4949b6b76956d9d5e26f2791ec2ceff5fdc0
Author: A U Thor <author@example.com>
Date: Mon Jun 26 00:02:00 2006 +0000
Third
diff --git a/dir/sub b/dir/sub
index 8422d40..cead32e 100644
--- a/dir/sub
+++ b/dir/sub
@@ -2,3 +2,5 @@ A
B
C
D
+E
+F
diff --git a/file1 b/file1
new file mode 100644
index 0000000..b1e6722
--- /dev/null
+++ b/file1
@@ -0,0 +1,3 @@
+A
+B
+C
commit 1bde4ae5f36c8d9abe3a0fce0c6aab3c4a12fe44
Author: A U Thor <author@example.com>
Date: Mon Jun 26 00:01:00 2006 +0000
Second
This is the second commit.
diff --git a/dir/sub b/dir/sub
index 35d242b..8422d40 100644
--- a/dir/sub
+++ b/dir/sub
@@ -1,2 +1,4 @@
A
B
+C
+D
diff --git a/file0 b/file0
index 01e79c3..b414108 100644
--- a/file0
+++ b/file0
@@ -1,3 +1,6 @@
1
2
3
+4
+5
+6
diff --git a/file2 b/file2
deleted file mode 100644
index 01e79c3..0000000
--- a/file2
+++ /dev/null
@@ -1,3 +0,0 @@
-1
-2
-3
commit 444ac553ac7612cc88969031b02b3767fb8a353a
Author: A U Thor <author@example.com>
Date: Mon Jun 26 00:00:00 2006 +0000
Initial
$