tests: mark tests relying on the current default for init.defaultBranch

In addition to the manual adjustment to let the `linux-gcc` CI job run
the test suite with `master` and then with `main`, this patch makes sure
that GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME is set in all test scripts
that currently rely on the initial branch name being `master by default.

To determine which test scripts to mark up, the first step was to
force-set the default branch name to `master` in

- all test scripts that contain the keyword `master`,

- t4211, which expects `t/t4211/history.export` with a hard-coded ref to
  initialize the default branch,

- t5560 because it sources `t/t556x_common` which uses `master`,

- t8002 and t8012 because both source `t/annotate-tests.sh` which also
  uses `master`)

This trick was performed by this command:

	$ sed -i '/^ *\. \.\/\(test-lib\|lib-\(bash\|cvs\|git-svn\)\|gitweb-lib\)\.sh$/i\
	GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master\
	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME\
	' $(git grep -l master t/t[0-9]*.sh) \
	t/t4211*.sh t/t5560*.sh t/t8002*.sh t/t8012*.sh

After that, careful, manual inspection revealed that some of the test
scripts containing the needle `master` do not actually rely on a
specific default branch name: either they mention `master` only in a
comment, or they initialize that branch specificially, or they do not
actually refer to the current default branch. Therefore, the
aforementioned modification was undone in those test scripts thusly:

	$ git checkout HEAD -- \
		t/t0027-auto-crlf.sh t/t0060-path-utils.sh \
		t/t1011-read-tree-sparse-checkout.sh \
		t/t1305-config-include.sh t/t1309-early-config.sh \
		t/t1402-check-ref-format.sh t/t1450-fsck.sh \
		t/t2024-checkout-dwim.sh \
		t/t2106-update-index-assume-unchanged.sh \
		t/t3040-subprojects-basic.sh t/t3301-notes.sh \
		t/t3308-notes-merge.sh t/t3423-rebase-reword.sh \
		t/t3436-rebase-more-options.sh \
		t/t4015-diff-whitespace.sh t/t4257-am-interactive.sh \
		t/t5323-pack-redundant.sh t/t5401-update-hooks.sh \
		t/t5511-refspec.sh t/t5526-fetch-submodules.sh \
		t/t5529-push-errors.sh t/t5530-upload-pack-error.sh \
		t/t5548-push-porcelain.sh \
		t/t5552-skipping-fetch-negotiator.sh \
		t/t5572-pull-submodule.sh t/t5608-clone-2gb.sh \
		t/t5614-clone-submodules-shallow.sh \
		t/t7508-status.sh t/t7606-merge-custom.sh \
		t/t9302-fast-import-unpack-limit.sh

We excluded one set of test scripts in these commands, though: the range
of `git p4` tests. The reason? `git p4` stores the (foreign) remote
branch in the branch called `p4/master`, which is obviously not the
default branch. Manual analysis revealed that only five of these tests
actually require a specific default branch name to pass; They were
modified thusly:

	$ sed -i '/^ *\. \.\/lib-git-p4\.sh$/i\
	GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master\
	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME\
	' t/t980[0167]*.sh t/t9811*.sh

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

ci/run-build-and-tests.sh

@@ -13,6 +13,7 @@ esac
 make
 case "$jobname" in
 linux-gcc)
+	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 	make test
 	export GIT_TEST_SPLIT_INDEX=yes
 	export GIT_TEST_FULL_IN_PACK_ARRAY=true
@@ -22,6 +23,7 @@ linux-gcc)
 	export GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=1
 	export GIT_TEST_MULTI_PACK_INDEX=1
 	export GIT_TEST_ADD_I_USE_BUILTIN=1
+	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
 	make test
 	;;
 linux-clang)

t/t0002-gitfile.sh

@@ -4,6 +4,9 @@ test_description='.git file
 
 Verify that plumbing commands work when .git is a file
 '
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 objpath() {

t/t0020-crlf.sh

@@ -2,6 +2,9 @@
 
 test_description='CRLF conversion'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 has_cr() {

t/t0021-conversion.sh

@@ -2,6 +2,9 @@
 
 test_description='blob conversion via gitattributes'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 TEST_ROOT="$PWD"

t/t0028-working-tree-encoding.sh

@@ -2,6 +2,9 @@
 
 test_description='working-tree-encoding conversion via gitattributes'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 GIT_TRACE_WORKING_TREE_ENCODING=1 && export GIT_TRACE_WORKING_TREE_ENCODING

t/t0041-usage.sh

@@ -2,6 +2,9 @@
 
 test_description='Test commands behavior when given invalid argument value'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup ' '

t/t0050-filesystem.sh

@@ -2,6 +2,9 @@
 
 test_description='Various filesystem issues'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 auml=$(printf '\303\244')

t/t0100-previous.sh

@@ -2,6 +2,9 @@
 
 test_description='previous branch syntax @{-n}'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'branch -d @{-1}' '

t/t1004-read-tree-m-u-wf.sh

@@ -2,6 +2,9 @@
 
 test_description='read-tree -m -u checks working tree files'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-read-tree.sh
 

t/t1008-read-tree-overlay.sh

@@ -2,6 +2,9 @@
 
 test_description='test multi-tree read-tree without merging'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-read-tree.sh
 

t/t1009-read-tree-new-index.sh

@@ -2,6 +2,9 @@
 
 test_description='test read-tree into a fresh index file'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t1021-rerere-in-workdir.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='rerere run in a workdir'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success SYMLINKS setup '

t/t1090-sparse-checkout-scope.sh

@@ -2,6 +2,9 @@
 
 test_description='sparse checkout scope tests'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t1091-sparse-checkout-builtin.sh

@@ -2,6 +2,9 @@
 
 test_description='sparse checkout builtin tests'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 list_files() {

t/t1300-config.sh

@@ -5,6 +5,9 @@
 
 test_description='Test git config in different settings'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'clear default config' '

t/t1301-shared-repo.sh

@@ -5,6 +5,9 @@
 
 test_description='Test shared repository initialization'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 # Remove a default ACL from the test dir if possible.

t/t1400-update-ref.sh

@@ -4,6 +4,9 @@
 #
 
 test_description='Test git update-ref and basic ref logging'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 Z=$ZERO_OID

t/t1403-show-ref.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='show-ref'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t1405-main-ref-store.sh

@@ -2,6 +2,9 @@
 
 test_description='test main ref store api'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 RUN="test-tool ref-store main"

t/t1406-submodule-ref-store.sh

@@ -2,6 +2,9 @@
 
 test_description='test submodule ref store api'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 RUN="test-tool ref-store submodule:sub"

t/t1407-worktree-ref-store.sh

@@ -2,6 +2,9 @@
 
 test_description='test worktree ref store api'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 RWT="test-tool ref-store worktree:wt"

t/t1408-packed-refs.sh

@@ -2,6 +2,9 @@
 
 test_description='packed-refs entries are covered by loose refs'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t1410-reflog.sh

@@ -4,6 +4,9 @@
 #
 
 test_description='Test prune and reflog expiration'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 check_have () {

t/t1411-reflog-show.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='Test reflog display routines'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t1413-reflog-detach.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='Test reflog interaction with detached HEAD'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 reset_state () {

t/t1414-reflog-walk.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='various tests of reflog walk (log -g) behavior'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'set up some reflog entries' '

t/t1416-ref-transaction-hooks.sh

@@ -2,6 +2,9 @@
 
 test_description='reference transaction hooks'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t1430-bad-ref-name.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='Test handling of ref names that check-ref-format rejects'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t1500-rev-parse.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='test git rev-parse'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 # usage: [options] label is-bare is-inside-git is-inside-work prefix git-dir absolute-git-dir

t/t1503-rev-parse-verify.sh

@@ -6,6 +6,9 @@ test_description='test git rev-parse --verify'
 
 exec </dev/null
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 add_line_into_file()

t/t1505-rev-parse-last.sh

@@ -2,6 +2,9 @@
 
 test_description='test @{-N} syntax'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 

t/t1506-rev-parse-diagnosis.sh

@@ -4,6 +4,9 @@ test_description='test git rev-parse diagnosis for invalid argument'
 
 exec </dev/null
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_did_you_mean ()

t/t1507-rev-parse-upstream.sh

@@ -2,6 +2,9 @@
 
 test_description='test <branch>@{upstream} syntax'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 

t/t1508-at-combinations.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='test various @{X} syntax combinations together'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 check() {

t/t1511-rev-parse-caret.sh

@@ -2,6 +2,9 @@
 
 test_description='tests for ref^{stuff}'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t1512-rev-parse-disambiguation.sh

@@ -20,6 +20,9 @@ one tagged as v1.0.0.  They all have one regular file each.
 
 '
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 if ! test_have_prereq SHA1

t/t1513-rev-parse-prefix.sh

@@ -2,6 +2,9 @@
 
 test_description='Tests for rev-parse --prefix'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t1514-rev-parse-push.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='test <branch>@{push} syntax'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 resolve () {

t/t1700-split-index.sh

@@ -2,6 +2,9 @@
 
 test_description='split index mode tests'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 # We need total control of index splitting here

t/t2007-checkout-symlink.sh

@@ -4,6 +4,9 @@
 
 test_description='git checkout to switch between branches with symlink<->dir'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t2009-checkout-statinfo.sh

@@ -2,6 +2,9 @@
 
 test_description='checkout should leave clean stat info'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t2010-checkout-ambiguous.sh

@@ -2,6 +2,9 @@
 
 test_description='checkout and pathspecs/refspecs ambiguities'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t2011-checkout-invalid-head.sh

@@ -2,6 +2,9 @@
 
 test_description='checkout switching away from an invalid branch'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t2012-checkout-last.sh

@@ -2,6 +2,9 @@
 
 test_description='checkout can switch to last branch and merge base'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t2015-checkout-unborn.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='checkout from unborn branch'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t2017-checkout-orphan.sh

@@ -7,6 +7,9 @@ test_description='git checkout --orphan
 
 Main Tests for --orphan functionality.'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 TEST_FILE=foo

t/t2020-checkout-detach.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='checkout into detached HEAD state'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 check_detached () {

t/t2022-checkout-paths.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='checkout $tree -- $paths'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t2023-checkout-m.sh

@@ -4,6 +4,9 @@ test_description='checkout -m -- <conflicted path>
 
 Ensures that checkout -m on a resolved file restores the conflicted file'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t2027-checkout-track.sh

@@ -2,6 +2,9 @@
 
 test_description='tests for git branch --track'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t2030-unresolve-info.sh

@@ -2,6 +2,9 @@
 
 test_description='undoing resolution'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 check_resolve_undo () {

t/t2060-switch.sh

@@ -2,6 +2,9 @@
 
 test_description='switch basic functionality'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t2070-restore.sh

@@ -2,6 +2,9 @@
 
 test_description='restore basic functionality'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t2400-worktree-add.sh

@@ -2,6 +2,9 @@
 
 test_description='test git worktree add'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 . "$TEST_DIRECTORY"/lib-rebase.sh

t/t2401-worktree-prune.sh

@@ -2,6 +2,9 @@
 
 test_description='prune $GIT_DIR/worktrees'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success initialize '

t/t2402-worktree-list.sh

@@ -2,6 +2,9 @@
 
 test_description='test git worktree list'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t2405-worktree-submodule.sh

@@ -2,6 +2,9 @@
 
 test_description='Combination of submodules and multiple worktrees'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 base_path=$(pwd -P)

t/t3200-branch.sh

@@ -5,6 +5,9 @@
 
 test_description='git branch assorted tests'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-rebase.sh
 

t/t3201-branch-contains.sh

@@ -2,6 +2,9 @@
 
 test_description='branch --contains <commit>, --no-contains <commit> --merged, and --no-merged'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t3202-show-branch-octopus.sh

@@ -2,6 +2,9 @@
 
 test_description='test show-branch with more than 8 heads'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 numbers="1 2 3 4 5 6 7 8 9 10"

t/t3203-branch-output.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='git branch display tests'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-terminal.sh
 

t/t3204-branch-name-interpretation.sh

@@ -6,6 +6,9 @@ Branch name arguments are usually names which are taken to be inside of
 refs/heads/, but we interpret some magic syntax like @{-1}, @{upstream}, etc.
 This script aims to check the behavior of those corner cases.
 '
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 expect_branch() {

t/t3205-branch-color.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='basic branch output coloring'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'set up some sample branches' '

t/t3206-range-diff.sh

@@ -2,6 +2,9 @@
 
 test_description='range-diff tests'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 # Note that because of the range-diff's heuristics, test_commit does more

t/t3210-pack-refs.sh

@@ -9,6 +9,9 @@ test_description='git pack-refs should not change the branch semantic
 This test runs git pack-refs and git show-ref and checks that the branch
 semantic is still the same.
 '
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'enable reflogs' '

t/t3211-peel-ref.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 
 test_description='tests for the peel_ref optimization of packed-refs'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'create annotated tag in refs/tags' '

t/t3302-notes-index-expensive.sh

@@ -5,6 +5,9 @@
 
 test_description='Test commit notes index (expensive!)'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 create_repo () {

t/t3303-notes-subtrees.sh

@@ -2,6 +2,9 @@
 
 test_description='Test commit notes organized in subtrees'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 number_of_commits=100

t/t3304-notes-mixed.sh

@@ -2,6 +2,9 @@
 
 test_description='Test notes trees that also contain non-notes'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 number_of_commits=100

t/t3320-notes-merge-worktrees.sh

@@ -5,6 +5,9 @@
 
 test_description='Test merging of notes trees in multiple worktrees'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup commit' '

t/t3400-rebase.sh

@@ -8,6 +8,9 @@ test_description='git rebase assorted tests
 This test runs git rebase and checks that the author information is not lost
 among other things.
 '
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 GIT_AUTHOR_NAME=author@name

t/t3402-rebase-merge.sh

@@ -5,6 +5,9 @@
 
 test_description='git rebase --merge test'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 T="A quick brown fox

t/t3403-rebase-skip.sh

@@ -5,6 +5,9 @@
 
 test_description='git rebase --merge --skip tests'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 . "$TEST_DIRECTORY"/lib-rebase.sh

t/t3404-rebase-interactive.sh

@@ -25,6 +25,9 @@ Initial setup:
  where A, B, D and G all touch file1, and one, two, three, four all
  touch file "conflict".
 '
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 . "$TEST_DIRECTORY"/lib-rebase.sh

t/t3405-rebase-malformed.sh

@@ -2,6 +2,9 @@
 
 test_description='rebase should handle arbitrary git message'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-rebase.sh
 

t/t3406-rebase-message.sh

@@ -2,6 +2,9 @@
 
 test_description='messages from rebase operation'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t3407-rebase-abort.sh

@@ -2,6 +2,9 @@
 
 test_description='git rebase --abort tests'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 ### Test that we handle space characters properly

t/t3408-rebase-multi-line.sh

@@ -2,6 +2,9 @@
 
 test_description='rebasing a commit with multi-line first paragraph.'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t3409-rebase-preserve-merges.sh

@@ -6,6 +6,9 @@ test_description='git rebase -p should preserve merges
 
 Run "git rebase -p" and check that merges are properly carried along
 '
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 if ! test_have_prereq REBASE_P; then

t/t3412-rebase-root.sh

@@ -4,6 +4,9 @@ test_description='git rebase --root
 
 Tests if git rebase --root --onto <newparent> can rebase the root commit.
 '
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 log_with_names () {

t/t3413-rebase-hook.sh

@@ -2,6 +2,9 @@
 
 test_description='git rebase with its hook(s)'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t3415-rebase-autosquash.sh

@@ -2,6 +2,9 @@
 
 test_description='auto squash'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 . "$TEST_DIRECTORY"/lib-rebase.sh

t/t3416-rebase-onto-threedots.sh

@@ -2,6 +2,9 @@
 
 test_description='git rebase --onto A...B'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 . "$TEST_DIRECTORY/lib-rebase.sh"
 

t/t3418-rebase-continue.sh

@@ -2,6 +2,9 @@
 
 test_description='git rebase --continue tests'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 . "$TEST_DIRECTORY"/lib-rebase.sh

t/t3419-rebase-patch-id.sh

@@ -2,6 +2,9 @@
 
 test_description='git rebase - test patch id computation'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 scramble () {

t/t3420-rebase-autostash.sh

@@ -4,6 +4,9 @@
 #
 
 test_description='git rebase --autostash tests'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t3427-rebase-subtree.sh

@@ -4,6 +4,9 @@ test_description='git rebase tests for -Xsubtree
 
 This test runs git rebase and tests the subtree strategy.
 '
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-rebase.sh
 

t/t3430-rebase-merges.sh

@@ -18,6 +18,9 @@ Initial setup:
      \
       Conflicting-G
 '
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-rebase.sh
 . "$TEST_DIRECTORY"/lib-log-graph.sh

t/t3431-rebase-fork-point.sh

@@ -5,6 +5,9 @@
 
 test_description='git rebase --fork-point test'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 # A---B---D---E    (master)

t/t3432-rebase-fast-forward.sh

@@ -5,6 +5,9 @@
 
 test_description='ensure rebase fast-forwards commits when possible'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t3434-rebase-i18n.sh

@@ -14,6 +14,9 @@ Initial setup:
     5 - 6          second
 '
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 compare_msg () {

t/t3435-rebase-gpg-sign.sh

@@ -5,6 +5,9 @@
 
 test_description='test rebase --[no-]gpg-sign'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 . "$TEST_DIRECTORY/lib-rebase.sh"
 . "$TEST_DIRECTORY/lib-gpg.sh"

t/t3500-cherry.sh

@@ -8,6 +8,9 @@ test_description='git cherry should detect patches integrated upstream
 This test cherry-picks one local change of two into master branch, and
 checks that git cherry only returns the second patch in the local branch
 '
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 GIT_AUTHOR_EMAIL=bogus_email_address

t/t3501-revert-cherry-pick.sh

@@ -10,6 +10,9 @@ test_description='test cherry-pick and revert with renames
 
 '
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t3502-cherry-pick-merge.sh

@@ -8,6 +8,9 @@ test_description='cherry picking and reverting a merge
 
 '
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t3503-cherry-pick-root.sh

@@ -2,6 +2,9 @@
 
 test_description='test cherry-picking (and reverting) a root commit'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t3504-cherry-pick-rerere.sh

@@ -2,6 +2,9 @@
 
 test_description='cherry-pick should rerere for conflicts'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t3505-cherry-pick-empty.sh

@@ -2,6 +2,9 @@
 
 test_description='test cherry-picking an empty commit'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t3506-cherry-pick-ff.sh

@@ -2,6 +2,9 @@
 
 test_description='test cherry-picking with --ff option'
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 test_expect_success setup '

t/t3507-cherry-pick-conflict.sh

@@ -9,6 +9,9 @@ test_description='test cherry-pick and revert with conflicts
 
 '
 
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
 . ./test-lib.sh
 
 pristine_detach () {