chore: Move command execution code to separate file

exec.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"os/exec"
+	"strings"
+)
+
+func (ctx TemplateContext) run(command string) (string, error) {
+	cmd := exec.Command("sh", "-c", command)
+	var stdout bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stdout
+	for k, v := range ctx {
+		cmd.Env = append(cmd.Env, k+"="+v)
+	}
+	err := cmd.Run()
+	if err != nil {
+		return "", errors.New(stdout.String())
+	}
+	return stdout.String(), nil
+}
+
+func (ctx TemplateContext) raw(command string) string {
+	out, err := ctx.run(command)
+	if err != nil {
+		fmt.Println(err)
+		return "error"
+	}
+	return strings.TrimSpace(out)
+}
+
+func (ctx TemplateContext) codeBlock(command string) string {
+	out, err := ctx.run(command)
+	if err != nil {
+		return fmt.Sprintf("> Failed to execute the command:\n> `%s`\n> %s\n", command, err.Error())
+	}
+	return fmt.Sprintf("\n```\n%s\n```\n", out)
+}
+
+func (ctx TemplateContext) inline(command string) string {
+	out, err := ctx.run(command)
+	if err != nil {
+		return fmt.Sprintf("`Failed to execute the command: '%s'. %s`", command, err.Error())
+	}
+	return fmt.Sprintf("`%s`", strings.Trim(out, "\n "))
+}

render.go

@@ -2,63 +2,12 @@ package main
 
 import (
 	"bytes"
-	"errors"
 	"fmt"
 	"io"
 	"os"
-	"os/exec"
-	"strings"
 	"text/template"
 )
 
-func (ctx TemplateContext) run(command string) (string, error) {
-	cmd := exec.Command("sh", "-c", command)
-	var stdout bytes.Buffer
-	cmd.Stdout = &stdout
-	cmd.Stderr = &stdout
-	for k, v := range ctx {
-		cmd.Env = append(cmd.Env, k+"="+v)
-	}
-	err := cmd.Run()
-	if err != nil {
-		return "", errors.New(stdout.String())
-	}
-	return stdout.String(), nil
-}
-
-func (ctx TemplateContext) raw(command string) string {
-	out, err := ctx.run(command)
-	if err != nil {
-		fmt.Println(err)
-		return "error"
-	}
-	return strings.TrimSpace(out)
-}
-
-func (ctx TemplateContext) codeBlock(command string) string {
-	out, err := ctx.run(command)
-	if err != nil {
-		return fmt.Sprintf("> Failed to execute the command:\n> `%s`\n> %s\n", command, err.Error())
-	}
-	return fmt.Sprintf("\n```\n%s\n```\n", out)
-}
-
-func (ctx TemplateContext) inline(command string) string {
-	out, err := ctx.run(command)
-	if err != nil {
-		return fmt.Sprintf("`Failed to execute the command: '%s'. %s`", command, err.Error())
-	}
-	return fmt.Sprintf("`%s`", strings.Trim(out, "\n "))
-}
-
-func (ctx TemplateContext) funcMap() template.FuncMap {
-	return template.FuncMap{
-		"sh":    ctx.inline,
-		"shell": ctx.codeBlock,
-		"raw":   ctx.raw,
-	}
-}
-
 func (ctx TemplateContext) render(tmpl string, output io.Writer) error {
 	t, err := template.New("foo").Funcs(ctx.funcMap()).Parse(tmpl)
 	if err != nil {
@@ -71,6 +20,14 @@ func (ctx TemplateContext) render(tmpl string, output io.Writer) error {
 	return nil
 }
 
+func (ctx TemplateContext) funcMap() template.FuncMap {
+	return template.FuncMap{
+		"sh":    ctx.inline,
+		"shell": ctx.codeBlock,
+		"raw":   ctx.raw,
+	}
+}
+
 func (ctx TemplateContext) OutputFile(meta TemplateMeta) (output io.WriteCloser, err error) {
 	if meta.Output == "" {
 		return os.Stdout, nil