merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 15 insertions, 8 deletions

diff --git a/third_party/git/t/t4038-diff-combined.sh b/third_party/git/t/t4038-diff-combined.sh
index d4afe12554..94680836ce 100755
--- a/third_party/git/t/t4038-diff-combined.sh
+++ b/third_party/git/t/t4038-diff-combined.sh
@@ -354,7 +354,7 @@ test_expect_failure 'combine diff coalesce three parents' '
 '
 
 # Test for a bug reported at
-# https://public-inbox.org/git/20130515143508.GO25742@login.drsnuggles.stderr.nl/
+# https://lore.kernel.org/git/20130515143508.GO25742@login.drsnuggles.stderr.nl/
 # where a delete lines were missing from combined diff output when they
 # occurred exactly before the context lines of a later change.
 test_expect_success 'combine diff missing delete bug' '
@@ -440,11 +440,13 @@ test_expect_success 'setup for --combined-all-paths' '
 	git branch side2c &&
 	git checkout side1c &&
 	test_seq 1 10 >filename-side1c &&
+	side1cf=$(git hash-object filename-side1c) &&
 	git add filename-side1c &&
 	git commit -m with &&
 	git checkout side2c &&
 	test_seq 1 9 >filename-side2c &&
 	echo ten >>filename-side2c &&
+	side2cf=$(git hash-object filename-side2c) &&
 	git add filename-side2c &&
 	git commit -m iam &&
 	git checkout -b mergery side1c &&
@@ -452,13 +454,14 @@ test_expect_success 'setup for --combined-all-paths' '
 	git rm filename-side1c &&
 	echo eleven >>filename-side2c &&
 	git mv filename-side2c filename-merged &&
+	mergedf=$(git hash-object filename-merged) &&
 	git add filename-merged &&
 	git commit
 '
 
 test_expect_success '--combined-all-paths and --raw' '
-	cat <<-\EOF >expect &&
-	::100644 100644 100644 f00c965d8307308469e537302baa73048488f162 088bd5d92c2a8e0203ca8e7e4c2a5c692f6ae3f7 333b9c62519f285e1854830ade0fe1ef1d40ee1b RR	filename-side1c	filename-side2c	filename-merged
+	cat <<-EOF >expect &&
+	::100644 100644 100644 $side1cf $side2cf $mergedf RR	filename-side1c	filename-side2c	filename-merged
 	EOF
 	git diff-tree -c -M --raw --combined-all-paths HEAD >actual.tmp &&
 	sed 1d <actual.tmp >actual &&
@@ -482,11 +485,13 @@ test_expect_success FUNNYNAMES 'setup for --combined-all-paths with funny names'
 	git checkout side1d &&
 	test_seq 1 10 >"$(printf "file\twith\ttabs")" &&
 	git add file* &&
+	side1df=$(git hash-object *tabs) &&
 	git commit -m with &&
 	git checkout side2d &&
 	test_seq 1 9 >"$(printf "i\tam\ttabbed")" &&
 	echo ten >>"$(printf "i\tam\ttabbed")" &&
 	git add *tabbed &&
+	side2df=$(git hash-object *tabbed) &&
 	git commit -m iam &&
 	git checkout -b funny-names-mergery side1d &&
 	git merge --no-commit side2d &&
@@ -494,12 +499,14 @@ test_expect_success FUNNYNAMES 'setup for --combined-all-paths with funny names'
 	echo eleven >>"$(printf "i\tam\ttabbed")" &&
 	git mv "$(printf "i\tam\ttabbed")" "$(printf "fickle\tnaming")" &&
 	git add fickle* &&
-	git commit
+	headf=$(git hash-object fickle*) &&
+	git commit &&
+	head=$(git rev-parse HEAD)
 '
 
 test_expect_success FUNNYNAMES '--combined-all-paths and --raw and funny names' '
-	cat <<-\EOF >expect &&
-	::100644 100644 100644 f00c965d8307308469e537302baa73048488f162 088bd5d92c2a8e0203ca8e7e4c2a5c692f6ae3f7 333b9c62519f285e1854830ade0fe1ef1d40ee1b RR	"file\twith\ttabs"	"i\tam\ttabbed"	"fickle\tnaming"
+	cat <<-EOF >expect &&
+	::100644 100644 100644 $side1df $side2df $headf RR	"file\twith\ttabs"	"i\tam\ttabbed"	"fickle\tnaming"
 	EOF
 	git diff-tree -c -M --raw --combined-all-paths HEAD >actual.tmp &&
 	sed 1d <actual.tmp >actual &&
@@ -507,9 +514,9 @@ test_expect_success FUNNYNAMES '--combined-all-paths and --raw and funny names'
 '
 
 test_expect_success FUNNYNAMES '--combined-all-paths and --raw -and -z and funny names' '
-	printf "aaf8087c3cbd4db8e185a2d074cf27c53cfb75d7\0::100644 100644 100644 f00c965d8307308469e537302baa73048488f162 088bd5d92c2a8e0203ca8e7e4c2a5c692f6ae3f7 333b9c62519f285e1854830ade0fe1ef1d40ee1b RR\0file\twith\ttabs\0i\tam\ttabbed\0fickle\tnaming\0" >expect &&
+	printf "$head\0::100644 100644 100644 $side1df $side2df $headf RR\0file\twith\ttabs\0i\tam\ttabbed\0fickle\tnaming\0" >expect &&
 	git diff-tree -c -M --raw --combined-all-paths -z HEAD >actual &&
-	test_cmp -a expect actual
+	test_cmp expect actual
 '
 
 test_expect_success FUNNYNAMES '--combined-all-paths and --cc and funny names' '