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package file
import (
"bytes"
"fmt"
"os"
"strings"
"text/template"
)
func resolveContent(param, targetPath string) ([]byte, error) {
var content []byte
var err error
if strings.HasPrefix(param, "source://") {
sourcePath := strings.TrimPrefix(param, "source://")
content, err = os.ReadFile(sourcePath)
if err != nil {
return nil, fmt.Errorf("failed to read source file %s: %w", sourcePath, err)
}
} else {
content = []byte(param)
}
if strings.HasSuffix(targetPath, ".tmpl") || (strings.HasPrefix(param, "source://") && strings.HasSuffix(strings.TrimPrefix(param, "source://"), ".tmpl")) {
return applyTemplate(content, param)
}
return content, nil
}
func applyTemplate(content []byte, param string) ([]byte, error) {
data := make(map[string]string)
for _, env := range os.Environ() {
pair := strings.SplitN(env, "=", 2)
if len(pair) == 2 {
data[pair[0]] = pair[1]
}
}
data["Param"] = param
tmpl, err := template.New("resource").Parse(string(content))
if err != nil {
return nil, fmt.Errorf("template parse error: %w", err)
}
var buf bytes.Buffer
if err := tmpl.Execute(&buf, data); err != nil {
return nil, fmt.Errorf("template execute error: %w", err)
}
return buf.Bytes(), nil
}
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