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///usr/bin/env go run "$0" "$@"; exit $!
// SPDX-FileCopyrightText: 2018 Stefan Majewsky <majewsky@gmx.net>
// SPDX-License-Identifier: Apache-2.0
package main
import (
"encoding/json"
"fmt"
"io"
"os"
"strings"
"text/template"
)
func main() {
input, err := io.ReadAll(os.Stdin)
failIfError(err)
sections := strings.SplitN(string(input), "\n---\n", 2)
if len(sections) != 2 {
fail("missing separator between data and template")
}
dataStr, templateStr := sections[0], sections[1]
data := make(map[string]any)
failIfError(json.Unmarshal([]byte(dataStr), &data))
tmpl, err := template.New("tmpl").Parse(templateStr)
failIfError(err)
failIfError(tmpl.Execute(os.Stdout, data))
}
func failIfError(err error) {
if err != nil {
fail(err.Error())
}
}
func fail(msg string, args ...any) {
if len(args) > 0 {
msg = fmt.Sprintf(msg, args...)
}
fmt.Fprintln(os.Stderr, msg)
os.Exit(1)
}
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