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generator.go
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generator.go
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// Package generator implements the processor of source code and generator of
// kallax models based on Go source code.
package generator
import (
"fmt"
"os"
"runtime/debug"
)
// Generator is in charge of generating files for packages.
type Generator struct {
filename string
}
// NewGenerator creates a new generator that can save on the given filename.
func NewGenerator(filename string) *Generator {
return &Generator{filename}
}
// Generate writes the file with the contents of the given package.
func (g *Generator) Generate(pkg *Package) error {
return g.writeFile(pkg)
}
func (g *Generator) writeFile(pkg *Package) (err error) {
file, err := os.Create(g.filename)
if err != nil {
return err
}
defer func() {
if r := recover(); r != nil {
fmt.Printf("kallax: PANIC during '%s' generation:\n%s\n\n", g.filename, r)
if err == nil {
err = fmt.Errorf(string(debug.Stack()))
}
}
file.Close()
if err != nil {
if os.Remove(g.filename) == nil {
fmt.Println("kallax: No file generated due to an occurred error:")
} else {
fmt.Printf("kallax: The autogenerated file '%s' could not be completed nor deleted due to an occurred error:\n", g.filename)
}
}
}()
return Base.Execute(file, pkg)
}