Re: [PATCH] diff: correct newline in summary for renamed files

[Jeff King <peff@peff.net>]

On Wed, Sep 27, 2017 at 06:09:25PM -0400, Jeff King wrote:

> > diff --git a/t/t4016-diff-quote.sh b/t/t4016-diff-quote.sh
> > index 9c48e5c2c9..514056dd10 100755
> > --- a/t/t4016-diff-quote.sh
> > +++ b/t/t4016-diff-quote.sh
> > @@ -30,6 +30,7 @@ test_expect_success setup '
> >  	git add . &&
> >  	git commit -m initial &&
> >  	git mv "$P0.0" "R$P0.0" &&
> > +	chmod a+x "R$P0.0" &&
> >  	git mv "$P0.1" "R$P1.0" &&
> >  	git mv "$P0.2" "R$P2.0" &&
> >  	git mv "$P0.3" "R$P3.0" &&
> 
> Won't this chmod be a problem for platforms without an executable bit?
> I think you'd need to use "update-index --chmod=+x" here, or require the
> FILEMODE prereq.
> 
> The whole script is marked as !MINGW, so that makes it less of a
> problem, but it's still possible have !FILEMODE on a Linux system, if
> you're on a funny filesystem. That also seems like a good reason to make
> sure this is in a script which is run more widely, since Windows folks
> would want to run this test, too.

The most appropriate place seems like t4013. I tried adding to its big
list of tested formats, but it's quite fragile. The patch below is what
I came up with, but it still needs updated to cover the cases which call
"log --all".

I think we'd do better to just do a set of new tests at the end (or even
a new test script for diffing mode changes in various formats).

-- >8 --
diff --git a/t/t4013-diff-various.sh b/t/t4013-diff-various.sh
index d09acfe48e..c515e3e53f 100755
--- a/t/t4013-diff-various.sh
+++ b/t/t4013-diff-various.sh
@@ -90,6 +90,14 @@ test_expect_success setup '
 	git commit -m "Rearranged lines in dir/sub" &&
 	git checkout master &&
 
+	GIT_AUTHOR_DATE="2006-06-26 00:06:00 +0000" &&
+	GIT_COMMITTER_DATE="2006-06-26 00:06:00 +0000" &&
+	export GIT_AUTHOR_DATE GIT_COMMITTER_DATE &&
+	git checkout -b mode initial &&
+	git update-index --chmod=+x file0 &&
+	git commit -m "update mode" &&
+	git checkout -f master &&
+
 	git config diff.renames false &&
 
 	git show-branch
@@ -192,6 +200,10 @@ diff-tree --pretty side
 diff-tree --pretty -p side
 diff-tree --pretty --patch-with-stat side
 
+diff-tree initial mode
+diff-tree --stat initial mode
+diff-tree --summary initial mode
+
 diff-tree master
 diff-tree -p master
 diff-tree -p -m master
diff --git a/t/t4013/diff.diff-tree_--stat_initial_mode b/t/t4013/diff.diff-tree_--stat_initial_mode
new file mode 100644
index 0000000000..0e5943c2c6
--- /dev/null
+++ b/t/t4013/diff.diff-tree_--stat_initial_mode
@@ -0,0 +1,4 @@
+$ git diff-tree --stat initial mode
+ file0 | 0
+ 1 file changed, 0 insertions(+), 0 deletions(-)
+$
diff --git a/t/t4013/diff.diff-tree_--summary_initial_mode b/t/t4013/diff.diff-tree_--summary_initial_mode
new file mode 100644
index 0000000000..25846b6af8
--- /dev/null
+++ b/t/t4013/diff.diff-tree_--summary_initial_mode
@@ -0,0 +1,3 @@
+$ git diff-tree --summary initial mode
+ mode change 100644 => 100755 file0
+$
diff --git a/t/t4013/diff.diff-tree_initial_mode b/t/t4013/diff.diff-tree_initial_mode
new file mode 100644
index 0000000000..c47c09423e
--- /dev/null
+++ b/t/t4013/diff.diff-tree_initial_mode
@@ -0,0 +1,3 @@
+$ git diff-tree initial mode
+:100644 100755 01e79c32a8c99c557f0757da7cb6d65b3414466d 01e79c32a8c99c557f0757da7cb6d65b3414466d M	file0
+$