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coroc: print version on -v,--version #89

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merged 1 commit into from
Sep 27, 2023
Merged

coroc: print version on -v,--version #89

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34 changes: 31 additions & 3 deletions compiler/cmd/coroc/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ import (
"flag"
"fmt"
"os"
"runtime/debug"

"github.com/stealthrocket/coroutine/compiler"
)
Expand All @@ -15,9 +16,8 @@ USAGE:
coroc [OPTIONS] [PATH]

OPTIONS:
--output <FILENAME> Name of the Go file to generate in each package

-h, --help Show this help information
-h, --help Show this help information
-v, --version Show the compiler version
`

func main() {
Expand All @@ -29,8 +29,18 @@ func main() {

func run() error {
flag.Usage = func() { println(usage[1:]) }

var showVersion bool
flag.BoolVar(&showVersion, "v", false, "")
flag.BoolVar(&showVersion, "version", false, "")

flag.Parse()

if showVersion {
fmt.Println(version())
return nil
}

path := flag.Arg(0)
if path == "" {
// If the compiler was invoked via go generate, the GOFILE
Expand All @@ -47,3 +57,21 @@ func run() error {

return compiler.Compile(path)
}

func version() (version string) {
version = "devel"
if info, ok := debug.ReadBuildInfo(); ok {
switch info.Main.Version {
case "":
case "(devel)":
default:
version = info.Main.Version
}
for _, setting := range info.Settings {
if setting.Key == "vcs.revision" {
version += " " + setting.Value
}
}
}
return
}