From 8df0e5aa7d4dc43b1384d91a820c9a748ccbea6b Mon Sep 17 00:00:00 2001
From: Ben Burwell <ben@benburwell.com>
Date: Tue, 13 Aug 2019 12:24:10 -0400
Subject: initial commit

---
 apply.go | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 apply.go

(limited to 'apply.go')

diff --git a/apply.go b/apply.go
new file mode 100644
index 0000000..7ea5bf9
--- /dev/null
+++ b/apply.go
@@ -0,0 +1,77 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"text/template"
+)
+
+func apply(args []string) error {
+	if len(args) != 0 {
+		return applyFiles(args)
+	}
+	names, err := getFileNames()
+	if err != nil {
+		return err
+	}
+	return applyFiles(names)
+}
+
+func applyFiles(names []string) error {
+	for _, name := range names {
+		fmt.Printf("applying %s\n", name)
+		if err := applyFile(name); err != nil {
+			return fmt.Errorf("could not apply %s: %v", name, err)
+		}
+	}
+	return nil
+}
+
+func applyFile(name string) error {
+	src := filepath.Join(base, "templates", name)
+	t, err := template.New(filepath.Base(name)).Funcs(buildFuncMap()).ParseFiles(src)
+	if err != nil {
+		return fmt.Errorf("could not build template: %v", err)
+	}
+	data, err := getTemplateData()
+	if err != nil {
+		return err
+	}
+	d := filepath.Join(dest, name)
+	if err = os.MkdirAll(filepath.Dir(d), 0700); err != nil {
+		return err
+	}
+	out, err := os.OpenFile(d, os.O_CREATE|os.O_WRONLY, 0600)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+	if err = t.Execute(out, data); err != nil {
+		return fmt.Errorf("could not execute template: %v", err)
+	}
+	return nil
+}
+
+func getFileNames() ([]string, error) {
+	var names []string
+	d := filepath.Join(base, "templates")
+	err := filepath.Walk(d, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if info.IsDir() {
+			return nil
+		}
+		name, err := filepath.Rel(d, path)
+		if err != nil {
+			return err
+		}
+		names = append(names, name)
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	return names, nil
+}
-- 
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