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render.go
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render.go
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package main
import (
"io"
"os"
"path/filepath"
"strings"
"text/template"
"github.com/Masterminds/sprig/v3"
)
func renderToStdout(templateFile string, input InputMap) error {
return renderWithWriter(os.Stdout, templateFile, input)
}
func renderToFile(templateFile string, input InputMap, dest string) error {
f, err := os.Create(dest)
if err != nil {
return err
}
defer f.Close()
return renderWithWriter(f, templateFile, input)
}
func renderWithWriter(w io.Writer, templateFile string, input InputMap) error {
templateData, err := os.ReadFile(templateFile)
if err != nil {
panic(err)
}
tmpl, err := template.New("template").Funcs(execFuncs()).Funcs(sprig.FuncMap()).Parse(string(templateData))
if err != nil {
panic(err)
}
if err := tmpl.Execute(w, input); err != nil {
panic(err)
}
return nil
}
func renderOrCopy(srcFile, destPath string, templateExts []string, input InputMap) error {
isTemplate := false
for _, ext := range templateExts {
if strings.HasSuffix(destPath, ext) {
isTemplate = true
destPath = strings.TrimSuffix(destPath, ext)
break
}
}
// Write the rendered content to the destination directory
if err := os.MkdirAll(filepath.Dir(destPath), 0o755); err != nil {
return err
}
if isTemplate {
return renderToFile(srcFile, input, destPath)
} else {
// Copy non-template files directly
return copyFile(srcFile, destPath)
}
}
// copyFile copies a file from src to dst
func copyFile(src, dst string) error {
sourceFile, err := os.Open(src)
if err != nil {
return err
}
defer sourceFile.Close()
destinationFile, err := os.Create(dst)
if err != nil {
return err
}
defer destinationFile.Close()
_, err = io.Copy(destinationFile, sourceFile)
return err
}