git/t/t4205-log-pretty-formats.sh
Linus Torvalds 74faaa16f0 Fix "git diff --stat" for interesting - but empty - file changes
The behavior of "git diff --stat" is rather odd for files that have
zero lines of changes: it will discount them entirely unless they were
renames.

Which means that the stat output will simply not show files that only
had "other" changes: they were created or deleted, or their mode was
changed.

Now, those changes do show up in the summary, but so do renames, so
the diffstat logic is inconsistent. Why does it show renames with zero
lines changed, but not mode changes or added files with zero lines
changed?

So change the logic to not check for "is_renamed", but for
"is_interesting" instead, where "interesting" is judged to be any
action but a pure data change (because a pure data change with zero
data changed really isn't worth showing, if we ever get one in our
diffpairs).

So if you did

   chmod +x Makefile
   git diff --stat

before, it would show empty (" 0 files changed"), with this it shows

 Makefile | 0
 1 file changed, 0 insertions(+), 0 deletions(-)

which I think is a more correct diffstat (and then with "--summary" it
shows *what* the metadata change to Makefile was - this is completely
consistent with our handling of renamed files).

Side note: the old behavior was *really* odd. With no changes at all,
"git diff --stat" output was empty. With just a chmod, it said "0
files changed". No way is our legacy behavior sane.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-17 11:50:50 -07:00

103 lines
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#!/bin/sh
#
# Copyright (c) 2010, Will Palmer
#
test_description='Test pretty formats'
. ./test-lib.sh
test_expect_success 'set up basic repos' '
>foo &&
>bar &&
git add foo &&
test_tick &&
git commit -m initial &&
git add bar &&
test_tick &&
git commit -m "add bar"
'
test_expect_success 'alias builtin format' '
git log --pretty=oneline >expected &&
git config pretty.test-alias oneline &&
git log --pretty=test-alias >actual &&
test_cmp expected actual
'
test_expect_success 'alias masking builtin format' '
git log --pretty=oneline >expected &&
git config pretty.oneline "%H" &&
git log --pretty=oneline >actual &&
test_cmp expected actual
'
test_expect_success 'alias user-defined format' '
git log --pretty="format:%h" >expected &&
git config pretty.test-alias "format:%h" &&
git log --pretty=test-alias >actual &&
test_cmp expected actual
'
test_expect_success 'alias user-defined tformat' '
git log --pretty="tformat:%h" >expected &&
git config pretty.test-alias "tformat:%h" &&
git log --pretty=test-alias >actual &&
test_cmp expected actual
'
test_expect_success 'alias non-existent format' '
git config pretty.test-alias format-that-will-never-exist &&
test_must_fail git log --pretty=test-alias
'
test_expect_success 'alias of an alias' '
git log --pretty="tformat:%h" >expected &&
git config pretty.test-foo "tformat:%h" &&
git config pretty.test-bar test-foo &&
git log --pretty=test-bar >actual && test_cmp expected actual
'
test_expect_success 'alias masking an alias' '
git log --pretty=format:"Two %H" >expected &&
git config pretty.duplicate "format:One %H" &&
git config --add pretty.duplicate "format:Two %H" &&
git log --pretty=duplicate >actual &&
test_cmp expected actual
'
test_expect_success 'alias loop' '
git config pretty.test-foo test-bar &&
git config pretty.test-bar test-foo &&
test_must_fail git log --pretty=test-foo
'
test_expect_success 'NUL separation' '
printf "add bar\0initial" >expected &&
git log -z --pretty="format:%s" >actual &&
test_cmp expected actual
'
test_expect_success 'NUL termination' '
printf "add bar\0initial\0" >expected &&
git log -z --pretty="tformat:%s" >actual &&
test_cmp expected actual
'
test_expect_success 'NUL separation with --stat' '
stat0_part=$(git diff --stat HEAD^ HEAD) &&
stat1_part=$(git diff-tree --no-commit-id --stat --root HEAD^) &&
printf "add bar\n$stat0_part\n\0initial\n$stat1_part\n" >expected &&
git log -z --stat --pretty="format:%s" >actual &&
test_i18ncmp expected actual
'
test_expect_failure 'NUL termination with --stat' '
stat0_part=$(git diff --stat HEAD^ HEAD) &&
stat1_part=$(git diff-tree --no-commit-id --stat --root HEAD^) &&
printf "add bar\n$stat0_part\n\0initial\n$stat1_part\n\0" >expected &&
git log -z --stat --pretty="tformat:%s" >actual &&
test_i18ncmp expected actual
'
test_done