Prevent type exception on concatenation if diffstat returns None.
This will most often occur if diffstat is not installed in the
target platform, though may also happen in other cases where
diffstat fails to execute.
Signed-off-by: Sean Dague <sean@dague.net>
adding a
changeset: 0:8580ff50825a
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: a
% -f, directory
abort: can only follow copies/renames for explicit file names
% -f, but no args
changeset: 4:b30c444c7c84
tag: tip
user: test
date: Thu Jan 01 00:00:05 1970 +0000
summary: e
changeset: 3:16b60bf3f99a
user: test
date: Thu Jan 01 00:00:04 1970 +0000
summary: d
changeset: 2:21fba396af4c
user: test
date: Thu Jan 01 00:00:03 1970 +0000
summary: c
changeset: 1:c0296dabce9b
user: test
date: Thu Jan 01 00:00:02 1970 +0000
summary: b
changeset: 0:8580ff50825a
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: a
% one rename
changeset: 0:8580ff50825a
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files: a
description:
a
% many renames
changeset: 4:b30c444c7c84
tag: tip
user: test
date: Thu Jan 01 00:00:05 1970 +0000
files: dir/b e
description:
e
changeset: 2:21fba396af4c
user: test
date: Thu Jan 01 00:00:03 1970 +0000
files: b dir/b
description:
c
changeset: 1:c0296dabce9b
user: test
date: Thu Jan 01 00:00:02 1970 +0000
files: b
description:
b
changeset: 0:8580ff50825a
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files: a
description:
a
% log copies
4 e (dir/b)
3 b (a)
2 dir/b (b)
1 b (a)
0
% log copies, non-linear manifest
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
adding foo
5 e (dir/b)
% log -p d
changeset: 3:16b60bf3f99a
user: test
date: Thu Jan 01 00:00:04 1970 +0000
files: a b d
description:
d
diff -r 21fba396af4c -r 16b60bf3f99a d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/d Thu Jan 01 00:00:04 1970 +0000
@@ -0,0 +1,1 @@
+a
adding base
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
adding b1
% log -f
changeset: 3:e62f78d544b4
tag: tip
parent: 1:3d5bf5654eda
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b1
changeset: 1:3d5bf5654eda
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: r1
changeset: 0:67e992f2c4f3
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: base
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
adding b2
% log -f -r 1:tip
changeset: 1:3d5bf5654eda
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: r1
changeset: 2:60c670bf5b30
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: r2
changeset: 3:e62f78d544b4
parent: 1:3d5bf5654eda
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b1
2 files updated, 0 files merged, 1 files removed, 0 files unresolved
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
% log --follow-first
changeset: 6:2404bbcab562
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b1.1
changeset: 5:302e9dd6890d
parent: 3:e62f78d544b4
parent: 4:ddb82e70d1a1
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: m12
changeset: 3:e62f78d544b4
parent: 1:3d5bf5654eda
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b1
changeset: 1:3d5bf5654eda
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: r1
changeset: 0:67e992f2c4f3
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: base
% log -P 2
changeset: 6:2404bbcab562
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b1.1
changeset: 5:302e9dd6890d
parent: 3:e62f78d544b4
parent: 4:ddb82e70d1a1
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: m12
changeset: 4:ddb82e70d1a1
parent: 0:67e992f2c4f3
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b2
changeset: 3:e62f78d544b4
parent: 1:3d5bf5654eda
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b1
% log -r ""
abort: Ambiguous identifier!