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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package template_test

import (
	"io"
	"log"
	"os"
	"path/filepath"
	"text/template"
)

// templateFile defines the contents of a template to be stored in a file, for testing.
type templateFile struct {
	name     string
	contents string
}

func createTestDir(files []templateFile) string {
	dir, err := os.MkdirTemp("", "template")
	if err != nil {
		log.Fatal(err)
	}
	for _, file := range files {
		f, err := os.Create(filepath.Join(dir, file.name))
		if err != nil {
			log.Fatal(err)
		}
		defer f.Close()
		_, err = io.WriteString(f, file.contents)
		if err != nil {
			log.Fatal(err)
		}
	}
	return dir
}

// The following example is duplicated in text/template; keep them in sync.

// Here we demonstrate loading a set of templates from a directory.
func ExampleTemplate_glob() {
	// Here we create a temporary directory and populate it with our sample
	// template definition files; usually the template files would already
	// exist in some location known to the program.
	dir := createTestDir([]templateFile{
		// T0.tmpl is a plain template file that just invokes T1.
		{"T0.tmpl", `T0 invokes T1: ({{template "T1"}})`},
		// T1.tmpl defines a template, T1 that invokes T2.
		{"T1.tmpl", `{{define "T1"}}T1 invokes T2: ({{template "T2"}}){{end}}`},
		// T2.tmpl defines a template T2.
		{"T2.tmpl", `{{define "T2"}}This is T2{{end}}`},
	})
	// Clean up after the test; another quirk of running as an example.
	defer os.RemoveAll(dir)

// pattern is the glob pattern used to find all the template files.
	pattern := filepath.Join(dir, "*.tmpl")

// Here starts the example proper.
	// T0.tmpl is the first name matched, so it becomes the starting template,
	// the value returned by ParseGlob.
	tmpl := template.Must(template.ParseGlob(pattern))

err := tmpl.Execute(os.Stdout, nil)
	if err != nil {
		log.Fatalf("template execution: %s", err)
	}
	// Output:
	// T0 invokes T1: (T1 invokes T2: (This is T2))
}

// Here we demonstrate loading a set of templates from files in different directories
func ExampleTemplate_parsefiles() {
	// Here we create different temporary directories and populate them with our sample
	// template definition files; usually the template files would already
	// exist in some location known to the program.
	dir1 := createTestDir([]templateFile{
		// T1.tmpl is a plain template file that just invokes T2.
		{"T1.tmpl", `T1 invokes T2: ({{template "T2"}})`},
	})

dir2 := createTestDir([]templateFile{
		// T2.tmpl defines a template T2.
		{"T2.tmpl", `{{define "T2"}}This is T2{{end}}`},
	})

// Clean up after the test; another quirk of running as an example.
	defer func(dirs ...string) {
		for _, dir := range dirs {
			os.RemoveAll(dir)
		}
	}(dir1, dir2)

// Here starts the example proper.
	// Let's just parse only dir1/T0 and dir2/T2
	paths := []string{
		filepath.Join(dir1, "T1.tmpl"),
		filepath.Join(dir2, "T2.tmpl"),
	}
	tmpl := template.Must(template.ParseFiles(paths...))

err := tmpl.Execute(os.Stdout, nil)
	if err != nil {
		log.Fatalf("template execution: %s", err)
	}
	// Output:
	// T1 invokes T2: (This is T2)
}

// The following example is duplicated in text/template; keep them in sync.

// This example demonstrates one way to share some templates
// and use them in different contexts. In this variant we add multiple driver
// templates by hand to an existing bundle of templates.
func ExampleTemplate_helpers() {
	// Here we create a temporary directory and populate it with our sample
	// template definition files; usually the template files would already
	// exist in some location known to the program.
	dir := createTestDir([]templateFile{
		// T1.tmpl defines a template, T1 that invokes T2.
		{"T1.tmpl", `{{define "T1"}}T1 invokes T2: ({{template "T2"}}){{end}}`},
		// T2.tmpl defines a template T2.
		{"T2.tmpl", `{{define "T2"}}This is T2{{end}}`},
	})
	// Clean up after the test; another quirk of running as an example.
	defer os.RemoveAll(dir)

// pattern is the glob pattern used to find all the template files.
	pattern := filepath.Join(dir, "*.tmpl")

// Here starts the example proper.
	// Load the helpers.
	templates := template.Must(template.ParseGlob(pattern))
	// Add one driver template to the bunch; we do this with an explicit template definition.
	_, err := templates.Parse("{{define `driver1`}}Driver 1 calls T1: ({{template `T1`}})\n{{end}}")
	if err != nil {
		log.Fatal("parsing driver1: ", err)
	}
	// Add another driver template.
	_, err = templates.Parse("{{define `driver2`}}Driver 2 calls T2: ({{template `T2`}})\n{{end}}")
	if err != nil {
		log.Fatal("parsing driver2: ", err)
	}
	// We load all the templates before execution. This package does not require
	// that behavior but html/template's escaping does, so it's a good habit.
	err = templates.ExecuteTemplate(os.Stdout, "driver1", nil)
	if err != nil {
		log.Fatalf("driver1 execution: %s", err)
	}
	err = templates.ExecuteTemplate(os.Stdout, "driver2", nil)
	if err != nil {
		log.Fatalf("driver2 execution: %s", err)
	}
	// Output:
	// Driver 1 calls T1: (T1 invokes T2: (This is T2))
	// Driver 2 calls T2: (This is T2)
}

// The following example is duplicated in text/template; keep them in sync.

// This example demonstrates how to use one group of driver
// templates with distinct sets of helper templates.
func ExampleTemplate_share() {
	// Here we create a temporary directory and populate it with our sample
	// template definition files; usually the template files would already
	// exist in some location known to the program.
	dir := createTestDir([]templateFile{
		// T0.tmpl is a plain template file that just invokes T1.
		{"T0.tmpl", "T0 ({{.}} version) invokes T1: ({{template `T1`}})\n"},
		// T1.tmpl defines a template, T1 that invokes T2. Note T2 is not defined
		{"T1.tmpl", `{{define "T1"}}T1 invokes T2: ({{template "T2"}}){{end}}`},
	})
	// Clean up after the test; another quirk of running as an example.
	defer os.RemoveAll(dir)

// pattern is the glob pattern used to find all the template files.
	pattern := filepath.Join(dir, "*.tmpl")

// Here starts the example proper.
	// Load the drivers.
	drivers := template.Must(template.ParseGlob(pattern))

// We must define an implementation of the T2 template. First we clone
	// the drivers, then add a definition of T2 to the template name space.

// 1. Clone the helper set to create a new name space from which to run them.
	first, err := drivers.Clone()
	if err != nil {
		log.Fatal("cloning helpers: ", err)
	}
	// 2. Define T2, version A, and parse it.
	_, err = first.Parse("{{define `T2`}}T2, version A{{end}}")
	if err != nil {
		log.Fatal("parsing T2: ", err)
	}

// Now repeat the whole thing, using a different version of T2.
	// 1. Clone the drivers.
	second, err := drivers.Clone()
	if err != nil {
		log.Fatal("cloning drivers: ", err)
	}
	// 2. Define T2, version B, and parse it.
	_, err = second.Parse("{{define `T2`}}T2, version B{{end}}")
	if err != nil {
		log.Fatal("parsing T2: ", err)
	}

// Execute the templates in the reverse order to verify the
	// first is unaffected by the second.
	err = second.ExecuteTemplate(os.Stdout, "T0.tmpl", "second")
	if err != nil {
		log.Fatalf("second execution: %s", err)
	}
	err = first.ExecuteTemplate(os.Stdout, "T0.tmpl", "first")
	if err != nil {
		log.Fatalf("first: execution: %s", err)
	}

// Output:
	// T0 (second version) invokes T1: (T1 invokes T2: (T2, version B))
	// T0 (first version) invokes T1: (T1 invokes T2: (T2, version A))
}

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⬅ html 32 item

Nama	Tipe	Ukuran	Diubah	Aksi
📁testdata	dir	—	2024-02-02 18:09	📂 Buka
🔵attr.go	go	6.2 KB	2024-02-02 18:09	✏️ 👁️
🔵attr_string.go	go	719 B	2024-02-02 18:09	✏️ 👁️
🔵clone_test.go	go	8 KB	2024-02-02 18:09	✏️ 👁️
🔵content.go	go	6.2 KB	2024-02-02 18:09	✏️ 👁️
🔵content_test.go	go	13.5 KB	2024-02-02 18:09	✏️ 👁️
🔵context.go	go	9.4 KB	2024-02-02 18:09	✏️ 👁️
🔵css.go	go	7 KB	2024-02-02 18:09	✏️ 👁️
🔵css_test.go	go	6.9 KB	2024-02-02 18:09	✏️ 👁️
🔵delim_string.go	go	701 B	2024-02-02 18:09	✏️ 👁️
🔵doc.go	go	8 KB	2024-02-02 18:09	✏️ 👁️
🔵element_string.go	go	745 B	2024-02-02 18:09	✏️ 👁️
🔵error.go	go	9.3 KB	2024-02-02 18:09	✏️ 👁️
🔵escape.go	go	32.4 KB	2024-02-02 18:09	✏️ 👁️
🔵escape_test.go	go	56.2 KB	2024-02-02 18:09	✏️ 👁️
🔵example_test.go	go	3.9 KB	2024-02-02 18:09	✏️ 👁️
🔵examplefiles_test.go	go	7.5 KB	2024-02-02 18:09	✏️ 👁️
🔵exec_test.go	go	57.4 KB	2024-02-02 18:09	✏️ 👁️
🔵html.go	go	7.3 KB	2024-02-02 18:09	✏️ 👁️
🔵html_test.go	go	2.8 KB	2024-02-02 18:09	✏️ 👁️
🔵js.go	go	13.3 KB	2024-02-02 18:09	✏️ 👁️
🔵js_test.go	go	12 KB	2024-02-02 18:09	✏️ 👁️
🔵jsctx_string.go	go	635 B	2024-02-02 18:09	✏️ 👁️
🔵multi_test.go	go	8 KB	2024-02-02 18:09	✏️ 👁️
🔵state_string.go	go	1.7 KB	2024-02-02 18:09	✏️ 👁️
🔵template.go	go	16.9 KB	2024-02-02 18:09	✏️ 👁️
🔵template_test.go	go	6.2 KB	2024-02-02 18:09	✏️ 👁️
🔵transition.go	go	18.3 KB	2024-02-02 18:09	✏️ 👁️
🔵transition_test.go	go	1.7 KB	2024-02-02 18:09	✏️ 👁️
🔵url.go	go	6.6 KB	2024-02-02 18:09	✏️ 👁️
🔵url_test.go	go	3.9 KB	2024-02-02 18:09	✏️ 👁️
🔵urlpart_string.go	go	720 B	2024-02-02 18:09	✏️ 👁️

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