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cli: Add a 'version' version

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Pass version and git commit hash from the Makefile
into main.go. Add a 'version' subcommand to print
the information.

While at it also tweak the help output to only print the
command name and not the entire path.

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
This commit is contained in:
Rolf Neugebauer
2017-04-05 23:53:35 +01:00
parent ae4b9ba897
commit 048218f7c8
1 changed files with 18 additions and 2 deletions
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20
src/cmd/moby/main.go
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@@ -4,12 +4,19 @@ import (
"flag"
"fmt"
"os"
"path/filepath"
log "github.com/Sirupsen/logrus"
)
var (
defaultLogFormatter = &log.TextFormatter{}
// Version is the human-readable version
Version = "unknown"
// GitCommit hash, set at compile time
GitCommit = "unknown"
)
// infoFormatter overrides the default format for Info() log events to
@@ -24,15 +31,22 @@ func (f *infoFormatter) Format(entry *log.Entry) ([]byte, error) {
return defaultLogFormatter.Format(entry)
}
func version() {
fmt.Printf("%s version %s\n", filepath.Base(os.Args[0]), Version)
fmt.Printf("commit: %s\n", GitCommit)
os.Exit(0)
}
func main() {
flag.Usage = func() {
fmt.Printf("USAGE: %s [options] COMMAND\n\n", os.Args[0])
fmt.Printf("USAGE: %s [options] COMMAND\n\n", filepath.Base(os.Args[0]))
fmt.Printf("Commands:\n")
fmt.Printf(" build Build a Moby image from a YAML file\n")
fmt.Printf(" run Run a Moby image on a local hypervisor\n")
fmt.Printf(" version Print version information\n")
fmt.Printf(" help Print this message\n")
fmt.Printf("\n")
fmt.Printf("Run '%s COMMAND --help' for more information on the command\n", os.Args[0])
fmt.Printf("Run '%s COMMAND --help' for more information on the command\n", filepath.Base(os.Args[0]))
fmt.Printf("\n")
fmt.Printf("Options:\n")
flag.PrintDefaults()
@@ -69,6 +83,8 @@ func main() {
build(args[1:])
case "run":
run(args[1:])
case "version":
version()
case "help":
flag.Usage()
default: