Merge branch 'kl/mailmap-corner-case-and-misc-fixes' into master

Signed-off-by: Elijah Newren <newren@gmail.com>

.gitignore

@@ -0,0 +1,2 @@
+/t/test-results
+/t/trash directory*

git-filter-repo

@@ -267,7 +267,7 @@ class MailmapInfo(object):
     self._parse_file(filename)
 
   def _parse_file(self, filename):
-    name_and_email_re = re.compile(br'(.*?)\s*<([^>]+)>\s*')
+    name_and_email_re = re.compile(br'(.*?)\s*<([^>]*)>\s*')
     comment_re = re.compile(br'\s*#.*')
     if not os.access(filename, os.R_OK):
       raise SystemExit(_("Cannot read %s") % decode(filename))
@@ -3562,7 +3562,7 @@ class RepoFilter(object):
       self._output = open(self._fe_filt, 'bw')
     else:
       self._output = self._fip.stdin
-    if self._args.debug:
+    if self._args.debug and not self._args.dry_run:
       self._output = DualFileWriter(self._fip.stdin, self._output)
       tmp = [decode(x) if isinstance(x, bytes) else x for x in fip_cmd]
       print("[DEBUG] Running: {}".format(' '.join(tmp)))

t/t9390-filter-repo.sh

@@ -48,6 +48,7 @@ filter_testcase degenerate degenerate-keepme   --path moduleA/keepme
 filter_testcase degenerate degenerate-moduleA  --path moduleA
 filter_testcase degenerate degenerate-globme   --path-glob *me
 filter_testcase unusual unusual-filtered --path ''
+filter_testcase unusual unusual-mailmap  --mailmap ../t9390/sample-mailmap
 
 test_expect_success 'setup path_rename' '
 	test_create_repo path_rename &&
@@ -443,6 +444,33 @@ test_expect_success '--dry-run' '
 	)
 '
 
+test_expect_success '--dry-run --debug' '
+	(
+		git clone file://"$(pwd)"/metasyntactic dry_run_debug &&
+		cd dry_run_debug &&
+
+		git filter-repo --path words --dry-run --debug &&
+
+		git show-ref | grep master >out &&
+		test_line_count = 2 out &&
+		awk "{print \$1}" out | uniq >out2 &&
+		test_line_count = 1 out2 &&
+
+		test $(git rev-list --count HEAD) = 3 &&
+		git cat-file --batch-check --batch-all-objects >all-objs &&
+		test_line_count = 19 all-objs &&
+		git log --format=%n --name-only | sort | uniq >filenames &&
+		test_line_count = 9 filenames &&
+
+		test_path_is_file .git/filter-repo/fast-export.original &&
+		grep "^commit " .git/filter-repo/fast-export.original >out &&
+		test_line_count = 3 out &&
+		test_path_is_file .git/filter-repo/fast-export.filtered &&
+		grep "^commit " .git/filter-repo/fast-export.filtered >out &&
+		test_line_count = 2 out
+	)
+'
+
 test_expect_success '--dry-run --stdin' '
 	(
 		git clone file://"$(pwd)"/metasyntactic dry_run_stdin &&

t/t9390/sample-mailmap

@@ -4,3 +4,4 @@ Little 'ol Me <me@little.net>
 Little 'ol Me <me@little.net> Little O. Me
 Little 'ol Me <me@little.net> <me@fire.com>
 Little 'ol Me <me@little.net> Little Me <me@bigcompany.com>
+Little John <second@merry.men> little.john <>

t/t9390/unusual

@@ -28,7 +28,7 @@ from :2
 tag v1.0
 from :2
 original-oid 0000000000000000000000000000000000000003
-tagger Little John <second@merry.men> 1535229618 -0700
+tagger little.john <> 1535229618 -0700
 data 4
 v1.0
 

t/t9390/unusual-filtered

@@ -17,7 +17,7 @@ from :2
 
 tag v1.0
 from :2
-tagger Little John <second@merry.men> 1535229618 -0700
+tagger little.john <> 1535229618 -0700
 data 4
 v1.0
 done

t/t9390/unusual-mailmap

@@ -0,0 +1,23 @@
+feature done
+blob
+mark :1
+data 5
+hello
+reset refs/heads/develop
+commit refs/heads/develop
+mark :2
+author Srinivasa Ramanujan <fellow@cambridge.org> 1535228562 +0261
+committer Srinivasa Ramanujan <fellow@cambridge.org> 1535228562 +0261
+data 8
+Initial
+M 100644 :1 greeting
+
+reset refs/heads/master
+from :2
+
+tag v1.0
+from :2
+tagger Little John <second@merry.men> 1535229618 -0700
+data 4
+v1.0
+done