git-commit-vandalism/t/t4013/diff.log_-p_--first-parent_master
Jeff King 9ab89a2439 log: enable "-m" automatically with "--first-parent"
When using "--first-parent" to consider history as a single line of
commits, git-log still defaults to treating merges specially, even
though they could be considered as single commits in the linearized
history (that just introduce all of the changes from the second and
higher parents).

Let's instead have "--first-parent" imply "-m", which makes something
like:

  git log --first-parent -p

do what you'd expect. Likewise:

  git log --first-parent -Sfoo

will find "foo" in merge commits.

No new test is needed; we'll tweak the output of the existing
"--first-parent -p" test, which now matches the "-m --first-parent -p"
test. The unchanged existing test for "--no-diff-merges" confirms that
the user can get the old behavior if they want.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-29 13:43:57 -07:00

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$ git log -p --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' into master
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 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
$