mirror of
https://github.com/Luzifer/korvike.git
synced 2024-09-16 15:38:27 +00:00
Knut Ahlers
e8a8b2f83f
Breaking changes: - Remove function `b64decode`, use `b64dec` - Remove function `b64encode`, use `b64enc` - Remove default from `env`, use `env "MYVAR" | default "..."` - Remove function `hash`, use `sha1sum` / `sha256sum` / `sha512sum` - Function `now` returns `time.Time`, use `now | date "[format]"` - Function `split` now has reversed parameters `split <sep> <str>` Signed-off-by: Knut Ahlers <knut@ahlers.me>
105 lines
2.3 KiB
Go
105 lines
2.3 KiB
Go
package main
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import (
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"fmt"
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"io"
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"log"
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"os"
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"text/template"
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"github.com/Luzifer/go_helpers/v2/env"
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korvike "github.com/Luzifer/korvike/functions"
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"github.com/Luzifer/rconfig/v2"
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)
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var (
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cfg = struct {
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Input string `flag:"in,i" default:"-" description:"Source to read the template from ('-' = stdin)"`
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KeyPairs []string `flag:"key-value,v" default:"" description:"Key-value pairs to use in templating (-v key=value)"`
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Output string `flag:"out,o" default:"-" description:"Destination to write the output to ('-' = stdout)"`
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VersionAndExit bool `flag:"version" default:"false" description:"Prints current version and exits"`
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}{}
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version = "dev"
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)
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func initApp() (err error) {
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if err := rconfig.Parse(&cfg); err != nil {
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return fmt.Errorf("parsing CLI options: %w", err)
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}
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return nil
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}
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func openInput(f string) (io.Reader, error) {
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if f == "-" {
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return os.Stdin, nil
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}
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if _, err := os.Stat(f); err != nil {
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return nil, fmt.Errorf("finding file %q: %s", f, err)
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}
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r, err := os.Open(f) //#nosec G304 // Intended to use user-given file
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if err != nil {
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return nil, fmt.Errorf("opening file: %w", err)
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}
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return r, nil
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}
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func openOutput(f string) (io.Writer, error) {
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if f == "-" {
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return os.Stdout, nil
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}
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w, err := os.Create(f) //#nosec G304 // Intended to use user-given file
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if err != nil {
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return nil, fmt.Errorf("creating file: %w", err)
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}
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return w, nil
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}
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func main() {
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var err error
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if err = initApp(); err != nil {
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log.Fatalf("initializing app: %s", err)
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}
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if cfg.VersionAndExit {
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fmt.Printf("korvike %s\n", version) //nolint:forbidigo
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os.Exit(0)
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}
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in, err := openInput(cfg.Input)
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if err != nil {
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log.Fatalf("opening input: %s", err)
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}
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out, err := openOutput(cfg.Output)
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if err != nil {
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log.Fatalf("opening output: %s", err)
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}
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rawTpl, err := io.ReadAll(in)
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if err != nil {
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log.Fatalf("reading from input: %s", err)
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}
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tpl, err := template.New("in").Funcs(korvike.GetFunctionMap()).Parse(string(rawTpl))
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if err != nil {
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log.Fatalf("parsing template: %s", err)
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}
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vars := map[string]interface{}{}
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for k, v := range env.ListToMap(cfg.KeyPairs) {
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vars[k] = v
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}
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korvike.SetSubTemplateVariables(vars)
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if err := tpl.Execute(out, vars); err != nil {
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log.Fatalf("executing template: %s", err)
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}
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}
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