diff options
Diffstat (limited to 'gcc-4.8.1/libgo/go/go/build/build.go')
| -rw-r--r-- | gcc-4.8.1/libgo/go/go/build/build.go | 1043 |
1 files changed, 0 insertions, 1043 deletions
diff --git a/gcc-4.8.1/libgo/go/go/build/build.go b/gcc-4.8.1/libgo/go/go/build/build.go deleted file mode 100644 index e2a47a556..000000000 --- a/gcc-4.8.1/libgo/go/go/build/build.go +++ /dev/null @@ -1,1043 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package build - -import ( - "bytes" - "errors" - "fmt" - "go/ast" - "go/doc" - "go/parser" - "go/token" - "io" - "io/ioutil" - "log" - "os" - pathpkg "path" - "path/filepath" - "runtime" - "sort" - "strconv" - "strings" - "unicode" -) - -// A Context specifies the supporting context for a build. -type Context struct { - GOARCH string // target architecture - GOOS string // target operating system - GOROOT string // Go root - GOPATH string // Go path - CgoEnabled bool // whether cgo can be used - BuildTags []string // additional tags to recognize in +build lines - InstallTag string // package install directory suffix - UseAllFiles bool // use files regardless of +build lines, file names - Compiler string // compiler to assume when computing target paths - - // By default, Import uses the operating system's file system calls - // to read directories and files. To read from other sources, - // callers can set the following functions. They all have default - // behaviors that use the local file system, so clients need only set - // the functions whose behaviors they wish to change. - - // JoinPath joins the sequence of path fragments into a single path. - // If JoinPath is nil, Import uses filepath.Join. - JoinPath func(elem ...string) string - - // SplitPathList splits the path list into a slice of individual paths. - // If SplitPathList is nil, Import uses filepath.SplitList. - SplitPathList func(list string) []string - - // IsAbsPath reports whether path is an absolute path. - // If IsAbsPath is nil, Import uses filepath.IsAbs. - IsAbsPath func(path string) bool - - // IsDir reports whether the path names a directory. - // If IsDir is nil, Import calls os.Stat and uses the result's IsDir method. - IsDir func(path string) bool - - // HasSubdir reports whether dir is a subdirectory of - // (perhaps multiple levels below) root. - // If so, HasSubdir sets rel to a slash-separated path that - // can be joined to root to produce a path equivalent to dir. - // If HasSubdir is nil, Import uses an implementation built on - // filepath.EvalSymlinks. - HasSubdir func(root, dir string) (rel string, ok bool) - - // ReadDir returns a slice of os.FileInfo, sorted by Name, - // describing the content of the named directory. - // If ReadDir is nil, Import uses ioutil.ReadDir. - ReadDir func(dir string) (fi []os.FileInfo, err error) - - // OpenFile opens a file (not a directory) for reading. - // If OpenFile is nil, Import uses os.Open. - OpenFile func(path string) (r io.ReadCloser, err error) -} - -// joinPath calls ctxt.JoinPath (if not nil) or else filepath.Join. -func (ctxt *Context) joinPath(elem ...string) string { - if f := ctxt.JoinPath; f != nil { - return f(elem...) - } - return filepath.Join(elem...) -} - -// splitPathList calls ctxt.SplitPathList (if not nil) or else filepath.SplitList. -func (ctxt *Context) splitPathList(s string) []string { - if f := ctxt.SplitPathList; f != nil { - return f(s) - } - return filepath.SplitList(s) -} - -// isAbsPath calls ctxt.IsAbsSPath (if not nil) or else filepath.IsAbs. -func (ctxt *Context) isAbsPath(path string) bool { - if f := ctxt.IsAbsPath; f != nil { - return f(path) - } - return filepath.IsAbs(path) -} - -// isDir calls ctxt.IsDir (if not nil) or else uses os.Stat. -func (ctxt *Context) isDir(path string) bool { - if f := ctxt.IsDir; f != nil { - return f(path) - } - fi, err := os.Stat(path) - return err == nil && fi.IsDir() -} - -// hasSubdir calls ctxt.HasSubdir (if not nil) or else uses -// the local file system to answer the question. -func (ctxt *Context) hasSubdir(root, dir string) (rel string, ok bool) { - if f := ctxt.HasSubdir; f != nil { - return f(root, dir) - } - - if p, err := filepath.EvalSymlinks(root); err == nil { - root = p - } - if p, err := filepath.EvalSymlinks(dir); err == nil { - dir = p - } - const sep = string(filepath.Separator) - root = filepath.Clean(root) - if !strings.HasSuffix(root, sep) { - root += sep - } - dir = filepath.Clean(dir) - if !strings.HasPrefix(dir, root) { - return "", false - } - return filepath.ToSlash(dir[len(root):]), true -} - -// readDir calls ctxt.ReadDir (if not nil) or else ioutil.ReadDir. -func (ctxt *Context) readDir(path string) ([]os.FileInfo, error) { - if f := ctxt.ReadDir; f != nil { - return f(path) - } - return ioutil.ReadDir(path) -} - -// openFile calls ctxt.OpenFile (if not nil) or else os.Open. -func (ctxt *Context) openFile(path string) (io.ReadCloser, error) { - if fn := ctxt.OpenFile; fn != nil { - return fn(path) - } - - f, err := os.Open(path) - if err != nil { - return nil, err // nil interface - } - return f, nil -} - -// isFile determines whether path is a file by trying to open it. -// It reuses openFile instead of adding another function to the -// list in Context. -func (ctxt *Context) isFile(path string) bool { - f, err := ctxt.openFile(path) - if err != nil { - return false - } - f.Close() - return true -} - -// gopath returns the list of Go path directories. -func (ctxt *Context) gopath() []string { - var all []string - for _, p := range ctxt.splitPathList(ctxt.GOPATH) { - if p == "" || p == ctxt.GOROOT { - // Empty paths are uninteresting. - // If the path is the GOROOT, ignore it. - // People sometimes set GOPATH=$GOROOT, which is useless - // but would cause us to find packages with import paths - // like "pkg/math". - // Do not get confused by this common mistake. - continue - } - all = append(all, p) - } - return all -} - -// SrcDirs returns a list of package source root directories. -// It draws from the current Go root and Go path but omits directories -// that do not exist. -func (ctxt *Context) SrcDirs() []string { - var all []string - if ctxt.GOROOT != "" { - dir := ctxt.joinPath(ctxt.GOROOT, "src", "pkg") - if ctxt.isDir(dir) { - all = append(all, dir) - } - } - for _, p := range ctxt.gopath() { - dir := ctxt.joinPath(p, "src") - if ctxt.isDir(dir) { - all = append(all, dir) - } - } - return all -} - -// Default is the default Context for builds. -// It uses the GOARCH, GOOS, GOROOT, and GOPATH environment variables -// if set, or else the compiled code's GOARCH, GOOS, and GOROOT. -var Default Context = defaultContext() - -var cgoEnabled = map[string]bool{ - "darwin/386": true, - "darwin/amd64": true, - "freebsd/386": true, - "freebsd/amd64": true, - "linux/386": true, - "linux/amd64": true, - "linux/arm": true, - "netbsd/386": true, - "netbsd/amd64": true, - "openbsd/386": true, - "openbsd/amd64": true, - "windows/386": true, - "windows/amd64": true, -} - -func defaultContext() Context { - var c Context - - c.GOARCH = envOr("GOARCH", runtime.GOARCH) - c.GOOS = envOr("GOOS", runtime.GOOS) - c.GOROOT = runtime.GOROOT() - c.GOPATH = envOr("GOPATH", "") - c.Compiler = runtime.Compiler - - switch os.Getenv("CGO_ENABLED") { - case "1": - c.CgoEnabled = true - case "0": - c.CgoEnabled = false - default: - c.CgoEnabled = cgoEnabled[c.GOOS+"/"+c.GOARCH] - } - - return c -} - -func envOr(name, def string) string { - s := os.Getenv(name) - if s == "" { - return def - } - return s -} - -// An ImportMode controls the behavior of the Import method. -type ImportMode uint - -const ( - // If FindOnly is set, Import stops after locating the directory - // that should contain the sources for a package. It does not - // read any files in the directory. - FindOnly ImportMode = 1 << iota - - // If AllowBinary is set, Import can be satisfied by a compiled - // package object without corresponding sources. - AllowBinary -) - -// A Package describes the Go package found in a directory. -type Package struct { - Dir string // directory containing package sources - Name string // package name - Doc string // documentation synopsis - ImportPath string // import path of package ("" if unknown) - Root string // root of Go tree where this package lives - SrcRoot string // package source root directory ("" if unknown) - PkgRoot string // package install root directory ("" if unknown) - BinDir string // command install directory ("" if unknown) - Goroot bool // package found in Go root - PkgObj string // installed .a file - - // Source files - GoFiles []string // .go source files (excluding CgoFiles, TestGoFiles, XTestGoFiles) - CgoFiles []string // .go source files that import "C" - CFiles []string // .c source files - HFiles []string // .h source files - SFiles []string // .s source files - SysoFiles []string // .syso system object files to add to archive - SwigFiles []string // .swig files - SwigCXXFiles []string // .swigcxx files - - // Cgo directives - CgoPkgConfig []string // Cgo pkg-config directives - CgoCFLAGS []string // Cgo CFLAGS directives - CgoLDFLAGS []string // Cgo LDFLAGS directives - - // Dependency information - Imports []string // imports from GoFiles, CgoFiles - ImportPos map[string][]token.Position // line information for Imports - - // Test information - TestGoFiles []string // _test.go files in package - TestImports []string // imports from TestGoFiles - TestImportPos map[string][]token.Position // line information for TestImports - XTestGoFiles []string // _test.go files outside package - XTestImports []string // imports from XTestGoFiles - XTestImportPos map[string][]token.Position // line information for XTestImports -} - -// IsCommand reports whether the package is considered a -// command to be installed (not just a library). -// Packages named "main" are treated as commands. -func (p *Package) IsCommand() bool { - return p.Name == "main" -} - -// ImportDir is like Import but processes the Go package found in -// the named directory. -func (ctxt *Context) ImportDir(dir string, mode ImportMode) (*Package, error) { - return ctxt.Import(".", dir, mode) -} - -// NoGoError is the error used by Import to describe a directory -// containing no Go source files. -type NoGoError struct { - Dir string -} - -func (e *NoGoError) Error() string { - return "no Go source files in " + e.Dir -} - -// Import returns details about the Go package named by the import path, -// interpreting local import paths relative to the srcDir directory. -// If the path is a local import path naming a package that can be imported -// using a standard import path, the returned package will set p.ImportPath -// to that path. -// -// In the directory containing the package, .go, .c, .h, and .s files are -// considered part of the package except for: -// -// - .go files in package documentation -// - files starting with _ or . (likely editor temporary files) -// - files with build constraints not satisfied by the context -// -// If an error occurs, Import returns a non-nil error and a non-nil -// *Package containing partial information. -// -func (ctxt *Context) Import(path string, srcDir string, mode ImportMode) (*Package, error) { - p := &Package{ - ImportPath: path, - } - if path == "" { - return p, fmt.Errorf("import %q: invalid import path", path) - } - - var pkga string - var pkgerr error - switch ctxt.Compiler { - case "gccgo": - dir, elem := pathpkg.Split(p.ImportPath) - pkga = "pkg/gccgo/" + dir + "lib" + elem + ".a" - case "gc": - tag := "" - if ctxt.InstallTag != "" { - tag = "_" + ctxt.InstallTag - } - pkga = "pkg/" + ctxt.GOOS + "_" + ctxt.GOARCH + tag + "/" + p.ImportPath + ".a" - default: - // Save error for end of function. - pkgerr = fmt.Errorf("import %q: unknown compiler %q", path, ctxt.Compiler) - } - - binaryOnly := false - if IsLocalImport(path) { - pkga = "" // local imports have no installed path - if srcDir == "" { - return p, fmt.Errorf("import %q: import relative to unknown directory", path) - } - if !ctxt.isAbsPath(path) { - p.Dir = ctxt.joinPath(srcDir, path) - } - // Determine canonical import path, if any. - if ctxt.GOROOT != "" { - root := ctxt.joinPath(ctxt.GOROOT, "src", "pkg") - if sub, ok := ctxt.hasSubdir(root, p.Dir); ok { - p.Goroot = true - p.ImportPath = sub - p.Root = ctxt.GOROOT - goto Found - } - } - all := ctxt.gopath() - for i, root := range all { - rootsrc := ctxt.joinPath(root, "src") - if sub, ok := ctxt.hasSubdir(rootsrc, p.Dir); ok { - // We found a potential import path for dir, - // but check that using it wouldn't find something - // else first. - if ctxt.GOROOT != "" { - if dir := ctxt.joinPath(ctxt.GOROOT, "src", "pkg", sub); ctxt.isDir(dir) { - goto Found - } - } - for _, earlyRoot := range all[:i] { - if dir := ctxt.joinPath(earlyRoot, "src", sub); ctxt.isDir(dir) { - goto Found - } - } - - // sub would not name some other directory instead of this one. - // Record it. - p.ImportPath = sub - p.Root = root - goto Found - } - } - // It's okay that we didn't find a root containing dir. - // Keep going with the information we have. - } else { - if strings.HasPrefix(path, "/") { - return p, fmt.Errorf("import %q: cannot import absolute path", path) - } - - // tried records the location of unsucsessful package lookups - var tried struct { - goroot string - gopath []string - } - - // Determine directory from import path. - if ctxt.GOROOT != "" { - dir := ctxt.joinPath(ctxt.GOROOT, "src", "pkg", path) - isDir := ctxt.isDir(dir) - binaryOnly = !isDir && mode&AllowBinary != 0 && pkga != "" && ctxt.isFile(ctxt.joinPath(ctxt.GOROOT, pkga)) - if isDir || binaryOnly { - p.Dir = dir - p.Goroot = true - p.Root = ctxt.GOROOT - goto Found - } - tried.goroot = dir - } - for _, root := range ctxt.gopath() { - dir := ctxt.joinPath(root, "src", path) - isDir := ctxt.isDir(dir) - binaryOnly = !isDir && mode&AllowBinary != 0 && pkga != "" && ctxt.isFile(ctxt.joinPath(root, pkga)) - if isDir || binaryOnly { - p.Dir = dir - p.Root = root - goto Found - } - tried.gopath = append(tried.gopath, dir) - } - - // package was not found - var paths []string - if tried.goroot != "" { - paths = append(paths, fmt.Sprintf("\t%s (from $GOROOT)", tried.goroot)) - } else { - paths = append(paths, "\t($GOROOT not set)") - } - var i int - var format = "\t%s (from $GOPATH)" - for ; i < len(tried.gopath); i++ { - if i > 0 { - format = "\t%s" - } - paths = append(paths, fmt.Sprintf(format, tried.gopath[i])) - } - if i == 0 { - paths = append(paths, "\t($GOPATH not set)") - } - return p, fmt.Errorf("cannot find package %q in any of:\n%s", path, strings.Join(paths, "\n")) - } - -Found: - if p.Root != "" { - if p.Goroot { - p.SrcRoot = ctxt.joinPath(p.Root, "src", "pkg") - } else { - p.SrcRoot = ctxt.joinPath(p.Root, "src") - } - p.PkgRoot = ctxt.joinPath(p.Root, "pkg") - p.BinDir = ctxt.joinPath(p.Root, "bin") - if pkga != "" { - p.PkgObj = ctxt.joinPath(p.Root, pkga) - } - } - - if mode&FindOnly != 0 { - return p, pkgerr - } - if binaryOnly && (mode&AllowBinary) != 0 { - return p, pkgerr - } - - dirs, err := ctxt.readDir(p.Dir) - if err != nil { - return p, err - } - - var Sfiles []string // files with ".S" (capital S) - var firstFile string - imported := make(map[string][]token.Position) - testImported := make(map[string][]token.Position) - xTestImported := make(map[string][]token.Position) - fset := token.NewFileSet() - for _, d := range dirs { - if d.IsDir() { - continue - } - name := d.Name() - if strings.HasPrefix(name, "_") || - strings.HasPrefix(name, ".") { - continue - } - if !ctxt.UseAllFiles && !ctxt.goodOSArchFile(name) { - continue - } - - i := strings.LastIndex(name, ".") - if i < 0 { - i = len(name) - } - ext := name[i:] - switch ext { - case ".go", ".c", ".s", ".h", ".S", ".swig", ".swigcxx": - // tentatively okay - read to make sure - case ".syso": - // binary objects to add to package archive - // Likely of the form foo_windows.syso, but - // the name was vetted above with goodOSArchFile. - p.SysoFiles = append(p.SysoFiles, name) - continue - default: - // skip - continue - } - - filename := ctxt.joinPath(p.Dir, name) - f, err := ctxt.openFile(filename) - if err != nil { - return p, err - } - - var data []byte - if strings.HasSuffix(filename, ".go") { - data, err = readImports(f, false) - } else { - data, err = readComments(f) - } - f.Close() - if err != nil { - return p, fmt.Errorf("read %s: %v", filename, err) - } - - // Look for +build comments to accept or reject the file. - if !ctxt.UseAllFiles && !ctxt.shouldBuild(data) { - continue - } - - // Going to save the file. For non-Go files, can stop here. - switch ext { - case ".c": - p.CFiles = append(p.CFiles, name) - continue - case ".h": - p.HFiles = append(p.HFiles, name) - continue - case ".s": - p.SFiles = append(p.SFiles, name) - continue - case ".S": - Sfiles = append(Sfiles, name) - continue - case ".swig": - p.SwigFiles = append(p.SwigFiles, name) - continue - case ".swigcxx": - p.SwigCXXFiles = append(p.SwigCXXFiles, name) - continue - } - - pf, err := parser.ParseFile(fset, filename, data, parser.ImportsOnly|parser.ParseComments) - if err != nil { - return p, err - } - - pkg := pf.Name.Name - if pkg == "documentation" { - continue - } - - isTest := strings.HasSuffix(name, "_test.go") - isXTest := false - if isTest && strings.HasSuffix(pkg, "_test") { - isXTest = true - pkg = pkg[:len(pkg)-len("_test")] - } - - if p.Name == "" { - p.Name = pkg - firstFile = name - } else if pkg != p.Name { - return p, fmt.Errorf("found packages %s (%s) and %s (%s) in %s", p.Name, firstFile, pkg, name, p.Dir) - } - if pf.Doc != nil && p.Doc == "" { - p.Doc = doc.Synopsis(pf.Doc.Text()) - } - - // Record imports and information about cgo. - isCgo := false - for _, decl := range pf.Decls { - d, ok := decl.(*ast.GenDecl) - if !ok { - continue - } - for _, dspec := range d.Specs { - spec, ok := dspec.(*ast.ImportSpec) - if !ok { - continue - } - quoted := spec.Path.Value - path, err := strconv.Unquote(quoted) - if err != nil { - log.Panicf("%s: parser returned invalid quoted string: <%s>", filename, quoted) - } - if isXTest { - xTestImported[path] = append(xTestImported[path], fset.Position(spec.Pos())) - } else if isTest { - testImported[path] = append(testImported[path], fset.Position(spec.Pos())) - } else { - imported[path] = append(imported[path], fset.Position(spec.Pos())) - } - if path == "C" { - if isTest { - return p, fmt.Errorf("use of cgo in test %s not supported", filename) - } - cg := spec.Doc - if cg == nil && len(d.Specs) == 1 { - cg = d.Doc - } - if cg != nil { - if err := ctxt.saveCgo(filename, p, cg); err != nil { - return p, err - } - } - isCgo = true - } - } - } - if isCgo { - if ctxt.CgoEnabled { - p.CgoFiles = append(p.CgoFiles, name) - } - } else if isXTest { - p.XTestGoFiles = append(p.XTestGoFiles, name) - } else if isTest { - p.TestGoFiles = append(p.TestGoFiles, name) - } else { - p.GoFiles = append(p.GoFiles, name) - } - } - if p.Name == "" { - return p, &NoGoError{p.Dir} - } - - p.Imports, p.ImportPos = cleanImports(imported) - p.TestImports, p.TestImportPos = cleanImports(testImported) - p.XTestImports, p.XTestImportPos = cleanImports(xTestImported) - - // add the .S files only if we are using cgo - // (which means gcc will compile them). - // The standard assemblers expect .s files. - if len(p.CgoFiles) > 0 { - p.SFiles = append(p.SFiles, Sfiles...) - sort.Strings(p.SFiles) - } - - return p, pkgerr -} - -func cleanImports(m map[string][]token.Position) ([]string, map[string][]token.Position) { - all := make([]string, 0, len(m)) - for path := range m { - all = append(all, path) - } - sort.Strings(all) - return all, m -} - -// Import is shorthand for Default.Import. -func Import(path, srcDir string, mode ImportMode) (*Package, error) { - return Default.Import(path, srcDir, mode) -} - -// ImportDir is shorthand for Default.ImportDir. -func ImportDir(dir string, mode ImportMode) (*Package, error) { - return Default.ImportDir(dir, mode) -} - -var slashslash = []byte("//") - -// shouldBuild reports whether it is okay to use this file, -// The rule is that in the file's leading run of // comments -// and blank lines, which must be followed by a blank line -// (to avoid including a Go package clause doc comment), -// lines beginning with '// +build' are taken as build directives. -// -// The file is accepted only if each such line lists something -// matching the file. For example: -// -// // +build windows linux -// -// marks the file as applicable only on Windows and Linux. -// -func (ctxt *Context) shouldBuild(content []byte) bool { - // Pass 1. Identify leading run of // comments and blank lines, - // which must be followed by a blank line. - end := 0 - p := content - for len(p) > 0 { - line := p - if i := bytes.IndexByte(line, '\n'); i >= 0 { - line, p = line[:i], p[i+1:] - } else { - p = p[len(p):] - } - line = bytes.TrimSpace(line) - if len(line) == 0 { // Blank line - end = len(content) - len(p) - continue - } - if !bytes.HasPrefix(line, slashslash) { // Not comment line - break - } - } - content = content[:end] - - // Pass 2. Process each line in the run. - p = content - for len(p) > 0 { - line := p - if i := bytes.IndexByte(line, '\n'); i >= 0 { - line, p = line[:i], p[i+1:] - } else { - p = p[len(p):] - } - line = bytes.TrimSpace(line) - if bytes.HasPrefix(line, slashslash) { - line = bytes.TrimSpace(line[len(slashslash):]) - if len(line) > 0 && line[0] == '+' { - // Looks like a comment +line. - f := strings.Fields(string(line)) - if f[0] == "+build" { - ok := false - for _, tok := range f[1:] { - if ctxt.match(tok) { - ok = true - break - } - } - if !ok { - return false // this one doesn't match - } - } - } - } - } - return true // everything matches -} - -// saveCgo saves the information from the #cgo lines in the import "C" comment. -// These lines set CFLAGS and LDFLAGS and pkg-config directives that affect -// the way cgo's C code is built. -// -// TODO(rsc): This duplicates code in cgo. -// Once the dust settles, remove this code from cgo. -func (ctxt *Context) saveCgo(filename string, di *Package, cg *ast.CommentGroup) error { - text := cg.Text() - for _, line := range strings.Split(text, "\n") { - orig := line - - // Line is - // #cgo [GOOS/GOARCH...] LDFLAGS: stuff - // - line = strings.TrimSpace(line) - if len(line) < 5 || line[:4] != "#cgo" || (line[4] != ' ' && line[4] != '\t') { - continue - } - - // Split at colon. - line = strings.TrimSpace(line[4:]) - i := strings.Index(line, ":") - if i < 0 { - return fmt.Errorf("%s: invalid #cgo line: %s", filename, orig) - } - line, argstr := line[:i], line[i+1:] - - // Parse GOOS/GOARCH stuff. - f := strings.Fields(line) - if len(f) < 1 { - return fmt.Errorf("%s: invalid #cgo line: %s", filename, orig) - } - - cond, verb := f[:len(f)-1], f[len(f)-1] - if len(cond) > 0 { - ok := false - for _, c := range cond { - if ctxt.match(c) { - ok = true - break - } - } - if !ok { - continue - } - } - - args, err := splitQuoted(argstr) - if err != nil { - return fmt.Errorf("%s: invalid #cgo line: %s", filename, orig) - } - for _, arg := range args { - if !safeName(arg) { - return fmt.Errorf("%s: malformed #cgo argument: %s", filename, arg) - } - } - - switch verb { - case "CFLAGS": - di.CgoCFLAGS = append(di.CgoCFLAGS, args...) - case "LDFLAGS": - di.CgoLDFLAGS = append(di.CgoLDFLAGS, args...) - case "pkg-config": - di.CgoPkgConfig = append(di.CgoPkgConfig, args...) - default: - return fmt.Errorf("%s: invalid #cgo verb: %s", filename, orig) - } - } - return nil -} - -var safeBytes = []byte("+-.,/0123456789=ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz:") - -func safeName(s string) bool { - if s == "" { - return false - } - for i := 0; i < len(s); i++ { - if c := s[i]; c < 0x80 && bytes.IndexByte(safeBytes, c) < 0 { - return false - } - } - return true -} - -// splitQuoted splits the string s around each instance of one or more consecutive -// white space characters while taking into account quotes and escaping, and -// returns an array of substrings of s or an empty list if s contains only white space. -// Single quotes and double quotes are recognized to prevent splitting within the -// quoted region, and are removed from the resulting substrings. If a quote in s -// isn't closed err will be set and r will have the unclosed argument as the -// last element. The backslash is used for escaping. -// -// For example, the following string: -// -// a b:"c d" 'e''f' "g\"" -// -// Would be parsed as: -// -// []string{"a", "b:c d", "ef", `g"`} -// -func splitQuoted(s string) (r []string, err error) { - var args []string - arg := make([]rune, len(s)) - escaped := false - quoted := false - quote := '\x00' - i := 0 - for _, rune := range s { - switch { - case escaped: - escaped = false - case rune == '\\': - escaped = true - continue - case quote != '\x00': - if rune == quote { - quote = '\x00' - continue - } - case rune == '"' || rune == '\'': - quoted = true - quote = rune - continue - case unicode.IsSpace(rune): - if quoted || i > 0 { - quoted = false - args = append(args, string(arg[:i])) - i = 0 - } - continue - } - arg[i] = rune - i++ - } - if quoted || i > 0 { - args = append(args, string(arg[:i])) - } - if quote != 0 { - err = errors.New("unclosed quote") - } else if escaped { - err = errors.New("unfinished escaping") - } - return args, err -} - -// match returns true if the name is one of: -// -// $GOOS -// $GOARCH -// cgo (if cgo is enabled) -// !cgo (if cgo is disabled) -// ctxt.Compiler -// !ctxt.Compiler -// tag (if tag is listed in ctxt.BuildTags) -// !tag (if tag is not listed in ctxt.BuildTags) -// a comma-separated list of any of these -// -func (ctxt *Context) match(name string) bool { - if name == "" { - return false - } - if i := strings.Index(name, ","); i >= 0 { - // comma-separated list - return ctxt.match(name[:i]) && ctxt.match(name[i+1:]) - } - if strings.HasPrefix(name, "!!") { // bad syntax, reject always - return false - } - if strings.HasPrefix(name, "!") { // negation - return len(name) > 1 && !ctxt.match(name[1:]) - } - - // Tags must be letters, digits, underscores. - // Unlike in Go identifiers, all digits are fine (e.g., "386"). - for _, c := range name { - if !unicode.IsLetter(c) && !unicode.IsDigit(c) && c != '_' { - return false - } - } - - // special tags - if ctxt.CgoEnabled && name == "cgo" { - return true - } - if name == ctxt.GOOS || name == ctxt.GOARCH || name == ctxt.Compiler { - return true - } - - // other tags - for _, tag := range ctxt.BuildTags { - if tag == name { - return true - } - } - - return false -} - -// goodOSArchFile returns false if the name contains a $GOOS or $GOARCH -// suffix which does not match the current system. -// The recognized name formats are: -// -// name_$(GOOS).* -// name_$(GOARCH).* -// name_$(GOOS)_$(GOARCH).* -// name_$(GOOS)_test.* -// name_$(GOARCH)_test.* -// name_$(GOOS)_$(GOARCH)_test.* -// -func (ctxt *Context) goodOSArchFile(name string) bool { - if dot := strings.Index(name, "."); dot != -1 { - name = name[:dot] - } - l := strings.Split(name, "_") - if n := len(l); n > 0 && l[n-1] == "test" { - l = l[:n-1] - } - n := len(l) - if n >= 2 && knownOS[l[n-2]] && knownArch[l[n-1]] { - return l[n-2] == ctxt.GOOS && l[n-1] == ctxt.GOARCH - } - if n >= 1 && knownOS[l[n-1]] { - return l[n-1] == ctxt.GOOS - } - if n >= 1 && knownArch[l[n-1]] { - return l[n-1] == ctxt.GOARCH - } - return true -} - -var knownOS = make(map[string]bool) -var knownArch = make(map[string]bool) - -func init() { - for _, v := range strings.Fields(goosList) { - knownOS[v] = true - } - for _, v := range strings.Fields(goarchList) { - knownArch[v] = true - } -} - -// ToolDir is the directory containing build tools. -var ToolDir = filepath.Join(runtime.GOROOT(), "pkg/tool/"+runtime.GOOS+"_"+runtime.GOARCH) - -// IsLocalImport reports whether the import path is -// a local import path, like ".", "..", "./foo", or "../foo". -func IsLocalImport(path string) bool { - return path == "." || path == ".." || - strings.HasPrefix(path, "./") || strings.HasPrefix(path, "../") -} - -// ArchChar returns the architecture character for the given goarch. -// For example, ArchChar("amd64") returns "6". -func ArchChar(goarch string) (string, error) { - switch goarch { - case "386": - return "8", nil - case "amd64": - return "6", nil - case "arm": - return "5", nil - } - return "", errors.New("unsupported GOARCH " + goarch) -} |