forked from owenthereal/gh
/
runner.go
126 lines (106 loc) · 2.18 KB
/
runner.go
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package commands
import (
"flag"
"fmt"
"github.com/jingweno/gh/cmd"
"github.com/jingweno/gh/git"
"github.com/jingweno/gh/utils"
"github.com/kballard/go-shellquote"
"os/exec"
"syscall"
)
type ExecError struct {
Err error
ExitCode int
}
func (execError *ExecError) Error() string {
return execError.Err.Error()
}
func newExecError(err error) ExecError {
exitCode := 0
if err != nil {
exitCode = 1
if exitError, ok := err.(*exec.ExitError); ok {
if status, ok := exitError.Sys().(syscall.WaitStatus); ok {
exitCode = status.ExitStatus()
}
}
}
return ExecError{Err: err, ExitCode: exitCode}
}
type Runner struct {
Args []string
}
func (r *Runner) Execute() ExecError {
args := NewArgs(r.Args)
if args.Command == "" {
printUsage()
return newExecError(nil)
}
updater := NewUpdater()
err := updater.PromptForUpdate()
utils.Check(err)
expandAlias(args)
slurpGlobalFlags(args)
for _, cmd := range All() {
if cmd.Name() == args.Command && cmd.Runnable() {
if !cmd.GitExtension {
cmd.Flag.Usage = func() {
cmd.PrintUsage()
}
if err := cmd.Flag.Parse(args.Params); err != nil {
if err == flag.ErrHelp {
return newExecError(nil)
} else {
return newExecError(err)
}
}
args.Params = cmd.Flag.Args()
}
cmd.Run(cmd, args)
cmds := args.Commands()
var err error
if args.Noop {
printCommands(cmds)
} else {
err = executeCommands(cmds)
}
return newExecError(err)
}
}
err = git.Spawn(args.Command, args.Params...)
return newExecError(err)
}
func slurpGlobalFlags(args *Args) {
for i, p := range args.Params {
if p == "--noop" {
args.Noop = true
args.RemoveParam(i)
}
}
}
func printCommands(cmds []*cmd.Cmd) {
for _, c := range cmds {
fmt.Println(c)
}
}
func executeCommands(cmds []*cmd.Cmd) error {
for _, c := range cmds {
err := c.Exec()
if err != nil {
return err
}
}
return nil
}
func expandAlias(args *Args) {
cmd := args.Command
expandedCmd, err := git.Alias(cmd)
if err == nil && expandedCmd != "" {
words, err := shellquote.Split(expandedCmd)
if err == nil && len(words) > 0 {
args.Command = words[0]
args.PrependParams(words[1:]...)
}
}
}