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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:19:13 +0000 |
commit | ccd992355df7192993c666236047820244914598 (patch) | |
tree | f00fea65147227b7743083c6148396f74cd66935 /src/cmd/go/internal/version/version.go | |
parent | Initial commit. (diff) | |
download | golang-1.21-ccd992355df7192993c666236047820244914598.tar.xz golang-1.21-ccd992355df7192993c666236047820244914598.zip |
Adding upstream version 1.21.8.upstream/1.21.8
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/cmd/go/internal/version/version.go')
-rw-r--r-- | src/cmd/go/internal/version/version.go | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/cmd/go/internal/version/version.go b/src/cmd/go/internal/version/version.go new file mode 100644 index 0000000..4a0132a --- /dev/null +++ b/src/cmd/go/internal/version/version.go @@ -0,0 +1,173 @@ +// 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 version implements the “go version” command. +package version + +import ( + "context" + "debug/buildinfo" + "errors" + "fmt" + "io/fs" + "os" + "path/filepath" + "runtime" + "strings" + + "cmd/go/internal/base" + "cmd/go/internal/gover" +) + +var CmdVersion = &base.Command{ + UsageLine: "go version [-m] [-v] [file ...]", + Short: "print Go version", + Long: `Version prints the build information for Go binary files. + +Go version reports the Go version used to build each of the named files. + +If no files are named on the command line, go version prints its own +version information. + +If a directory is named, go version walks that directory, recursively, +looking for recognized Go binaries and reporting their versions. +By default, go version does not report unrecognized files found +during a directory scan. The -v flag causes it to report unrecognized files. + +The -m flag causes go version to print each file's embedded +module version information, when available. In the output, the module +information consists of multiple lines following the version line, each +indented by a leading tab character. + +See also: go doc runtime/debug.BuildInfo. +`, +} + +func init() { + base.AddChdirFlag(&CmdVersion.Flag) + CmdVersion.Run = runVersion // break init cycle +} + +var ( + versionM = CmdVersion.Flag.Bool("m", false, "") + versionV = CmdVersion.Flag.Bool("v", false, "") +) + +func runVersion(ctx context.Context, cmd *base.Command, args []string) { + if len(args) == 0 { + // If any of this command's flags were passed explicitly, error + // out, because they only make sense with arguments. + // + // Don't error if the flags came from GOFLAGS, since that can be + // a reasonable use case. For example, imagine GOFLAGS=-v to + // turn "verbose mode" on for all Go commands, which should not + // break "go version". + var argOnlyFlag string + if !base.InGOFLAGS("-m") && *versionM { + argOnlyFlag = "-m" + } else if !base.InGOFLAGS("-v") && *versionV { + argOnlyFlag = "-v" + } + if argOnlyFlag != "" { + fmt.Fprintf(os.Stderr, "go: 'go version' only accepts %s flag with arguments\n", argOnlyFlag) + base.SetExitStatus(2) + return + } + v := runtime.Version() + if gover.TestVersion != "" { + v = gover.TestVersion + " (TESTGO_VERSION)" + } + fmt.Printf("go version %s %s/%s\n", v, runtime.GOOS, runtime.GOARCH) + return + } + + for _, arg := range args { + info, err := os.Stat(arg) + if err != nil { + fmt.Fprintf(os.Stderr, "%v\n", err) + base.SetExitStatus(1) + continue + } + if info.IsDir() { + scanDir(arg) + } else { + scanFile(arg, info, true) + } + } +} + +// scanDir scans a directory for binary to run scanFile on. +func scanDir(dir string) { + filepath.WalkDir(dir, func(path string, d fs.DirEntry, err error) error { + if d.Type().IsRegular() || d.Type()&fs.ModeSymlink != 0 { + info, err := d.Info() + if err != nil { + if *versionV { + fmt.Fprintf(os.Stderr, "%s: %v\n", path, err) + } + return nil + } + scanFile(path, info, *versionV) + } + return nil + }) +} + +// isGoBinaryCandidate reports whether the file is a candidate to be a Go binary. +func isGoBinaryCandidate(file string, info fs.FileInfo) bool { + if info.Mode().IsRegular() && info.Mode()&0111 != 0 { + return true + } + name := strings.ToLower(file) + switch filepath.Ext(name) { + case ".so", ".exe", ".dll": + return true + default: + return strings.Contains(name, ".so.") + } +} + +// scanFile scans file to try to report the Go and module versions. +// If mustPrint is true, scanFile will report any error reading file. +// Otherwise (mustPrint is false, because scanFile is being called +// by scanDir) scanFile prints nothing for non-Go binaries. +func scanFile(file string, info fs.FileInfo, mustPrint bool) { + if info.Mode()&fs.ModeSymlink != 0 { + // Accept file symlinks only. + i, err := os.Stat(file) + if err != nil || !i.Mode().IsRegular() { + if mustPrint { + fmt.Fprintf(os.Stderr, "%s: symlink\n", file) + } + return + } + info = i + } + + bi, err := buildinfo.ReadFile(file) + if err != nil { + if mustPrint { + if pathErr := (*os.PathError)(nil); errors.As(err, &pathErr) && filepath.Clean(pathErr.Path) == filepath.Clean(file) { + fmt.Fprintf(os.Stderr, "%v\n", file) + } else { + + // Skip errors for non-Go binaries. + // buildinfo.ReadFile errors are not fine-grained enough + // to know if the file is a Go binary or not, + // so try to infer it from the file mode and extension. + if isGoBinaryCandidate(file, info) { + fmt.Fprintf(os.Stderr, "%s: %v\n", file, err) + } + } + } + return + } + + fmt.Printf("%s: %s\n", file, bi.GoVersion) + bi.GoVersion = "" // suppress printing go version again + mod := bi.String() + if *versionM && len(mod) > 0 { + fmt.Printf("\t%s\n", strings.ReplaceAll(mod[:len(mod)-1], "\n", "\n\t")) + } +} |