*: clean up
* Get rid of the isErr func in main() * put main() logic closer to the top Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
This commit is contained in:
parent
690c85d4e8
commit
a8e4475c5e
GPG key ID:
10937E57733F1362
3 changed files with 269 additions and 300 deletions
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@ -29,6 +29,255 @@ var (
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flVersion = flag.Bool("version", false, "display the version of this tool")
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)
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func main() {
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// so that defers cleanly exec
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if err := app(); err != nil {
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log.Fatal(err)
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}
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}
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func app() error {
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flag.Parse()
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if *flDebug {
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os.Setenv("DEBUG", "1")
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}
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if *flVersion {
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fmt.Printf("%s :: %s\n", mtree.AppName, mtree.Version)
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return nil
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}
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// -list-keywords
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if *flListKeywords {
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fmt.Println("Available keywords:")
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for k := range mtree.KeywordFuncs {
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fmt.Print(" ")
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fmt.Print(k)
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if mtree.Keyword(k).Default() {
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fmt.Print(" (default)")
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}
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if !mtree.Keyword(k).Bsd() {
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fmt.Print(" (not upstream)")
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}
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fmt.Print("\n")
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}
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return nil
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}
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// --result-format
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formatFunc, ok := formats[*flResultFormat]
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if !ok {
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return fmt.Errorf("invalid output format: %s", *flResultFormat)
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}
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var (
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err error
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tmpKeywords []string
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currentKeywords []string
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)
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// -k <keywords>
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if *flUseKeywords != "" {
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tmpKeywords = splitKeywordsArg(*flUseKeywords)
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if !inSlice("type", tmpKeywords) {
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tmpKeywords = append([]string{"type"}, tmpKeywords...)
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}
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} else {
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if *flTar != "" {
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tmpKeywords = mtree.DefaultTarKeywords[:]
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} else {
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tmpKeywords = mtree.DefaultKeywords[:]
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}
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}
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// -K <keywords>
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if *flAddKeywords != "" {
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for _, kw := range splitKeywordsArg(*flAddKeywords) {
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if !inSlice(kw, tmpKeywords) {
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tmpKeywords = append(tmpKeywords, kw)
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}
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}
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}
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// -bsd-keywords
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if *flBsdKeywords {
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for _, k := range tmpKeywords {
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if mtree.Keyword(k).Bsd() {
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currentKeywords = append(currentKeywords, k)
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} else {
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fmt.Fprintf(os.Stderr, "INFO: ignoring %q as it is not an upstream keyword\n", k)
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}
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}
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} else {
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currentKeywords = tmpKeywords
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}
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// Check mutual exclusivity of keywords.
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// TODO(cyphar): Abstract this inside keywords.go.
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if inSlice("tar_time", currentKeywords) && inSlice("time", currentKeywords) {
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return fmt.Errorf("tar_time and time are mutually exclusive keywords")
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}
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// If we're doing a comparison, we always are comparing between a spec and
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// state DH. If specDh is nil, we are generating a new one.
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var (
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specDh *mtree.DirectoryHierarchy
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stateDh *mtree.DirectoryHierarchy
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specKeywords []string
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)
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// -f <file>
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if *flFile != "" && !*flCreate {
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// load the hierarchy, if we're not creating a new spec
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fh, err := os.Open(*flFile)
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if err != nil {
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return err
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}
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specDh, err = mtree.ParseSpec(fh)
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fh.Close()
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if err != nil {
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return err
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}
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// We can't check against more fields than in the specKeywords list, so
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// currentKeywords can only have a subset of specKeywords.
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specKeywords = mtree.CollectUsedKeywords(specDh)
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}
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// -list-used
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if *flListUsedKeywords {
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if specDh == nil {
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return fmt.Errorf("no specification provided. please provide a validation manifest")
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}
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if *flResultFormat == "json" {
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// if they're asking for json, give it to them
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data := map[string][]string{*flFile: specKeywords}
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buf, err := json.MarshalIndent(data, "", " ")
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if err != nil {
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return err
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}
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fmt.Println(string(buf))
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} else {
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fmt.Printf("Keywords used in [%s]:\n", *flFile)
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for _, kw := range specKeywords {
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fmt.Printf(" %s", kw)
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if _, ok := mtree.KeywordFuncs[kw]; !ok {
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fmt.Print(" (unsupported)")
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}
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fmt.Printf("\n")
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}
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}
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return nil
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}
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if specKeywords != nil {
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// If we didn't actually change the set of keywords, we can just use specKeywords.
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if *flUseKeywords == "" && *flAddKeywords == "" {
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currentKeywords = specKeywords
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}
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for _, keyword := range currentKeywords {
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// As always, time is a special case.
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// TODO: Fix that.
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if (keyword == "time" && inSlice("tar_time", specKeywords)) || (keyword == "tar_time" && inSlice("time", specKeywords)) {
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continue
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}
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if !inSlice(keyword, specKeywords) {
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return fmt.Errorf("cannot verify keywords not in mtree specification: %s\n", keyword)
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}
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}
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}
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// -p and -T are mutually exclusive
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if *flPath != "" && *flTar != "" {
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return fmt.Errorf("options -T and -p are mutually exclusive")
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}
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// -p <path>
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var rootPath = "."
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if *flPath != "" {
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rootPath = *flPath
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}
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// -T <tar file>
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if *flTar != "" {
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var input io.Reader
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if *flTar == "-" {
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input = os.Stdin
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} else {
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fh, err := os.Open(*flTar)
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if err != nil {
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return err
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}
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defer fh.Close()
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input = fh
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}
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ts := mtree.NewTarStreamer(input, currentKeywords)
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if _, err := io.Copy(ioutil.Discard, ts); err != nil && err != io.EOF {
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return err
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}
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if err := ts.Close(); err != nil {
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return err
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}
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var err error
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stateDh, err = ts.Hierarchy()
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if err != nil {
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return err
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}
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} else {
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// with a root directory
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stateDh, err = mtree.Walk(rootPath, nil, currentKeywords)
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if err != nil {
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return err
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}
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}
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// -c
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if *flCreate {
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fh := os.Stdout
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if *flFile != "" {
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fh, err = os.Create(*flFile)
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if err != nil {
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return err
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}
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}
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// output stateDh
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stateDh.WriteTo(fh)
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return nil
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}
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// This is a validation.
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if specDh != nil && stateDh != nil {
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var res []mtree.InodeDelta
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res, err = mtree.Compare(specDh, stateDh, currentKeywords)
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if err != nil {
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return err
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}
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if res != nil {
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if isTarSpec(specDh) || *flTar != "" {
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res = filterMissingKeywords(res)
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}
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if len(res) > 0 {
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return fmt.Errorf("unexpected missing keywords: %d", len(res))
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}
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out := formatFunc(res)
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if _, err := os.Stdout.Write([]byte(out)); err != nil {
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return err
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}
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}
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} else {
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return fmt.Errorf("neither validating or creating a manifest. Please provide additional arguments")
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}
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return nil
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}
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var formats = map[string]func([]mtree.InodeDelta) string{
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// Outputs the errors in the BSD format.
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"bsd": func(d []mtree.InodeDelta) string {
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@ -146,292 +395,6 @@ func isTarSpec(spec *mtree.DirectoryHierarchy) bool {
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return false
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}
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func main() {
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flag.Parse()
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if *flDebug {
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os.Setenv("DEBUG", "1")
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}
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// so that defers cleanly exec
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// TODO: Switch everything to being inside a function, to remove the need for isErr.
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var isErr bool
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defer func() {
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if isErr {
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os.Exit(1)
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}
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}()
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if *flVersion {
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fmt.Printf("%s :: %s\n", os.Args[0], mtree.Version)
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return
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}
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// -list-keywords
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if *flListKeywords {
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fmt.Println("Available keywords:")
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for k := range mtree.KeywordFuncs {
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fmt.Print(" ")
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fmt.Print(k)
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if mtree.Keyword(k).Default() {
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fmt.Print(" (default)")
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}
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if !mtree.Keyword(k).Bsd() {
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fmt.Print(" (not upstream)")
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}
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fmt.Print("\n")
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}
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return
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}
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// --result-format
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formatFunc, ok := formats[*flResultFormat]
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if !ok {
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log.Printf("invalid output format: %s", *flResultFormat)
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isErr = true
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return
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}
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var (
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err error
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tmpKeywords []string
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currentKeywords []string
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)
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// -k <keywords>
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if *flUseKeywords != "" {
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tmpKeywords = splitKeywordsArg(*flUseKeywords)
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if !inSlice("type", tmpKeywords) {
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tmpKeywords = append([]string{"type"}, tmpKeywords...)
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}
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} else {
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if *flTar != "" {
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tmpKeywords = mtree.DefaultTarKeywords[:]
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} else {
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tmpKeywords = mtree.DefaultKeywords[:]
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}
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}
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// -K <keywords>
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if *flAddKeywords != "" {
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for _, kw := range splitKeywordsArg(*flAddKeywords) {
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if !inSlice(kw, tmpKeywords) {
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tmpKeywords = append(tmpKeywords, kw)
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}
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}
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}
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// -bsd-keywords
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if *flBsdKeywords {
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for _, k := range tmpKeywords {
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if mtree.Keyword(k).Bsd() {
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currentKeywords = append(currentKeywords, k)
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} else {
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fmt.Fprintf(os.Stderr, "INFO: ignoring %q as it is not an upstream keyword\n", k)
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}
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}
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} else {
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currentKeywords = tmpKeywords
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}
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// Check mutual exclusivity of keywords.
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// TODO(cyphar): Abstract this inside keywords.go.
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if inSlice("tar_time", currentKeywords) && inSlice("time", currentKeywords) {
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log.Printf("tar_time and time are mutually exclusive keywords")
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isErr = true
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return
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}
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// If we're doing a comparison, we always are comparing between a spec and
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// state DH. If specDh is nil, we are generating a new one.
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var (
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specDh *mtree.DirectoryHierarchy
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stateDh *mtree.DirectoryHierarchy
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specKeywords []string
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)
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// -f <file>
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if *flFile != "" && !*flCreate {
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// load the hierarchy, if we're not creating a new spec
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fh, err := os.Open(*flFile)
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if err != nil {
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log.Println(err)
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isErr = true
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return
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}
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specDh, err = mtree.ParseSpec(fh)
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fh.Close()
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if err != nil {
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log.Println(err)
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isErr = true
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return
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}
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// We can't check against more fields than in the specKeywords list, so
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// currentKeywords can only have a subset of specKeywords.
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specKeywords = mtree.CollectUsedKeywords(specDh)
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}
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// -list-used
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if *flListUsedKeywords {
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if specDh == nil {
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log.Println("no specification provided. please provide a validation manifest")
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isErr = true
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return
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}
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if *flResultFormat == "json" {
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// if they're asking for json, give it to them
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data := map[string][]string{*flFile: specKeywords}
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buf, err := json.MarshalIndent(data, "", " ")
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if err != nil {
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defer os.Exit(1)
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isErr = true
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return
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}
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fmt.Println(string(buf))
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} else {
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fmt.Printf("Keywords used in [%s]:\n", *flFile)
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for _, kw := range specKeywords {
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fmt.Printf(" %s", kw)
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if _, ok := mtree.KeywordFuncs[kw]; !ok {
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fmt.Print(" (unsupported)")
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}
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fmt.Printf("\n")
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}
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}
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return
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}
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|
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if specKeywords != nil {
|
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// If we didn't actually change the set of keywords, we can just use specKeywords.
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if *flUseKeywords == "" && *flAddKeywords == "" {
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currentKeywords = specKeywords
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}
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|
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for _, keyword := range currentKeywords {
|
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// As always, time is a special case.
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// TODO: Fix that.
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if (keyword == "time" && inSlice("tar_time", specKeywords)) || (keyword == "tar_time" && inSlice("time", specKeywords)) {
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continue
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}
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if !inSlice(keyword, specKeywords) {
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log.Printf("cannot verify keywords not in mtree specification: %s\n", keyword)
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isErr = true
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}
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if isErr {
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return
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}
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}
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}
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|
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// -p and -T are mutually exclusive
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if *flPath != "" && *flTar != "" {
|
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log.Println("options -T and -p are mutually exclusive")
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isErr = true
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return
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}
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// -p <path>
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var rootPath = "."
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if *flPath != "" {
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rootPath = *flPath
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}
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// -T <tar file>
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if *flTar != "" {
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var input io.Reader
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if *flTar == "-" {
|
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input = os.Stdin
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} else {
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fh, err := os.Open(*flTar)
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if err != nil {
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log.Println(err)
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isErr = true
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return
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}
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defer fh.Close()
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input = fh
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}
|
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ts := mtree.NewTarStreamer(input, currentKeywords)
|
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|
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if _, err := io.Copy(ioutil.Discard, ts); err != nil && err != io.EOF {
|
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log.Println(err)
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isErr = true
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return
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}
|
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if err := ts.Close(); err != nil {
|
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log.Println(err)
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isErr = true
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return
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}
|
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var err error
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stateDh, err = ts.Hierarchy()
|
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if err != nil {
|
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log.Println(err)
|
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isErr = true
|
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return
|
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}
|
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} else {
|
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// with a root directory
|
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stateDh, err = mtree.Walk(rootPath, nil, currentKeywords)
|
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if err != nil {
|
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log.Println(err)
|
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isErr = true
|
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return
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}
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}
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|
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// -c
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if *flCreate {
|
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fh := os.Stdout
|
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if *flFile != "" {
|
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fh, err = os.Create(*flFile)
|
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if err != nil {
|
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log.Println(err)
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isErr = true
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return
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}
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}
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|
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// output stateDh
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stateDh.WriteTo(fh)
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return
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}
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|
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// This is a validation.
|
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if specDh != nil && stateDh != nil {
|
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var res []mtree.InodeDelta
|
||||
|
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res, err = mtree.Compare(specDh, stateDh, currentKeywords)
|
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if err != nil {
|
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log.Println(err)
|
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isErr = true
|
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return
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}
|
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if res != nil {
|
||||
if isTarSpec(specDh) || *flTar != "" {
|
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res = filterMissingKeywords(res)
|
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}
|
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if len(res) > 0 {
|
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defer os.Exit(1)
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}
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out := formatFunc(res)
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if _, err := os.Stdout.Write([]byte(out)); err != nil {
|
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log.Println(err)
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isErr = true
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return
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}
|
||||
}
|
||||
} else {
|
||||
log.Println("neither validating or creating a manifest. Please provide additional arguments")
|
||||
isErr = true
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
func splitKeywordsArg(str string) []string {
|
||||
return strings.Fields(strings.Replace(str, ",", " ", -1))
|
||||
}
|
||||
|
|
|
|||
|
|
@ -29,7 +29,10 @@ func (dh DirectoryHierarchy) WriteTo(w io.Writer) (n int64, err error) {
|
|||
// CollectUsedKeywords collects and returns all the keywords used in a
|
||||
// a DirectoryHierarchy
|
||||
func CollectUsedKeywords(dh *DirectoryHierarchy) []string {
|
||||
if dh != nil {
|
||||
if dh == nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
usedkeywords := []string{}
|
||||
for _, e := range dh.Entries {
|
||||
switch e.Type {
|
||||
|
|
@ -46,6 +49,4 @@ func CollectUsedKeywords(dh *DirectoryHierarchy) []string {
|
|||
}
|
||||
}
|
||||
return usedkeywords
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
|
|
|||
|
|
@ -2,6 +2,11 @@ package mtree
|
|||
|
||||
import "fmt"
|
||||
|
||||
const (
|
||||
// AppName is the name ... of this library/application
|
||||
AppName = "gomtree"
|
||||
)
|
||||
|
||||
const (
|
||||
// VersionMajor is for an API incompatible changes
|
||||
VersionMajor = 0
|
||||
|
|
|
|||
Loading…
Reference in a new issue