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177 lines
6.8 KiB
177 lines
6.8 KiB
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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