168 lines
3.8 KiB
Go
168 lines
3.8 KiB
Go
package commands
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import (
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"bytes"
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"fmt"
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"github.com/hawser/git-hawser/hawser"
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"github.com/spf13/cobra"
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"io"
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"log"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"time"
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)
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var (
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Debugging = false
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ErrorBuffer = &bytes.Buffer{}
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ErrorWriter = io.MultiWriter(os.Stderr, ErrorBuffer)
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OutputWriter = io.MultiWriter(os.Stdout, ErrorBuffer)
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RootCmd = &cobra.Command{
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Use: "git-hawser",
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Short: "Hawser provides large file support to Git.",
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Run: func(cmd *cobra.Command, args []string) {
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versionCommand(cmd, args)
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cmd.Usage()
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},
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}
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)
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// Error prints a formatted message to Stderr. It also gets printed to the
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// panic log if one is created for this command.
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func Error(format string, args ...interface{}) {
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line := fmt.Sprintf(format, args...)
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fmt.Fprintln(ErrorWriter, line)
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}
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// Print prints a formatted message to Stdout. It also gets printed to the
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// panic log if one is created for this command.
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func Print(format string, args ...interface{}) {
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line := fmt.Sprintf(format, args...)
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fmt.Fprintln(OutputWriter, line)
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}
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// Exit prints a formatted message and exits.
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func Exit(format string, args ...interface{}) {
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Error(format, args...)
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os.Exit(2)
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}
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// Debug prints a formatted message if debugging is enabled. The formatted
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// message also shows up in the panic log, if created.
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func Debug(format string, args ...interface{}) {
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if !Debugging {
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return
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}
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log.Printf(format, args...)
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}
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// LoggedError prints a formatted message to Stderr and writes a stack trace for
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// the error to a log file without exiting.
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func LoggedError(err error, format string, args ...interface{}) {
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Error(format, args...)
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file := handlePanic(err)
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if len(file) > 0 {
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fmt.Fprintf(os.Stderr, "\nErrors logged to %s.\nUse `git hawser logs last` to view the log.\n", file)
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}
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}
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// Panic prints a formatted message, and writes a stack trace for the error to
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// a log file before exiting.
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func Panic(err error, format string, args ...interface{}) {
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LoggedError(err, format, args...)
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os.Exit(2)
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}
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func Run() {
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RootCmd.Execute()
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}
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func PipeMediaCommand(name string, args ...string) error {
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return PipeCommand("bin/"+name, args...)
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}
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func PipeCommand(name string, args ...string) error {
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cmd := exec.Command(name, args...)
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cmd.Stdin = os.Stdin
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cmd.Stderr = os.Stderr
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cmd.Stdout = os.Stdout
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return cmd.Run()
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}
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func handlePanic(err error) string {
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if err == nil {
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return ""
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}
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return logPanic(err, false)
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}
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func logEnv(w io.Writer) {
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for _, env := range hawser.Environ() {
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fmt.Fprintln(w, env)
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}
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}
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func logPanic(loggedError error, recursive bool) string {
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var fmtWriter io.Writer = os.Stderr
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if err := os.MkdirAll(hawser.LocalLogDir, 0755); err != nil {
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fmt.Fprintf(fmtWriter, "Unable to log panic to %s: %s\n\n", hawser.LocalLogDir, err.Error())
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return ""
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}
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now := time.Now()
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name := now.Format("20060102T150405.999999999")
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full := filepath.Join(hawser.LocalLogDir, name+".log")
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file, err := os.Create(full)
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if err == nil {
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fmtWriter = file
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defer file.Close()
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}
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fmt.Fprintf(fmtWriter, "> %s", filepath.Base(os.Args[0]))
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if len(os.Args) > 0 {
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fmt.Fprintf(fmtWriter, " %s", strings.Join(os.Args[1:], " "))
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}
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fmt.Fprint(fmtWriter, "\n")
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logEnv(fmtWriter)
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fmt.Fprint(fmtWriter, "\n")
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fmtWriter.Write(ErrorBuffer.Bytes())
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fmt.Fprint(fmtWriter, "\n")
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fmt.Fprintln(fmtWriter, loggedError.Error())
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if wErr, ok := loggedError.(ErrorWithStack); ok {
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fmt.Fprintln(fmtWriter, wErr.InnerError())
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for key, value := range wErr.Context() {
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fmt.Fprintf(fmtWriter, "%s=%s\n", key, value)
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}
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fmtWriter.Write(wErr.Stack())
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} else {
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fmtWriter.Write(hawser.Stack())
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}
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if err != nil && !recursive {
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fmt.Fprintf(fmtWriter, "Unable to log panic to %s\n\n", full)
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logPanic(err, true)
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}
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return full
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}
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type ErrorWithStack interface {
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Context() map[string]string
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InnerError() string
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Stack() []byte
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}
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func init() {
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log.SetOutput(ErrorWriter)
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}
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