/
main.go
71 lines (56 loc) · 1.53 KB
/
main.go
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package main
import (
"fmt"
"go/ast"
"go/parser"
"go/token"
"io"
"os"
"github.com/alecthomas/kingpin"
)
var (
inputFile = kingpin.Arg("source", "Input source file.").Required().String()
outputFile = kingpin.Flag("output", "Where the generated code will be written.").Short('o').String()
packageName = kingpin.Flag("package", "The output package name.").Short('p').Required().String()
interfaceName = kingpin.Flag("interface", "The name of the interface that will be wrapped.").Short('i').Required().String()
constructors = kingpin.Flag("constructor", "The name of a constructor that will be wrapped.").Short('c').Strings()
)
func main() {
var err error
kingpin.Parse()
parsed, err := parseFile(*inputFile)
fatalError(err)
writer := NewAgentWriter(*interfaceName, *packageName, parsed)
var out io.Writer
if *outputFile == "" {
out = os.Stdout
} else {
out, err = os.Create(*outputFile)
fatalError(err)
}
WriteCodeGenerationWarning(out)
writer.WritePackageName(out)
WriteLibImport(out)
writer.WriteAgentType(out)
writer.WriteAgentMethods(out)
writer.WriteAgentControl(out)
writer.WriteRunLoop(out)
for _, constructor := range *constructors {
writer.WriteConstructor(out, constructor)
}
}
func fatalError(err error) {
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func parseFile(filename string) (*ast.File, error) {
var parsed *ast.File
fset := token.NewFileSet()
parsed, err := parser.ParseFile(fset, filename, nil, 0)
if err != nil {
return nil, err
}
return parsed, nil
}