Merge branch 'jk/fast-export-anonymize'

Sometimes users want to report a bug they experience on their
repository, but they are not at liberty to share the contents of
the repository.  "fast-export" was taught an "--anonymize" option
to replace blob contents, names of people and paths and log
messages with bland and simple strings to help them.

* jk/fast-export-anonymize:
  docs/fast-export: explain --anonymize more completely
  teach fast-export an --anonymize option

1 files changed, 112 insertions, 0 deletions

diff --git a/t/t9351-fast-export-anonymize.sh b/t/t9351-fast-export-anonymize.sh
new file mode 100755
index 0000000000..897dc50907
--- /dev/null
+++ b/t/t9351-fast-export-anonymize.sh
@@ -0,0 +1,112 @@
+#!/bin/sh
+
+test_description='basic tests for fast-export --anonymize'
+. ./test-lib.sh
+
+test_expect_success 'setup simple repo' '
+	test_commit base &&
+	test_commit foo &&
+	git checkout -b other HEAD^ &&
+	mkdir subdir &&
+	test_commit subdir/bar &&
+	test_commit subdir/xyzzy &&
+	git tag -m "annotated tag" mytag
+'
+
+test_expect_success 'export anonymized stream' '
+	git fast-export --anonymize --all >stream
+'
+
+# this also covers commit messages
+test_expect_success 'stream omits path names' '
+	! grep base stream &&
+	! grep foo stream &&
+	! grep subdir stream &&
+	! grep bar stream &&
+	! grep xyzzy stream
+'
+
+test_expect_success 'stream allows master as refname' '
+	grep master stream
+'
+
+test_expect_success 'stream omits other refnames' '
+	! grep other stream &&
+	! grep mytag stream
+'
+
+test_expect_success 'stream omits identities' '
+	! grep "$GIT_COMMITTER_NAME" stream &&
+	! grep "$GIT_COMMITTER_EMAIL" stream &&
+	! grep "$GIT_AUTHOR_NAME" stream &&
+	! grep "$GIT_AUTHOR_EMAIL" stream
+'
+
+test_expect_success 'stream omits tag message' '
+	! grep "annotated tag" stream
+'
+
+# NOTE: we chdir to the new, anonymized repository
+# after this. All further tests should assume this.
+test_expect_success 'import stream to new repository' '
+	git init new &&
+	cd new &&
+	git fast-import <../stream
+'
+
+test_expect_success 'result has two branches' '
+	git for-each-ref --format="%(refname)" refs/heads >branches &&
+	test_line_count = 2 branches &&
+	other_branch=$(grep -v refs/heads/master branches)
+'
+
+test_expect_success 'repo has original shape and timestamps' '
+	shape () {
+		git log --format="%m %ct" --left-right --boundary "$@"
+	} &&
+	(cd .. && shape master...other) >expect &&
+	shape master...$other_branch >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'root tree has original shape' '
+	# the output entries are not necessarily in the same
+	# order, but we know at least that we will have one tree
+	# and one blob, so just check the sorted order
+	cat >expect <<-\EOF &&
+	blob
+	tree
+	EOF
+	git ls-tree $other_branch >root &&
+	cut -d" " -f2 <root | sort >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'paths in subdir ended up in one tree' '
+	cat >expect <<-\EOF &&
+	blob
+	blob
+	EOF
+	tree=$(grep tree root | cut -f2) &&
+	git ls-tree $other_branch:$tree >tree &&
+	cut -d" " -f2 <tree >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'tag points to branch tip' '
+	git rev-parse $other_branch >expect &&
+	git for-each-ref --format="%(*objectname)" | grep . >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'idents are shared' '
+	git log --all --format="%an <%ae>" >authors &&
+	sort -u authors >unique &&
+	test_line_count = 1 unique &&
+	git log --all --format="%cn <%ce>" >committers &&
+	sort -u committers >unique &&
+	test_line_count = 1 unique &&
+	! test_cmp authors committers
+'
+
+test_done