// importPaths returns the import paths to use for the given command line.
func importPaths(args []string) []string {
args = importPathsNoDotExpansion(args)
var out []string
for _, a := range args {
if strings.Contains(a, "...") {
if build.IsLocalImport(a) {
out = append(out, allPackagesInFS(a)...)
} else {
out = append(out, allPackages(a)...)
}
continue
}
out = append(out, a)
}
return out
}
// loadImport scans the directory named by path, which must be an import path,
// but possibly a local import path (an absolute file system path or one beginning
// with ./ or ../). A local relative path is interpreted relative to srcDir.
// It returns a *Package describing the package found in that directory.
func loadImport(path string, srcDir string, stk *importStack, importPos []token.Position) *Package {
stk.push(path)
defer stk.pop()
// Determine canonical identifier for this package.
// For a local import the identifier is the pseudo-import path
// we create from the full directory to the package.
// Otherwise it is the usual import path.
importPath := path
isLocal := build.IsLocalImport(path)
if isLocal {
importPath = dirToImportPath(filepath.Join(srcDir, path))
}
if p := packageCache[importPath]; p != nil {
return reusePackage(p, stk)
}
p := new(Package)
p.local = isLocal
p.ImportPath = importPath
packageCache[importPath] = p
// Load package.
// Import always returns bp != nil, even if an error occurs,
// in order to return partial information.
//
// TODO: After Go 1, decide when to pass build.AllowBinary here.
// See issue 3268 for mistakes to avoid.
bp, err := buildContext.Import(path, srcDir, 0)
bp.ImportPath = importPath
if gobin != "" {
bp.BinDir = gobin
}
p.load(stk, bp, err)
if p.Error != nil && len(importPos) > 0 {
pos := importPos[0]
pos.Filename = shortPath(pos.Filename)
p.Error.Pos = pos.String()
}
return p
}
// downloadPaths prepares the list of paths to pass to download.
// It expands ... patterns that can be expanded. If there is no match
// for a particular pattern, downloadPaths leaves it in the result list,
// in the hope that we can figure out the repository from the
// initial ...-free prefix.
func downloadPaths(args []string) []string {
args = importPathsNoDotExpansion(args)
var out []string
for _, a := range args {
if strings.Contains(a, "...") {
var expand []string
// Use matchPackagesInFS to avoid printing
// warnings. They will be printed by the
// eventual call to importPaths instead.
if build.IsLocalImport(a) {
expand = matchPackagesInFS(a)
} else {
expand = matchPackages(a)
}
if len(expand) > 0 {
out = append(out, expand...)
continue
}
}
out = append(out, a)
}
return out
}
func runTest(cmd *Command, args []string) {
var pkgArgs []string
pkgArgs, testArgs = testFlags(args)
raceInit()
pkgs := packagesForBuild(pkgArgs)
if len(pkgs) == 0 {
fatalf("no packages to test")
}
if testC && len(pkgs) != 1 {
fatalf("cannot use -c flag with multiple packages")
}
if testProfile && len(pkgs) != 1 {
fatalf("cannot use test profile flag with multiple packages")
}
// If a test timeout was given and is parseable, set our kill timeout
// to that timeout plus one minute. This is a backup alarm in case
// the test wedges with a goroutine spinning and its background
// timer does not get a chance to fire.
if dt, err := time.ParseDuration(testTimeout); err == nil && dt > 0 {
testKillTimeout = dt + 1*time.Minute
}
// show passing test output (after buffering) with -v flag.
// must buffer because tests are running in parallel, and
// otherwise the output will get mixed.
testShowPass = testV
// stream test output (no buffering) when no package has
// been given on the command line (implicit current directory)
// or when benchmarking.
// Also stream if we're showing output anyway with a
// single package under test. In that case, streaming the
// output produces the same result as not streaming,
// just more immediately.
testStreamOutput = len(pkgArgs) == 0 || testBench ||
(len(pkgs) <= 1 && testShowPass)
var b builder
b.init()
if testI {
buildV = testV
deps := map[string]bool{
// Dependencies for testmain.
"testing": true,
"regexp": true,
}
for _, p := range pkgs {
// Dependencies for each test.
for _, path := range p.Imports {
deps[path] = true
}
for _, path := range p.TestImports {
deps[path] = true
}
for _, path := range p.XTestImports {
deps[path] = true
}
}
// translate C to runtime/cgo
if deps["C"] {
delete(deps, "C")
deps["runtime/cgo"] = true
if buildContext.GOOS == runtime.GOOS && buildContext.GOARCH == runtime.GOARCH {
deps["cmd/cgo"] = true
}
}
// Ignore pseudo-packages.
delete(deps, "unsafe")
all := []string{}
for path := range deps {
if !build.IsLocalImport(path) {
all = append(all, path)
}
}
sort.Strings(all)
a := &action{}
for _, p := range packagesForBuild(all) {
a.deps = append(a.deps, b.action(modeInstall, modeInstall, p))
}
b.do(a)
if !testC {
return
}
b.init()
}
var builds, runs, prints []*action
// Prepare build + run + print actions for all packages being tested.
for _, p := range pkgs {
buildTest, runTest, printTest, err := b.test(p)
if err != nil {
str := err.Error()
if strings.HasPrefix(str, "\n") {
str = str[1:]
}
if p.ImportPath != "" {
errorf("# %s\n%s", p.ImportPath, str)
} else {
errorf("%s", str)
}
continue
}
builds = append(builds, buildTest)
runs = append(runs, runTest)
prints = append(prints, printTest)
}
// Ultimately the goal is to print the output.
root := &action{deps: prints}
// Force the printing of results to happen in order,
// one at a time.
for i, a := range prints {
if i > 0 {
a.deps = append(a.deps, prints[i-1])
}
}
// If we are benchmarking, force everything to
// happen in serial. Could instead allow all the
// builds to run before any benchmarks start,
// but try this for now.
if testBench {
for i, a := range builds {
if i > 0 {
// Make build of test i depend on
// completing the run of test i-1.
a.deps = append(a.deps, runs[i-1])
}
}
}
// If we are building any out-of-date packages other
// than those under test, warn.
okBuild := map[*Package]bool{}
for _, p := range pkgs {
okBuild[p] = true
}
warned := false
for _, a := range actionList(root) {
if a.p != nil && a.f != nil && !okBuild[a.p] && !a.p.fake && !a.p.local {
okBuild[a.p] = true // don't warn again
if !warned {
fmt.Fprintf(os.Stderr, "warning: building out-of-date packages:\n")
warned = true
}
fmt.Fprintf(os.Stderr, "\t%s\n", a.p.ImportPath)
}
}
if warned {
args := strings.Join(pkgArgs, " ")
if args != "" {
args = " " + args
}
extraOpts := ""
if buildRace {
extraOpts = "-race "
}
fmt.Fprintf(os.Stderr, "installing these packages with 'go test %s-i%s' will speed future tests.\n\n", extraOpts, args)
}
b.do(root)
}
// download runs the download half of the get command
// for the package named by the argument.
func download(arg string, stk *importStack) {
p := loadPackage(arg, stk)
// There's nothing to do if this is a package in the standard library.
if p.Standard {
return
}
// Only process each package once.
if downloadCache[arg] {
return
}
downloadCache[arg] = true
pkgs := []*Package{p}
wildcardOkay := len(*stk) == 0
// Download if the package is missing, or update if we're using -u.
if p.Dir == "" || *getU {
// The actual download.
stk.push(p.ImportPath)
err := downloadPackage(p)
if err != nil {
errorf("%s", &PackageError{ImportStack: stk.copy(), Err: err.Error()})
stk.pop()
return
}
args := []string{arg}
// If the argument has a wildcard in it, re-evaluate the wildcard.
// We delay this until after reloadPackage so that the old entry
// for p has been replaced in the package cache.
if wildcardOkay && strings.Contains(arg, "...") {
if build.IsLocalImport(arg) {
args = matchPackagesInFS(arg)
} else {
args = matchPackages(arg)
}
}
// Clear all relevant package cache entries before
// doing any new loads.
for _, arg := range args {
p := packageCache[arg]
if p != nil {
delete(packageCache, p.Dir)
delete(packageCache, p.ImportPath)
}
}
pkgs = pkgs[:0]
for _, arg := range args {
stk.push(arg)
p := loadPackage(arg, stk)
stk.pop()
if p.Error != nil {
errorf("%s", p.Error)
continue
}
pkgs = append(pkgs, p)
}
}
// Process package, which might now be multiple packages
// due to wildcard expansion.
for _, p := range pkgs {
if *getFix {
run(stringList(tool("fix"), relPaths(p.allgofiles)))
// The imports might have changed, so reload again.
p = reloadPackage(arg, stk)
if p.Error != nil {
errorf("%s", p.Error)
return
}
}
// Process dependencies, now that we know what they are.
for _, dep := range p.deps {
download(dep.ImportPath, stk)
}
}
}
func main() {
_ = go11tag
flag.Usage = usage
flag.Parse()
log.SetFlags(0)
args := flag.Args()
if len(args) < 1 {
usage()
}
if args[0] == "help" {
help(args[1:])
return
}
// Diagnose common mistake: GOPATH==GOROOT.
// This setting is equivalent to not setting GOPATH at all,
// which is not what most people want when they do it.
if gopath := os.Getenv("GOPATH"); gopath == runtime.GOROOT() {
fmt.Fprintf(os.Stderr, "warning: GOPATH set to GOROOT (%s) has no effect\n", gopath)
} else {
for _, p := range filepath.SplitList(gopath) {
// Note: using HasPrefix instead of Contains because a ~ can appear
// in the middle of directory elements, such as /tmp/git-1.8.2~rc3
// or C:\PROGRA~1. Only ~ as a path prefix has meaning to the shell.
if strings.HasPrefix(p, "~") {
fmt.Fprintf(os.Stderr, "go: GOPATH entry cannot start with shell metacharacter '~': %q\n", p)
os.Exit(2)
}
if build.IsLocalImport(p) {
fmt.Fprintf(os.Stderr, "go: GOPATH entry is relative; must be absolute path: %q.\nRun 'go help gopath' for usage.\n", p)
os.Exit(2)
}
}
}
if fi, err := os.Stat(goroot); err != nil || !fi.IsDir() {
fmt.Fprintf(os.Stderr, "go: cannot find GOROOT directory: %v\n", goroot)
os.Exit(2)
}
for _, cmd := range commands {
if cmd.Name() == args[0] && cmd.Run != nil {
cmd.Flag.Usage = func() { cmd.Usage() }
if cmd.CustomFlags {
args = args[1:]
} else {
cmd.Flag.Parse(args[1:])
args = cmd.Flag.Args()
}
cmd.Run(cmd, args)
exit()
return
}
}
fmt.Fprintf(os.Stderr, "go: unknown subcommand %q\nRun 'go help' for usage.\n", args[0])
setExitStatus(2)
exit()
}
// loadPackage is like loadImport but is used for command-line arguments,
// not for paths found in import statements. In addition to ordinary import paths,
// loadPackage accepts pseudo-paths beginning with cmd/ to denote commands
// in the Go command directory, as well as paths to those directories.
func loadPackage(arg string, stk *importStack) *Package {
if build.IsLocalImport(arg) {
dir := arg
if !filepath.IsAbs(dir) {
if abs, err := filepath.Abs(dir); err == nil {
// interpret relative to current directory
dir = abs
}
}
if sub, ok := hasSubdir(gorootSrc, dir); ok && strings.HasPrefix(sub, "cmd/") && !strings.Contains(sub[4:], "/") {
arg = sub
}
}
if strings.HasPrefix(arg, "cmd/") {
if p := cmdCache[arg]; p != nil {
return p
}
stk.push(arg)
defer stk.pop()
if strings.Contains(arg[4:], "/") {
p := &Package{
Error: &PackageError{
ImportStack: stk.copy(),
Err: fmt.Sprintf("invalid import path: cmd/... is reserved for Go commands"),
},
}
return p
}
bp, err := buildContext.ImportDir(filepath.Join(gorootSrc, arg), 0)
bp.ImportPath = arg
bp.Goroot = true
bp.BinDir = gorootBin
if gobin != "" {
bp.BinDir = gobin
}
bp.Root = goroot
bp.SrcRoot = gorootSrc
p := new(Package)
cmdCache[arg] = p
p.load(stk, bp, err)
if p.Error == nil && p.Name != "main" {
p.Error = &PackageError{
ImportStack: stk.copy(),
Err: fmt.Sprintf("expected package main but found package %s in %s", p.Name, p.Dir),
}
}
return p
}
// Wasn't a command; must be a package.
// If it is a local import path but names a standard package,
// we treat it as if the user specified the standard package.
// This lets you run go test ./ioutil in package io and be
// referring to io/ioutil rather than a hypothetical import of
// "./ioutil".
if build.IsLocalImport(arg) {
bp, _ := buildContext.ImportDir(filepath.Join(cwd, arg), build.FindOnly)
if bp.ImportPath != "" && bp.ImportPath != "." {
arg = bp.ImportPath
}
}
return loadImport(arg, cwd, stk, nil)
}