pkgtools/pkglint: update to 21.2.1

Changes since 21.2.0:

Files whose names ends in '~' are ignored by pkglint since they are
ignored by CVS as well.

Variables with name BUILDLINK_TRANSFORM.* may contain '-Wl,-rpath,'
directly in commands of the form 'rm:*', just like their counterpart
BUILDLINK_TRANSFORM without a package name in the variable name.

Several new tests.

22 files changed, 727 insertions, 54 deletions

diff --git a/pkgtools/pkglint/Makefile b/pkgtools/pkglint/Makefile
index 36ce1832bc6..7db6c96df77 100644
--- a/pkgtools/pkglint/Makefile
+++ b/pkgtools/pkglint/Makefile
@@ -1,6 +1,6 @@
-# $NetBSD: Makefile,v 1.689 2021/06/17 09:11:55 rillig Exp $
+# $NetBSD: Makefile,v 1.690 2021/06/25 14:15:00 rillig Exp $
 
-PKGNAME=	pkglint-21.2.0
+PKGNAME=	pkglint-21.2.1
 CATEGORIES=	pkgtools
 DISTNAME=	tools
 MASTER_SITES=	${MASTER_SITE_GITHUB:=golang/}
diff --git a/pkgtools/pkglint/files/check_test.go b/pkgtools/pkglint/files/check_test.go
index 96428730629..d0e9deb5539 100644
--- a/pkgtools/pkglint/files/check_test.go
+++ b/pkgtools/pkglint/files/check_test.go
@@ -104,13 +104,6 @@ func (s *Suite) TearDownTest(c *check.C) {
 func Test__qa(t *testing.T) {
 	ck := intqa.NewQAChecker(t.Errorf)
 
-	ck.Configure("distinfo.go", "*", "*", -intqa.EMissingTest)       // TODO
-	ck.Configure("files.go", "*", "*", -intqa.EMissingTest)          // TODO
-	ck.Configure("licenses.go", "*", "*", -intqa.EMissingTest)       // TODO
-	ck.Configure("line.go", "*", "*", -intqa.EMissingTest)           // TODO
-	ck.Configure("linechecker.go", "*", "*", -intqa.EMissingTest)    // TODO
-	ck.Configure("lines.go", "*", "*", -intqa.EMissingTest)          // TODO
-	ck.Configure("logging.go", "*", "*", -intqa.EMissingTest)        // TODO
 	ck.Configure("mkline.go", "*", "*", -intqa.EMissingTest)         // TODO
 	ck.Configure("mklineparser.go", "*", "*", -intqa.EMissingTest)   // TODO
 	ck.Configure("mklinechecker.go", "*", "*", -intqa.EMissingTest)  // TODO
diff --git a/pkgtools/pkglint/files/distinfo_test.go b/pkgtools/pkglint/files/distinfo_test.go
index 525fb2288fc..dfe065458ab 100644
--- a/pkgtools/pkglint/files/distinfo_test.go
+++ b/pkgtools/pkglint/files/distinfo_test.go
@@ -877,6 +877,63 @@ func (s *Suite) Test_distinfoLinesChecker_checkPatchSha1(c *check.C) {
 		"ERROR: ~/category/package/distinfo:5: Patch patch-nonexistent does not exist.")
 }
 
+func (s *Suite) Test_distinfoFileInfo_filename(c *check.C) {
+	t := s.Init(c)
+
+	info := distinfoFileInfo{
+		isPatch: no,
+		hashes: []distinfoHash{{
+			line:      t.NewLine("irrelevant", 12345, "irrelevant"),
+			filename:  "distinfo",
+			algorithm: "irrelevant",
+			hash:      "irrelevant",
+		}},
+	}
+
+	t.CheckEquals(info.filename(), RelPath("distinfo"))
+}
+
+func (s *Suite) Test_distinfoFileInfo_line(c *check.C) {
+	t := s.Init(c)
+
+	line := t.NewLine("irrelevant", 12345, "irrelevant")
+	info := distinfoFileInfo{
+		isPatch: no,
+		hashes: []distinfoHash{{
+			line:      line,
+			filename:  "irrelevant",
+			algorithm: "irrelevant",
+			hash:      "irrelevant",
+		}},
+	}
+
+	t.CheckEquals(info.line(), line)
+}
+
+func (s *Suite) Test_distinfoFileInfo_algorithms(c *check.C) {
+	t := s.Init(c)
+
+	info := distinfoFileInfo{
+		isPatch: no,
+		hashes: []distinfoHash{
+			{
+				line:      t.NewLine("irrelevant", 12345, "irrelevant"),
+				filename:  "irrelevant",
+				algorithm: "SHA1",
+				hash:      "irrelevant",
+			},
+			{
+				line:      t.NewLine("irrelevant", 12346, "irrelevant"),
+				filename:  "irrelevant",
+				algorithm: "Size",
+				hash:      "irrelevant",
+			},
+		},
+	}
+
+	t.CheckEquals(info.algorithms(), "SHA1, Size")
+}
+
 // The check for versioned distfiles only makes sense if the file
 // has the usual hashes for distfiles.
 func (s *Suite) Test_distinfoFileInfo_hasDistfileAlgorithms__code_coverage(c *check.C) {
@@ -920,3 +977,41 @@ func (s *Suite) Test_distinfoFileInfo_hasDistfileAlgorithms__code_coverage(c *ch
 		"ERROR: distinfo:15: Expected SHA1, RMD160, SHA512, Size checksums for "+
 			"\"dist-d.tar.gz\", got SHA1, RMD160, SHA512, other.")
 }
+
+func (s *Suite) Test_computePatchSha1Hex(c *check.C) {
+	t := s.Init(c)
+
+	test := func(expectedHash string, lines ...string) {
+		fileLines := t.NewLines("irrelevant", lines...)
+
+		hash := computePatchSha1Hex(fileLines)
+
+		t.CheckEquals(hash, expectedHash)
+	}
+
+	// The well-known hash for an empty string.
+	test(
+		"da39a3ee5e6b4b0d3255bfef95601890afd80709",
+		nil...,
+	)
+
+	// Any line containing "$" + "NetBSD" is ignored for computing
+	// the hash since the CVS IDs are irrelevant.  This assumes that
+	// the patch hunks themselves do not contain CVS IDs, and this
+	// is checked in PatchChecker.checktextCvsID.
+	test(
+		"da39a3ee5e6b4b0d3255bfef95601890afd80709",
+		CvsID,
+		CvsID+"$",
+		// This is not a CVS ID since the final '$' is missing, but it is
+		// close enough. See mk/checksum/distinfo.awk, function patchsum.
+		"Some text $"+"NetBSD-2020",
+	)
+
+	test(
+		// == sha1Hex("--- old\n+++ new\n")
+		"bb5a3903635415d367f47c02990e031469ab0346",
+		"--- old",
+		"+++ new",
+	)
+}
diff --git a/pkgtools/pkglint/files/files_test.go b/pkgtools/pkglint/files/files_test.go
index 6dcdc7d4d80..7cd406d9693 100644
--- a/pkgtools/pkglint/files/files_test.go
+++ b/pkgtools/pkglint/files/files_test.go
@@ -4,6 +4,23 @@ import (
 	"gopkg.in/check.v1"
 )
 
+func (s *Suite) Test_LoadMk(c *check.C) {
+	t := s.Init(c)
+
+	t.Chdir(".")
+	t.CreateFileLines("filename.mk",
+		"# line 1 \\",
+		"# continues in line 2")
+
+	mklines := LoadMk("filename.mk", nil, 0)
+
+	t.CheckEquals(len(mklines.mklines), 1)
+	// The '#' from line 2 is discarded in nextLogicalLine, to properly
+	// parse multi-line variable assignments that are commented out.
+	// See Test_MkLineParser_MatchVarassign, 'multi-line variable'.
+	t.CheckEquals(mklines.mklines[0].Text, "# line 1  continues in line 2")
+}
+
 func (s *Suite) Test_Load(c *check.C) {
 	t := s.Init(c)
 
diff --git a/pkgtools/pkglint/files/intqa/qa.go b/pkgtools/pkglint/files/intqa/qa.go
index 766e0b38a4e..83e058b474d 100644
--- a/pkgtools/pkglint/files/intqa/qa.go
+++ b/pkgtools/pkglint/files/intqa/qa.go
@@ -21,25 +21,27 @@ const (
 	ENone Error = iota + 1
 	EAll
 
-	// A function or method does not have a corresponding test.
+	// EMissingTest complains if a function or method does not have a
+	// corresponding test.
 	EMissingTest
 
-	// The name of a test function does not correspond to a program
-	// element to be tested.
+	// EMissingTestee complains if the name of a test function does not
+	// correspond to a program element to be tested.
 	EMissingTestee
 
-	// The tests are not in the same order as their corresponding
-	// testees in the main code.
+	// EOrder complains if the tests are not in the same order as their
+	// corresponding testees in the main code.
 	EOrder
 
-	// The test method does not have a valid name.
+	// EName complains if the test method does not have a valid name.
 	EName
 
-	// The file of the test method does not correspond to the
-	// file of the testee.
+	// EFile complains if the file of the test method does not correspond
+	// to the file of the testee.
 	EFile
 
-	// All methods of a type must be in the same file as the type definition.
+	// EMethodsSameFile complains if a method of a type is in a different
+	// file than its corresponding type definition.
 	EMethodsSameFile
 )
 
diff --git a/pkgtools/pkglint/files/licenses.go b/pkgtools/pkglint/files/licenses.go
index dd2a79c65c1..4f014531fcb 100644
--- a/pkgtools/pkglint/files/licenses.go
+++ b/pkgtools/pkglint/files/licenses.go
@@ -23,6 +23,22 @@ func (lc *LicenseChecker) Check(value string, op MkOperator) {
 	cond.Walk(lc.checkNode)
 }
 
+func (lc *LicenseChecker) checkNode(cond *licenses.Condition) {
+	if name := cond.Name; name != "" && name != "append-placeholder" {
+		lc.checkName(name)
+		return
+	}
+
+	if cond.And && cond.Or {
+		lc.MkLine.Errorf("AND and OR operators in license conditions can only be combined using parentheses.")
+		lc.MkLine.Explain(
+			"Examples for valid license conditions are:",
+			"",
+			"\tlicense1 AND license2 AND (license3 OR license4)",
+			"\t(((license1 OR license2) AND (license3 OR license4)))")
+	}
+}
+
 func (lc *LicenseChecker) checkName(license string) {
 	licenseFile := NewCurrPath("")
 	pkg := lc.MkLines.pkg
@@ -54,19 +70,3 @@ func (lc *LicenseChecker) checkName(license string) {
 				seeGuide("Handling licenses", "handling-licenses")))
 	}
 }
-
-func (lc *LicenseChecker) checkNode(cond *licenses.Condition) {
-	if name := cond.Name; name != "" && name != "append-placeholder" {
-		lc.checkName(name)
-		return
-	}
-
-	if cond.And && cond.Or {
-		lc.MkLine.Errorf("AND and OR operators in license conditions can only be combined using parentheses.")
-		lc.MkLine.Explain(
-			"Examples for valid license conditions are:",
-			"",
-			"\tlicense1 AND license2 AND (license3 OR license4)",
-			"\t(((license1 OR license2) AND (license3 OR license4)))")
-	}
-}
diff --git a/pkgtools/pkglint/files/licenses_test.go b/pkgtools/pkglint/files/licenses_test.go
index 4fa8f20a7d3..be7263a4ca5 100644
--- a/pkgtools/pkglint/files/licenses_test.go
+++ b/pkgtools/pkglint/files/licenses_test.go
@@ -15,7 +15,8 @@ func (s *Suite) Test_LicenseChecker_Check(c *check.C) {
 			"LICENSE=\t"+licenseValue)
 
 		mklines.ForEach(func(mkline *MkLine) {
-			(&LicenseChecker{mklines, mkline}).Check(mkline.Value(), opAssign)
+			ck := LicenseChecker{mklines, mkline}
+			ck.Check(mkline.Value(), mkline.Op())
 		})
 
 		t.CheckOutput(diagnostics)
@@ -49,6 +50,31 @@ func (s *Suite) Test_LicenseChecker_Check(c *check.C) {
 		nil...)
 }
 
+func (s *Suite) Test_LicenseChecker_checkNode(c *check.C) {
+	t := s.Init(c)
+
+	t.CreateFileLines("licenses/gnu-gpl-v2",
+		"The licenses for most software are designed to take away ...")
+
+	test := func(assignment string, diagnostics ...string) {
+		mklines := t.SetUpFileMkLines("Makefile",
+			assignment)
+
+		mklines.ForEach(func(mkline *MkLine) {
+			ck := LicenseChecker{mklines, mkline}
+			ck.Check(mkline.Value(), mkline.Op())
+		})
+
+		t.CheckOutput(diagnostics)
+	}
+
+	test("LICENSE=\tfirst second",
+		"ERROR: ~/Makefile:1: Parse error for license condition \"first second\".")
+
+	test("LICENSE+=\tadded",
+		"ERROR: ~/Makefile:1: Parse error for appended license condition \"added\".")
+}
+
 func (s *Suite) Test_LicenseChecker_checkName__LICENSE_FILE(c *check.C) {
 	t := s.Init(c)
 
diff --git a/pkgtools/pkglint/files/line_test.go b/pkgtools/pkglint/files/line_test.go
index fb18d6657b0..a3e90c88913 100644
--- a/pkgtools/pkglint/files/line_test.go
+++ b/pkgtools/pkglint/files/line_test.go
@@ -2,14 +2,105 @@ package pkglint
 
 import (
 	"gopkg.in/check.v1"
+	"netbsd.org/pkglint/regex"
 )
 
+func (s *Suite) Test_RawLine_Orig(c *check.C) {
+	t := s.Init(c)
+
+	line := t.NewLine("filename", 123, "text")
+
+	t.CheckEquals(line.raw[0].orignl, "text\n")
+	t.CheckEquals(line.raw[0].Orig(), "text")
+}
+
+func (s *Suite) Test_NewLocation(c *check.C) {
+	t := s.Init(c)
+
+	loc := NewLocation("subdir/filename", 123)
+
+	t.CheckEquals(loc.Filename, NewCurrPathString("subdir/filename"))
+	t.CheckEquals(loc.lineno, 123)
+}
+
+func (s *Suite) Test_Location_Lineno(c *check.C) {
+	t := s.Init(c)
+
+	loc := NewLocation("subdir/filename", 123)
+
+	t.CheckEquals(loc.Lineno(0), 123)
+}
+
+func (s *Suite) Test_Location_File(c *check.C) {
+	t := s.Init(c)
+
+	loc := NewLocation("subdir/filename", 123)
+
+	t.CheckEquals(loc.File("other"), NewCurrPathString("subdir/other"))
+}
+
 func (s *Suite) Test_NewLine__assertion(c *check.C) {
 	t := s.Init(c)
 
 	t.ExpectAssert(func() { NewLine("filename", 123, "text", nil) })
 }
 
+func (s *Suite) Test_NewLineMulti(c *check.C) {
+	t := s.Init(c)
+
+	line := NewLineMulti("subdir/filename", 123, "", []*RawLine{nil, nil, nil})
+
+	t.CheckEquals(line.Filename(), NewCurrPathString("subdir/filename"))
+	t.CheckEquals(line.Linenos(), "123--125")
+}
+
+func (s *Suite) Test_NewLineEOF(c *check.C) {
+	t := s.Init(c)
+
+	line := NewLineEOF("subdir/filename")
+
+	t.CheckEquals(line.Filename(), NewCurrPathString("subdir/filename"))
+	t.CheckEquals(line.Linenos(), "EOF")
+}
+
+func (s *Suite) Test_NewLineWhole(c *check.C) {
+	t := s.Init(c)
+
+	line := NewLineWhole("subdir/filename")
+
+	t.CheckEquals(line.Filename(), NewCurrPathString("subdir/filename"))
+	t.CheckEquals(line.Linenos(), "")
+}
+
+func (s *Suite) Test_Line_Filename(c *check.C) {
+	t := s.Init(c)
+
+	line := t.NewLine("subdir/filename", 123, "")
+
+	t.CheckEquals(line.Filename(), NewCurrPathString("subdir/filename"))
+}
+
+func (s *Suite) Test_Line_File(c *check.C) {
+	t := s.Init(c)
+
+	line := t.NewLine("subdir/filename", 123, "")
+
+	t.CheckEquals(line.File("subsub/nested"),
+		NewCurrPathString("subdir/subsub/nested"))
+}
+
+func (s *Suite) Test_Line_Linenos(c *check.C) {
+	t := s.Init(c)
+
+	single := t.NewLine("filename", 123, "")
+	whole := NewLineWhole("filename")
+	multi := NewLineMulti("filename", 123, "text", []*RawLine{nil, nil, nil})
+
+	t.CheckEquals(single.Linenos(), "123")
+	t.CheckEquals(whole.Linenos(), "")
+	t.CheckEquals(multi.Linenos(), "123--125")
+}
+
 func (s *Suite) Test_Line_RelLine__assertion(c *check.C) {
 	t := s.Init(c)
 
@@ -28,13 +119,148 @@ func (s *Suite) Test_Line_RelLocation__assertion(c *check.C) {
 	t.ExpectAssert(func() { line.RelLocation(whole.Location) })
 }
 
+func (s *Suite) Test_Line_Rel(c *check.C) {
+	t := s.Init(c)
+
+	t.Chdir(".")
+	line1 := t.NewLine("subdir/filename", 123, "from")
+
+	rel := line1.Rel("other/filename")
+
+	t.CheckEquals(rel, NewRelPathString("../other/filename"))
+}
+
 func (s *Suite) Test_Line_IsMultiline(c *check.C) {
 	t := s.Init(c)
 
 	t.CheckEquals(t.NewLine("filename", 123, "text").IsMultiline(), false)
+
 	t.CheckEquals(NewLineEOF("filename").IsMultiline(), false)
 
-	t.CheckEquals(NewLineMulti("filename", 123, "text", []*RawLine{nil, nil, nil}).IsMultiline(), true)
+	multi := NewLineMulti("filename", 123, "text", []*RawLine{nil, nil, nil})
+	t.CheckEquals(multi.IsMultiline(), true)
+}
+
+func (s *Suite) Test_Line_RawText(c *check.C) {
+	t := s.Init(c)
+
+	t.SetUpCommandLine("--show-autofix")
+	line := t.NewLine("filename", 123, "text")
+
+	t.CheckEquals(line.RawText(0), "text")
+
+	fix := line.Autofix()
+	fix.Notef("Replacing.")
+	fix.Replace("text", "replaced")
+	fix.Apply()
+
+	t.CheckEquals(line.RawText(0), "replaced")
+
+	t.CheckOutputLines(
+		"NOTE: filename:123: Replacing.",
+		"AUTOFIX: filename:123: Replacing \"text\" with \"replaced\".")
+}
+
+func (s *Suite) Test_Line_IsCvsID(c *check.C) {
+	t := s.Init(c)
+
+	test := func(text string, prefix regex.Pattern, expectedID bool, expectedExpanded bool) {
+		line := t.NewLine("filename", 123, text)
+
+		id, expanded := line.IsCvsID(prefix)
+
+		t.CheckEquals(id, expectedID)
+		t.CheckEquals(expanded, expectedExpanded)
+	}
+
+	test(CvsID, ``, true, false)
+
+	test("$"+"NetBSD: ... $", ``, true, true)
+}
+
+func (s *Suite) Test_Line_Errorf(c *check.C) {
+	t := s.Init(c)
+
+	line := t.NewLine("filename", 123, "text")
+
+	line.Errorf("For your information.")
+
+	t.CheckOutputLines(
+		"ERROR: filename:123: For your information.")
+}
+
+func (s *Suite) Test_Line_Warnf(c *check.C) {
+	t := s.Init(c)
+
+	line := t.NewLine("filename", 123, "text")
+
+	line.Warnf("For your information.")
+
+	t.CheckOutputLines(
+		"WARN: filename:123: For your information.")
+}
+
+func (s *Suite) Test_Line_Notef(c *check.C) {
+	t := s.Init(c)
+
+	line := t.NewLine("filename", 123, "text")
+
+	line.Notef("For your information.")
+
+	t.CheckOutputLines(
+		"NOTE: filename:123: For your information.")
+}
+
+func (s *Suite) Test_Line_Explain(c *check.C) {
+	t := s.Init(c)
+
+	t.SetUpCommandLine("--explain")
+	line := t.NewLine("filename", 123, "text")
+
+	line.Notef("For your information.")
+	line.Explain(
+		"First line",
+		"continues.")
+
+	t.CheckOutputLines(
+		"NOTE: filename:123: For your information.",
+		"",
+		"\tFirst line continues.",
+		"")
+}
+
+func (s *Suite) Test_Line_Explain__without_diagnostic(c *check.C) {
+	t := s.Init(c)
+
+	t.SetUpCommandLine("--explain")
+	line := t.NewLine("filename", 123, "text")
+
+	// It is unusual to have an explanation without any preceding
+	// diagnostic.
+	line.Explain(
+		"First line",
+		"continues.")
+
+	// There is no empty line above the explanation since that is the
+	// job of the SeparatorWriter, which only steps in if there is a
+	// diagnostic above the explanation.
+	t.CheckOutputLines(
+		"\tFirst line continues.",
+		"")
+}
+
+func (s *Suite) Test_Line_String(c *check.C) {
+	t := s.Init(c)
+
+	line := t.NewLine("filename", 123, "text")
+	t.CheckEquals(line.String(), "filename:123: text")
+
+	// Since Line.String is only used for debugging purposes, trailing
+	// whitespace is OK.
+	t.CheckEquals(NewLineEOF("filename").String(), "filename:EOF: ")
+
+	multi := NewLineMulti("filename", 123, "text", []*RawLine{nil, nil, nil})
+	t.CheckEquals(multi.String(), "filename:123--125: text")
 }
 
 func (s *Suite) Test_Line_Autofix__reuse_incomplete(c *check.C) {
diff --git a/pkgtools/pkglint/files/linechecker_test.go b/pkgtools/pkglint/files/linechecker_test.go
index fa14c4e497d..f9c00011622 100644
--- a/pkgtools/pkglint/files/linechecker_test.go
+++ b/pkgtools/pkglint/files/linechecker_test.go
@@ -17,6 +17,20 @@ func (s *Suite) Test_LineChecker_CheckLength(c *check.C) {
 		"WARN: DESCR:1: Line too long (should be no more than 20 characters).")
 }
 
+func (s *Suite) Test_LineChecker_CheckValidCharacters(c *check.C) {
+	t := s.Init(c)
+
+	doTest := func(autofix bool) {
+		line := t.NewLine("filename", 32, "The letter \u00DC is an umlaut.")
+
+		LineChecker{line}.CheckValidCharacters()
+	}
+
+	t.ExpectDiagnosticsAutofix(
+		doTest,
+		"WARN: filename:32: Line contains invalid characters (U+00DC).")
+}
+
 func (s *Suite) Test_LineChecker_CheckTrailingWhitespace(c *check.C) {
 	t := s.Init(c)
 
diff --git a/pkgtools/pkglint/files/lines_test.go b/pkgtools/pkglint/files/lines_test.go
index 42baed61c1f..4264708db36 100644
--- a/pkgtools/pkglint/files/lines_test.go
+++ b/pkgtools/pkglint/files/lines_test.go
@@ -2,6 +2,83 @@ package pkglint
 
 import "gopkg.in/check.v1"
 
+func (s *Suite) Test_NewLines(c *check.C) {
+	t := s.Init(c)
+
+	lines := t.NewLines("filename",
+		"text")
+
+	t.CheckEquals(lines.Filename, NewCurrPathString("filename"))
+}
+
+func (s *Suite) Test_Lines_Len(c *check.C) {
+	t := s.Init(c)
+
+	lines := t.NewLines("filename",
+		"one",
+		"two",
+		"three")
+
+	t.CheckEquals(lines.Len(), 3)
+}
+
+func (s *Suite) Test_Lines_LastLine(c *check.C) {
+	t := s.Init(c)
+
+	lines := t.NewLines("filename",
+		"text")
+
+	whole := lines.LastLine()
+
+	t.CheckEquals(whole.String(), "filename:1: text")
+}
+
+func (s *Suite) Test_Lines_EOFLine(c *check.C) {
+	t := s.Init(c)
+
+	lines := t.NewLines("filename",
+		"text")
+
+	whole := lines.EOFLine()
+
+	// The text of the line after the ': ' is empty.
+	t.CheckEquals(whole.String(), "filename:EOF: ")
+}
+
+func (s *Suite) Test_Lines_Whole(c *check.C) {
+	t := s.Init(c)
+
+	lines := t.NewLines("filename",
+		"text")
+
+	whole := lines.Whole()
+
+	// The lineno between the '::' is empty.
+	// The text of the line after the ': ' is empty as well.
+	t.CheckEquals(whole.String(), "filename:: ")
+}
+
+func (s *Suite) Test_Lines_SaveAutofixChanges(c *check.C) {
+	t := s.Init(c)
+
+	doTest := func(autofix bool) {
+		lines := t.SetUpFileLines("filename",
+			"before")
+
+		fix := lines.Lines[0].Autofix()
+		fix.Notef("Replacing.")
+		fix.Replace("before", "after")
+		fix.Apply()
+
+		lines.SaveAutofixChanges()
+	}
+
+	t.ExpectDiagnosticsAutofix(
+		doTest,
+		"NOTE: ~/filename:1: Replacing.",
+		"AUTOFIX: ~/filename:1: Replacing \"before\" with \"after\".")
+}
+
 func (s *Suite) Test_Lines_CheckCvsID(c *check.C) {
 	t := s.Init(c)
 
diff --git a/pkgtools/pkglint/files/logging_test.go b/pkgtools/pkglint/files/logging_test.go
index 4702902f954..1a3115864a8 100644
--- a/pkgtools/pkglint/files/logging_test.go
+++ b/pkgtools/pkglint/files/logging_test.go
@@ -286,6 +286,48 @@ func (s *Suite) Test_Logger_Diag__source_duplicates(c *check.C) {
 			"category/package1", "category/package2"))
 }
 
+func (s *Suite) Test_Logger_FirstTime__not_verbose(c *check.C) {
+	t := s.Init(c)
+
+	G.Logger.verbose = false // as in a realistic run
+
+	t.CheckEquals(G.Logger.FirstTime("filename", "123", "Message."), true)
+	t.CheckEquals(G.Logger.FirstTime("filename", "123", "Message."), false)
+	t.CheckEquals(G.Logger.FirstTime("filename", "124", "Message."), true)
+	t.CheckEquals(G.Logger.FirstTime("filename", "124", "Message."), false)
+	t.CheckEquals(G.Logger.FirstTime("filename", "124", "Message."), false)
+}
+
+func (s *Suite) Test_Logger_Relevant(c *check.C) {
+	t := s.Init(c)
+
+	t.SetUpCommandLine(nil...)
+
+	t.CheckEquals(G.Logger.Relevant("Options should not contain whitespace."), true)
+	t.CheckEquals(G.Logger.suppressDiag, false)
+	t.CheckEquals(G.Logger.suppressExpl, false) // XXX: Why not true?
+
+	t.SetUpCommandLine("--only", "whitespace")
+
+	t.CheckEquals(G.Logger.Relevant("Options should not contain whitespace."), true)
+	t.CheckEquals(G.Logger.suppressDiag, false)
+	t.CheckEquals(G.Logger.suppressExpl, false) // XXX: Why not true?
+
+	t.CheckEquals(G.Logger.Relevant("Options should not contain space."), false)
+	t.CheckEquals(G.Logger.suppressDiag, true)
+	t.CheckEquals(G.Logger.suppressExpl, true)
+
+	t.SetUpCommandLine("--explain")
+
+	t.CheckEquals(G.Logger.Relevant("Options should not contain whitespace."), true)
+	t.CheckEquals(G.Logger.suppressDiag, false)
+	t.CheckEquals(G.Logger.suppressExpl, false)
+
+	t.CheckEquals(G.Logger.Relevant("Options should not contain space."), true)
+	t.CheckEquals(G.Logger.suppressDiag, false)
+	t.CheckEquals(G.Logger.suppressExpl, false)
+}
+
 func (s *Suite) Test_Logger_shallBeLogged(c *check.C) {
 	t := s.Init(c)
 
@@ -642,6 +684,61 @@ func (s *Suite) Test_Logger_writeSource__first_warn_then_autofix(c *check.C) {
 		"+\tThe last line")
 }
 
+func (s *Suite) Test_Logger_writeDiff(c *check.C) {
+	t := s.Init(c)
+
+	t.SetUpCommandLine("--show-autofix")
+	line := t.NewLine("filename", 123, "before")
+	fix := line.Autofix()
+	fix.Silent()
+	fix.Replace("before", "after")
+	fix.Apply()
+
+	G.Logger.writeDiff(line)
+
+	// The diff lines are indented with a tab so that the indentation
+	// from the actual lines is properly represented in the output.
+	// If a space had been used here instead of the tab, the output
+	// would become garbled.
+	t.CheckOutputLines(
+		"AUTOFIX: filename:123: Replacing \"before\" with \"after\".",
+		"-\tbefore",
+		"+\tafter")
+}
+
+func (s *Suite) Test_Logger_writeLine(c *check.C) {
+	t := s.Init(c)
+
+	G.Logger.writeLine("> ", "\u0007\u00FC text")
+
+	t.CheckOutputLines(
+		"> <U+0007><U+00FC> text")
+}
+
+func (s *Suite) Test_Logger_IsAutofix__default(c *check.C) {
+	t := s.Init(c)
+
+	t.SetUpCommandLine("-Wall")
+
+	t.CheckEquals(G.Logger.IsAutofix(), false)
+}
+
+func (s *Suite) Test_Logger_IsAutofix__show_autofix(c *check.C) {
+	t := s.Init(c)
+
+	t.SetUpCommandLine("-Wall", "--show-autofix")
+
+	t.CheckEquals(G.Logger.IsAutofix(), true)
+}
+
+func (s *Suite) Test_Logger_IsAutofix__autofix(c *check.C) {
+	t := s.Init(c)
+
+	t.SetUpCommandLine("-Wall", "--autofix")
+
+	t.CheckEquals(G.Logger.IsAutofix(), true)
+}
+
 // Calling Logf without further preparation just logs the message.
 // Suppressing duplicate messages or filtering messages happens
 // in other methods of the Logger, namely Relevant, FirstTime, Diag.
@@ -1162,6 +1259,58 @@ func (s *Suite) Test_SeparatorWriter(c *check.C) {
 	t.CheckEquals(sb.String(), "a\nb\n\nc\n")
 }
 
+func (s *Suite) Test_NewSeparatorWriter(c *check.C) {
+	t := s.Init(c)
+
+	var sb strings.Builder
+	wr := NewSeparatorWriter(&sb)
+
+	t.CheckEquals(wr.out, &sb)
+	t.CheckEquals(wr.state, uint8(3))
+	t.CheckEquals(wr.line.Len(), 0)
+}
+
+func (s *Suite) Test_SeparatorWriter_WriteLine(c *check.C) {
+	t := s.Init(c)
+
+	var sb strings.Builder
+	wr := NewSeparatorWriter(&sb)
+
+	wr.WriteLine("first")
+	wr.Separate()
+
+	t.CheckEquals(sb.String(), "first\n")
+
+	wr.WriteLine("second")
+
+	t.CheckEquals(sb.String(), "first\n\nsecond\n")
+}
+
+func (s *Suite) Test_SeparatorWriter_Write(c *check.C) {
+	t := s.Init(c)
+
+	var sb strings.Builder
+	wr := NewSeparatorWriter(&sb)
+
+	wr.Write("first")
+	wr.Write("")
+
+	t.CheckEquals(wr.line.String(), "first")
+
+	wr.Write("\n")
+
+	t.CheckEquals(wr.line.String(), "")
+	t.CheckEquals(sb.String(), "first\n")
+
+	wr.Separate()
+
+	t.CheckEquals(sb.String(), "first\n")
+
+	wr.WriteLine("second")
+
+	t.CheckEquals(sb.String(), "first\n\nsecond\n")
+}
+
 func (s *Suite) Test_SeparatorWriter_Separate(c *check.C) {
 	t := s.Init(c)
 
@@ -1199,6 +1348,31 @@ func (s *Suite) Test_SeparatorWriter_Separate__at_the_beginning(c *check.C) {
 	t.CheckEquals(sb.String(), "a\n")
 }
 
+func (s *Suite) Test_SeparatorWriter_write(c *check.C) {
+	t := s.Init(c)
+
+	var sb strings.Builder
+	wr := NewSeparatorWriter(&sb)
+
+	t.CheckEquals(wr.state, uint8(3))
+
+	wr.write('a')
+
+	t.CheckEquals(wr.state, uint8(1))
+
+	wr.write('\n')
+
+	t.CheckEquals(wr.state, uint8(0))
+
+	wr.Separate()
+
+	t.CheckEquals(wr.state, uint8(2))
+
+	wr.write('\n')
+
+	t.CheckEquals(wr.state, uint8(3))
+}
+
 func (s *Suite) Test_SeparatorWriter_Flush(c *check.C) {
 	t := s.Init(c)
 
diff --git a/pkgtools/pkglint/files/makepat/pat_test.go b/pkgtools/pkglint/files/makepat/pat_test.go
index 543c6510575..3b9ec9ae56b 100644
--- a/pkgtools/pkglint/files/makepat/pat_test.go
+++ b/pkgtools/pkglint/files/makepat/pat_test.go
@@ -175,6 +175,7 @@ func Test_Intersect(t *testing.T) {
 		{"N-*", "N-*", "N-*", true, true},
 		{"N-9.99.*", "N-[1-9].*", "", false, true},
 		{"N-9.99.*", "N-[1-9][0-9].*", "", false, false},
+		{"*.c", "*.h", "", false, false},
 	}
 	for _, tt := range tests {
 		t.Run(tt.str, func(t *testing.T) {
diff --git a/pkgtools/pkglint/files/mklinechecker.go b/pkgtools/pkglint/files/mklinechecker.go
index 082a019549f..c52228a28e3 100644
--- a/pkgtools/pkglint/files/mklinechecker.go
+++ b/pkgtools/pkglint/files/mklinechecker.go
@@ -112,7 +112,8 @@ func (ck MkLineChecker) checkTextWrksrcDotDot(text string) {
 func (ck MkLineChecker) checkTextRpath(text string) {
 	mkline := ck.MkLine
 
-	if mkline.IsVarassign() && mkline.Varname() == "BUILDLINK_TRANSFORM" &&
+	if mkline.IsVarassign() &&
+		varnameBase(mkline.Varname()) == "BUILDLINK_TRANSFORM" &&
 		hasPrefix(mkline.Value(), "rm:") {
 
 		return
diff --git a/pkgtools/pkglint/files/mklinechecker_test.go b/pkgtools/pkglint/files/mklinechecker_test.go
index a412a2cd1b5..478eaa163b4 100644
--- a/pkgtools/pkglint/files/mklinechecker_test.go
+++ b/pkgtools/pkglint/files/mklinechecker_test.go
@@ -181,14 +181,18 @@ func (s *Suite) Test_MkLineChecker_checkTextRpath(c *check.C) {
 	t.SetUpVartypes()
 	mklines := t.NewMkLines("filename.mk",
 		MkCvsID,
-		"BUILDLINK_TRANSFORM+=\trm:-Wl,-R/usr/lib",
-		"BUILDLINK_TRANSFORM+=\trm:-Wl,-rpath,/usr/lib",
-		"BUILDLINK_TRANSFORM+=\topt:-Wl,-rpath,/usr/lib")
+		"BUILDLINK_TRANSFORM+=\t\trm:-Wl,-R/usr/lib",
+		"BUILDLINK_TRANSFORM+=\t\trm:-Wl,-rpath,/usr/lib",
+		"BUILDLINK_TRANSFORM+=\t\topt:-Wl,-rpath,/usr/lib",
+		"BUILDLINK_TRANSFORM.pkgbase+=\trm:-Wl,-R/usr/lib",
+		"BUILDLINK_TRANSFORM.pkgbase+=\trm:-Wl,-rpath,/usr/lib",
+		"BUILDLINK_TRANSFORM.pkgbase+=\topt:-Wl,-rpath,/usr/lib")
 
 	mklines.Check()
 
 	t.CheckOutputLines(
-		"WARN: filename.mk:4: Please use ${COMPILER_RPATH_FLAG} instead of \"-Wl,-rpath,\".")
+		"WARN: filename.mk:4: Please use ${COMPILER_RPATH_FLAG} instead of \"-Wl,-rpath,\".",
+		"WARN: filename.mk:7: Please use ${COMPILER_RPATH_FLAG} instead of \"-Wl,-rpath,\".")
 }
 
 func (s *Suite) Test_MkLineChecker_checkVartype__simple_type(c *check.C) {
diff --git a/pkgtools/pkglint/files/mklineparser_test.go b/pkgtools/pkglint/files/mklineparser_test.go
index ee113e4ccdc..8c7b255bc28 100644
--- a/pkgtools/pkglint/files/mklineparser_test.go
+++ b/pkgtools/pkglint/files/mklineparser_test.go
@@ -402,6 +402,9 @@ func (s *Suite) Test_MkLineParser_MatchVarassign(c *check.C) {
 		"",
 		"")
 
+	// A multi-line variable assignment that is commented out.
+	// The '#' from the continued lines are discarded since they are not
+	// part of the variable value.
 	testLine(
 		lines(
 			"#VAR=\t\t\t\\",
diff --git a/pkgtools/pkglint/files/package.go b/pkgtools/pkglint/files/package.go
index 0e922768b36..d273ee7557f 100644
--- a/pkgtools/pkglint/files/package.go
+++ b/pkgtools/pkglint/files/package.go
@@ -7,10 +7,6 @@ import (
 	"strings"
 )
 
-// TODO: What about package names that refer to other variables?
-// TODO: Allow a hyphen in the middle of a version number.
-const rePkgname = `^([\w\-.+]+)-([0-9][.0-9A-Z_a-z]*)$`
-
 // Package is the pkgsrc package that is currently checked.
 //
 // Most of the information is loaded first, and after loading the actual checks take place.
@@ -1266,7 +1262,7 @@ func (pkg *Package) determineEffectivePkgVars() {
 
 	pkg.checkPkgnameRedundant(pkgnameLine, pkgname, distname)
 
-	if pkgname == "" && distnameLine != nil && !containsVarUse(distname) && !matches(distname, rePkgname) {
+	if pkgname == "" && distnameLine != nil && !containsVarUse(distname) && !matchesPkgname(distname) {
 		distnameLine.Warnf("As DISTNAME is not a valid package name, please define the PKGNAME explicitly.")
 	}
 
@@ -1275,7 +1271,7 @@ func (pkg *Package) determineEffectivePkgVars() {
 	}
 
 	if effname != "" && !containsVarUse(effname) {
-		if m, m1, m2 := match2(effname, rePkgname); m {
+		if m, m1, m2 := matchPkgname(effname); m {
 			pkg.EffectivePkgname = effname + pkg.nbPart()
 			pkg.EffectivePkgnameLine = pkgnameLine
 			pkg.EffectivePkgbase = m1
@@ -1284,7 +1280,7 @@ func (pkg *Package) determineEffectivePkgVars() {
 	}
 
 	if pkg.EffectivePkgnameLine == nil && distname != "" && !containsVarUse(distname) {
-		if m, m1, m2 := match2(distname, rePkgname); m {
+		if m, m1, m2 := matchPkgname(distname); m {
 			pkg.EffectivePkgname = distname + pkg.nbPart()
 			pkg.EffectivePkgnameLine = distnameLine
 			pkg.EffectivePkgbase = m1
@@ -1371,7 +1367,7 @@ func (pkg *Package) checkPossibleDowngrade() {
 		defer trace.Call0()()
 	}
 
-	m, _, pkgversion := match2(pkg.EffectivePkgname, rePkgname)
+	m, _, pkgversion := matchPkgname(pkg.EffectivePkgname)
 	if !m {
 		return
 	}
@@ -1795,3 +1791,17 @@ func NewPlistContent() PlistContent {
 		make(map[RelPath]*PlistLine),
 		make(map[string]bool)}
 }
+
+// matchPkgname tests whether the string has the form of a package name that
+// does not contain any variable expressions.
+func matchPkgname(s string) (m bool, base string, version string) {
+	// TODO: Allow a hyphen in the middle of a version number.
+	return match2(s, `^([\w\-.+]+)-([0-9][.0-9A-Z_a-z]*)$`)
+}
+
+// matchPkgname tests whether the string has the form of a package name that
+// does not contain any variable expressions.
+func matchesPkgname(s string) bool {
+	m, _, _ := matchPkgname(s)
+	return m
+}
diff --git a/pkgtools/pkglint/files/pkglint_test.go b/pkgtools/pkglint/files/pkglint_test.go
index f73c397b698..4983af4b02e 100644
--- a/pkgtools/pkglint/files/pkglint_test.go
+++ b/pkgtools/pkglint/files/pkglint_test.go
@@ -515,7 +515,6 @@ func (s *Suite) Test_Pkglint_Check__invalid_files_before_import(c *check.C) {
 	t.CheckOutputLines(
 		"ERROR: ~/category/package/Makefile.orig: Must be cleaned up before committing the package.",
 		"ERROR: ~/category/package/Makefile.rej: Must be cleaned up before committing the package.",
-		"ERROR: ~/category/package/Makefile~: Must be cleaned up before committing the package.",
 		"ERROR: ~/category/package/work: Must be cleaned up before committing the package.")
 }
 
@@ -1117,9 +1116,11 @@ func (s *Suite) Test_Pkglint_checkReg__unknown_file_in_patches(c *check.C) {
 			"Patch files should be named \"patch-\", followed by letters, '-', '_', '.', and digits only.")
 }
 
-func (s *Suite) Test_Pkglint_checkReg__patch_for_Makefile_fragment(c *check.C) {
+func (s *Suite) Test_Pkglint_checkReg__patch_for_makefile_fragment(c *check.C) {
 	t := s.Init(c)
 
+	// This is a patch file, and even though its name ends with ".mk", it must
+	// not be interpreted as a makefile fragment.
 	t.CreateFileDummyPatch("category/package/patches/patch-compiler.mk")
 	t.Chdir("category/package")
 
@@ -1197,6 +1198,25 @@ func (s *Suite) Test_Pkglint_checkReg__wip_commit_message(c *check.C) {
 	t.CheckOutputEmpty()
 }
 
+func (s *Suite) Test_Pkglint_checkReg__file_ignored_by_CVS(c *check.C) {
+	t := s.Init(c)
+
+	t.SetUpPackage("category/package")
+	t.Chdir("category/package")
+	t.CreateFileLines("PLIST",
+		PlistCvsID,
+		"bin/program")
+	t.CreateFileLines("PLIST.~1.7.~",
+		PlistCvsID,
+		"bin/program")
+	t.FinishSetUp()
+
+	G.Check(".")
+
+	// Files ending in "~" should be ignored since CVS ignores them as well.
+	t.CheckOutputEmpty()
+}
+
 func (s *Suite) Test_Pkglint_checkRegCvsSubst(c *check.C) {
 	t := s.Init(c)
 
diff --git a/pkgtools/pkglint/files/pkgsrc.go b/pkgtools/pkglint/files/pkgsrc.go
index cbd3bb73e96..e131318fc23 100644
--- a/pkgtools/pkglint/files/pkgsrc.go
+++ b/pkgtools/pkglint/files/pkgsrc.go
@@ -471,7 +471,7 @@ func (src *Pkgsrc) parseSuggestedUpdates(lines *Lines) []SuggestedUpdate {
 		llex.Skip()
 
 		if m, pkgname, comment := match2(text, `^\to[\t ]([^\t ]+)(?:[\t ]*(.+))?$`); m {
-			if m, pkgbase, pkgversion := match2(pkgname, rePkgname); m {
+			if m, pkgbase, pkgversion := matchPkgname(pkgname); m {
 				if hasPrefix(comment, "[") && hasSuffix(comment, "]") {
 					comment = comment[1 : len(comment)-1]
 				}
diff --git a/pkgtools/pkglint/files/pkgver/vercmp_test.go b/pkgtools/pkglint/files/pkgver/vercmp_test.go
index a3ecd8066c4..43ac7dfce0d 100644
--- a/pkgtools/pkglint/files/pkgver/vercmp_test.go
+++ b/pkgtools/pkglint/files/pkgver/vercmp_test.go
@@ -35,6 +35,8 @@ func (s *Suite) Test_Compare(c *check.C) {
 		{"5.0"},
 		{"5.0nb5"},
 		{"5.5", "5.005"},
+		{"2021.06.17", "2021.6.17"},
+		{"2021.12.01", "2021.12.1"},
 		{"20151110"},
 	}
 
diff --git a/pkgtools/pkglint/files/util.go b/pkgtools/pkglint/files/util.go
index 478dc1ff302..ca24e48f3c3 100644
--- a/pkgtools/pkglint/files/util.go
+++ b/pkgtools/pkglint/files/util.go
@@ -341,7 +341,9 @@ func isIgnoredFilename(filename string) bool {
 	case "CVS", ".svn", ".git", ".hg", ".idea":
 		return true
 	}
-	return hasPrefix(filename, ".#")
+
+	// https://www.gnu.org/software/trans-coord/manual/cvs/cvs.html#cvsignore
+	return hasPrefix(filename, ".#") || hasSuffix(filename, "~")
 }
 
 // Checks whether a file is already committed to the CVS repository.
diff --git a/pkgtools/pkglint/files/util_test.go b/pkgtools/pkglint/files/util_test.go
index 812d419ad3b..53c4ee8e26e 100644
--- a/pkgtools/pkglint/files/util_test.go
+++ b/pkgtools/pkglint/files/util_test.go
@@ -214,6 +214,12 @@ func (s *Suite) Test_isIgnoredFilename(c *check.C) {
 	// There is actually an IDEA plugin for pkgsrc.
 	// See https://github.com/rillig/intellij-pkgsrc.
 	test(".idea", true)
+
+	// After editing a file, run 'cvs up -CA'.  This creates a backup.
+	test(".#Makefile.1.689", true)
+
+	// https://www.gnu.org/software/trans-coord/manual/cvs/cvs.html#cvsignore
+	test("PLIST.~1.7.~", true)
 }
 
 func (s *Suite) Test_isLocallyModified(c *check.C) {
diff --git a/pkgtools/pkglint/files/vartypecheck.go b/pkgtools/pkglint/files/vartypecheck.go
index ad6c7d05446..393bf744919 100644
--- a/pkgtools/pkglint/files/vartypecheck.go
+++ b/pkgtools/pkglint/files/vartypecheck.go
@@ -1054,7 +1054,7 @@ func (cv *VartypeCheck) Perms() {
 func (cv *VartypeCheck) Pkgname() {
 	value := cv.Value
 
-	if cv.Op != opUseMatch && value == cv.ValueNoVar && !matches(value, rePkgname) {
+	if cv.Op != opUseMatch && value == cv.ValueNoVar && !matchesPkgname(value) {
 		cv.Warnf("%q is not a valid package name.", value)
 		cv.Explain(
 			"A valid package name has the form packagename-version, where version",