178 lines
6.8 KiB
Diff
178 lines
6.8 KiB
Diff
From 09581ca4826b6d67b1c3a3c8597038b28a37f52d Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Jakub=20=C4=8Cajka?= <jcajka@redhat.com>
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Date: Fri, 5 Jan 2018 13:38:55 +0100
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Subject: [PATCH] cmd/go/internal/work : improve pkgconfig support to work with
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latest(1.4+) pkgconf
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Fixes #23373
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Fix interfacing with latest(1.4+) pkgconf versions, as they have change the output format, by extending parsing function splitPkgConfigOutput to accommodate more possible fragment escaping formats. Function is based on pkgconfigs own implementation at https://github.com/pkgconf/pkgconf/blob/master/libpkgconf/argvsplit.c. Along with this change test case TestSplitPkgConfigOutput have been expanded. Thanks to ignatenko for help on test cases and insights in to the pkgconfig.
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Change-Id: I55301bb564b07128d5564ec1454dd247f84a95c3
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---
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src/cmd/go/internal/work/build_test.go | 44 +++++++++++++++++---
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src/cmd/go/internal/work/exec.go | 75 +++++++++++++++++++++++-----------
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2 files changed, 90 insertions(+), 29 deletions(-)
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diff --git a/src/cmd/go/internal/work/build_test.go b/src/cmd/go/internal/work/build_test.go
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index 3f5ba37c64..c3c63a97a4 100644
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--- a/src/cmd/go/internal/work/build_test.go
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+++ b/src/cmd/go/internal/work/build_test.go
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@@ -39,14 +39,46 @@ func TestSplitPkgConfigOutput(t *testing.T) {
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for _, test := range []struct {
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in []byte
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want []string
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+ pass bool
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}{
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- {[]byte(`-r:foo -L/usr/white\ space/lib -lfoo\ bar -lbar\ baz`), []string{"-r:foo", "-L/usr/white space/lib", "-lfoo bar", "-lbar baz"}},
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- {[]byte(`-lextra\ fun\ arg\\`), []string{`-lextra fun arg\`}},
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- {[]byte(`broken flag\`), []string{"broken", "flag"}},
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- {[]byte("\textra whitespace\r\n"), []string{"extra", "whitespace"}},
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- {[]byte(" \r\n "), nil},
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+ {[]byte(`-r:foo -L/usr/white\ space/lib -lfoo\ bar -lbar\ baz`), []string{"-r:foo", "-L/usr/white space/lib", "-lfoo bar", "-lbar baz"}, true},
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+ {[]byte(`-lextra\ fun\ arg\\`), []string{`-lextra fun arg\`}, true},
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+ {[]byte(`broken flag\`), []string{"broken", "flag"}, true},
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+ {[]byte(`extra broken flag \`), []string{"extra", "broken", "flag"}, true},
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+ {[]byte(`\`), nil, true},
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+ {[]byte("\textra whitespace\r\n"), []string{"extra", "whitespace"}, true},
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+ {[]byte(" \r\n "), nil, true},
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+ {[]byte(`"-r:foo" "-L/usr/white space/lib" "-lfoo bar" "-lbar baz"`), []string{"-r:foo", "-L/usr/white space/lib", "-lfoo bar", "-lbar baz"}, true},
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+ {[]byte(`"-lextra fun arg\\"`), []string{`-lextra fun arg\`}, true},
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+ {[]byte(`" \r\n\ "`), []string{` \r\n\ `}, true},
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+ {[]byte(`""`), nil, true},
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+ {[]byte(``), nil, true},
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+ {[]byte(`"\\"`), []string{`\`}, true},
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+ {[]byte(`"\x"`), []string{`\x`}, true},
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+ {[]byte(`"\\x"`), []string{`\x`}, true},
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+ {[]byte(`'\\'`), []string{`\`}, true},
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+ {[]byte(`'\x'`), []string{`\x`}, true},
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+ {[]byte(`"\\x"`), []string{`\x`}, true},
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+ {[]byte(`-fPIC -I/test/include/foo -DQUOTED='"/test/share/doc"'`), []string{"-fPIC", "-I/test/include/foo", `-DQUOTED="/test/share/doc"`}, true},
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+ {[]byte(`-fPIC -I/test/include/foo -DQUOTED="/test/share/doc"`), []string{"-fPIC", "-I/test/include/foo", "-DQUOTED=/test/share/doc"}, true},
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+ {[]byte(`-fPIC -I/test/include/foo -DQUOTED=\"/test/share/doc\"`), []string{"-fPIC", "-I/test/include/foo", `-DQUOTED="/test/share/doc"`}, true},
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+ {[]byte(`-fPIC -I/test/include/foo -DQUOTED='/test/share/doc'`), []string{"-fPIC", "-I/test/include/foo", "-DQUOTED=/test/share/doc"}, true},
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+ {[]byte(`-DQUOTED='/te\st/share/d\oc'`), []string{`-DQUOTED=/te\st/share/d\oc`}, true},
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+ {[]byte(`-Dhello=10 -Dworld=+32 -DDEFINED_FROM_PKG_CONFIG=hello\ world`), []string{"-Dhello=10", "-Dworld=+32", "-DDEFINED_FROM_PKG_CONFIG=hello world"}, true},
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+ {[]byte(`" \r\n `), nil, false},
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+ {[]byte(`"-r:foo" "-L/usr/white space/lib "-lfoo bar" "-lbar baz"`), nil, false},
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+ {[]byte(`"-lextra fun arg\\`), nil, false},
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} {
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- got := splitPkgConfigOutput(test.in)
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+ got, err := splitPkgConfigOutput(test.in)
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+ if err != nil {
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+ if test.pass {
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+ t.Errorf("splitPkgConfigOutput(%v) = %v; function returned error %v", test.in, got, err)
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+ }
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+ if got != nil {
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+ t.Errorf("splitPkgConfigOutput failed with error %v and output has been non nil %v", err, got)
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+ }
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+ continue
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+ }
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if !reflect.DeepEqual(got, test.want) {
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t.Errorf("splitPkgConfigOutput(%v) = %v; want %v", test.in, got, test.want)
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}
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diff --git a/src/cmd/go/internal/work/exec.go b/src/cmd/go/internal/work/exec.go
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index a5ab75f6a8..8774be1385 100644
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--- a/src/cmd/go/internal/work/exec.go
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+++ b/src/cmd/go/internal/work/exec.go
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@@ -900,36 +900,62 @@ func (b *Builder) PkgconfigCmd() string {
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}
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// splitPkgConfigOutput parses the pkg-config output into a slice of
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-// flags. pkg-config always uses \ to escape special characters.
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-func splitPkgConfigOutput(out []byte) []string {
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+// flags. This implements the algorithm from pkgconf/libpkgconf/argvsplit.c
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+func splitPkgConfigOutput(out []byte) ([]string, error) {
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if len(out) == 0 {
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- return nil
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+ return nil, nil
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}
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var flags []string
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- flag := make([]byte, len(out))
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- r, w := 0, 0
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- for r < len(out) {
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- switch out[r] {
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- case ' ', '\t', '\r', '\n':
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- if w > 0 {
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- flags = append(flags, string(flag[:w]))
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+ flag := make([]byte, 0, len(out))
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+ escaped := false
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+ quote := byte(0)
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+
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+ for _, c := range out {
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+ if escaped {
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+ if quote == '"' || quote == '\'' {
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+ switch c {
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+ case '$', '`', '"', '\\':
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+ default:
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+ flag = append(flag, '\\')
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+ }
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+ flag = append(flag, c)
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+ } else {
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+ flag = append(flag, c)
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}
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- w = 0
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- case '\\':
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- r++
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- fallthrough
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- default:
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- if r < len(out) {
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- flag[w] = out[r]
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- w++
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+ escaped = false
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+ } else if quote != 0 {
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+ if c == quote {
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+ quote = 0
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+ } else {
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+ switch c {
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+ case '\\':
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+ escaped = true
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+ default:
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+ flag = append(flag, c)
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+ }
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}
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+ } else if strings.IndexByte(" \t\n\v\f\r", c) < 0 {
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+ switch c {
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+ case '\\':
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+ escaped = true
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+ case '\'', '"':
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+ quote = c
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+ default:
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+ flag = append(flag, c)
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+ }
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+ } else if len(flag) != 0 {
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+ flags = append(flags, string(flag))
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+ flag = flag[:0]
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}
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- r++
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}
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- if w > 0 {
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- flags = append(flags, string(flag[:w]))
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+
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+ if quote != 0 {
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+ return nil, errors.New("unterminated quoted string in pkgconf output ")
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+ } else if len(flag) != 0 {
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+ flags = append(flags, string(flag))
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}
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- return flags
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+
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+ return flags, nil
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}
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// Calls pkg-config if needed and returns the cflags/ldflags needed to build the package.
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@@ -948,7 +974,10 @@ func (b *Builder) getPkgConfigFlags(p *load.Package) (cflags, ldflags []string,
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return nil, nil, errPrintedOutput
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}
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if len(out) > 0 {
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- cflags = splitPkgConfigOutput(out)
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+ cflags, err = splitPkgConfigOutput(out)
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+ if err != nil {
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+ return nil, nil, err
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+ }
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if err := checkCompilerFlags("CFLAGS", "pkg-config --cflags", cflags); err != nil {
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return nil, nil, err
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}
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--
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2.14.3
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