/
cli.go
66 lines (60 loc) · 1.61 KB
/
cli.go
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package cli
import (
"flag"
"fmt"
"go/parser"
"go/token"
"os"
"strings"
"github.com/jussi-kalliokoski/gostringenum/internal/codegen"
"github.com/jussi-kalliokoski/gostringenum/internal/gostringenum"
)
var flagTestFile = flag.Bool("test-file", false, "Generates a _test.go to support the implementation.")
// Run the CLI program.
func Run() {
// ignore -- flag from go run.
if len(os.Args) > 1 && os.Args[1] == "--" {
os.Args = os.Args[:1+copy(os.Args[1:], os.Args[2:])]
}
fmt.Println(os.Args)
flag.Parse()
args := flag.Args()
if len(args) != 3 {
help()
}
directory, typeName, filename := args[0], args[1], args[2]
fileSet := token.NewFileSet()
pkgs, err := parser.ParseDir(fileSet, directory, nil, 0)
if err != nil {
panic(err)
}
pkgPath, err := codegen.GetImportPath(directory)
if err != nil {
panic(err)
}
if *flagTestFile {
implementationFile, testFile := gostringenum.GenerateWithTestFile(fileSet, pkgs, pkgPath, typeName)
if err = codegen.WriteASTFile(filename, implementationFile); err != nil {
panic(err)
}
testFilename := strings.TrimSuffix(filename, ".go") + "_test.go"
if err = codegen.WriteASTFile(testFilename, testFile); err != nil {
panic(err)
}
} else {
implementationFile := gostringenum.Generate(fileSet, pkgs, pkgPath, typeName)
if err = codegen.WriteASTFile(filename, implementationFile); err != nil {
panic(err)
}
}
}
func help() {
fmt.Println(strings.TrimSpace(`
Usage:
gostringenum [flags] <directory> <name_of_type> <filename>
Flags:
--help Show this message.
--test-file Generates a _test.go to support the implementation.
`))
os.Exit(1)
}