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|
package main
import (
"errors"
"flag"
"fmt"
"os"
"text/template"
"github.com/fcuny/world/internal/version"
"github.com/fcuny/world/pkg/flake/lock"
)
const usage = `Usage:
flake-info [flake.lock]
Options:
-v, --version Print version information
-h, --help Print this message
`
const tmplInput = ` • repository: {{ .Locked.Repository }}
• updated on: {{ .Locked.LastModifiedRFC3339 }}
`
func main() {
flag.Usage = func() { fmt.Fprintf(os.Stderr, "%s\n", usage) }
var (
flakeLockPath string
versionFlag bool
)
flag.StringVar(&flakeLockPath, "flake-lock", "flake.lock", "path to the flake lock file")
flag.BoolVar(&versionFlag, "version", false, "Print version information")
flag.BoolVar(&versionFlag, "v", false, "Print version information")
flag.Parse()
if versionFlag {
information := version.VersionAndBuildInfo()
fmt.Println(information)
return
}
if _, err := os.Stat(flakeLockPath); err != nil {
if errors.Is(err, os.ErrNotExist) {
fmt.Fprintf(os.Stderr, "%s does not exists\n", flakeLockPath)
} else {
fmt.Fprintf(os.Stderr, "failed to check if %s exists: %v\n", flakeLockPath, err)
}
os.Exit(1)
}
lock, err := lock.New(flakeLockPath)
if err != nil {
fmt.Fprintf(os.Stderr, "failed to parse the lockfile for %s: %+v\n", flakeLockPath, err)
os.Exit(1)
}
for nodeName, node := range lock.Nodes {
tmpl, err := template.New("tmpl").Parse(tmplInput)
if err != nil {
panic(err)
}
fmt.Printf("%s\n", nodeName)
err = tmpl.Execute(os.Stdout, node)
if err != nil {
panic(err)
}
}
}
|
