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beam/examples/beamsh: support for background commands with '&' terminator

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Docker-DCO-1.1-Signed-off-by: Solomon Hykes <solomon@docker.com> (github: shykes)
This commit is contained in:
Solomon Hykes 2014-03-27 18:26:42 -07:00
parent 086724e1a3
commit 529e741f08
2 changed files with 16 additions and 3 deletions
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10
beam/examples/beamsh/beamsh.go
View file

@ -136,11 +136,21 @@ func scriptString(script []*dockerscript.Command) string {
func executeScript(client *net.UnixConn, script []*dockerscript.Command) error { func executeScript(client *net.UnixConn, script []*dockerscript.Command) error {
Debugf("executeScript(%s)\n", scriptString(script)) Debugf("executeScript(%s)\n", scriptString(script))
defer Debugf("executeScript(%s) DONE\n", scriptString(script)) defer Debugf("executeScript(%s) DONE\n", scriptString(script))
var background sync.WaitGroup
defer background.Wait()
for _, cmd := range script { for _, cmd := range script {
if cmd.Background {
background.Add(1)
go func(client *net.UnixConn, cmd *dockerscript.Command) {
executeCommand(client, cmd)
background.Done()
}(client, cmd)
} else {
if err := executeCommand(client, cmd); err != nil { if err := executeCommand(client, cmd); err != nil {
return err return err
} }
} }
}
return nil return nil
} }

5
dockerscript/dockerscript.go
View file

@ -10,6 +10,7 @@ import (
type Command struct { type Command struct {
Args []string Args []string
Children []*Command Children []*Command
Background bool
} }
type Scanner struct { type Scanner struct {
@ -72,7 +73,7 @@ func parseArgs(s *Scanner) ([]string, rune, error) {
return args, tok, nil return args, tok, nil
} }
if !s.commentLine { if !s.commentLine {
if text == "{" || text == "}" || text == "\n" || text == "\r" || text == ";" { if text == "{" || text == "}" || text == "\n" || text == "\r" || text == ";" || text == "&" {
return args, tok, nil return args, tok, nil
} }
args = append(args, text) args = append(args, text)
@ -106,6 +107,8 @@ func parse(s *Scanner, opener string) (expr []*Command, err error) {
cmd.Children = children cmd.Children = children
} else if afterArgs == "}" && opener != "{" { } else if afterArgs == "}" && opener != "{" {
return nil, fmt.Errorf("unexpected end of block '}'") return nil, fmt.Errorf("unexpected end of block '}'")
} else if afterArgs == "&" {
cmd.Background = true
} }
if len(cmd.Args) > 0 || len(cmd.Children) > 0 { if len(cmd.Args) > 0 || len(cmd.Children) > 0 {
expr = append(expr, cmd) expr = append(expr, cmd)