Add urfave_cli_no_docs build tag

.github/workflows/cli.yml

@@ -37,12 +37,18 @@ jobs:
       - name: vet
         run: go run internal/build/build.go vet
 
+      - name: test with tags
+        run: go run internal/build/build.go -tags urfave_cli_no_docs test
+
       - name: test
         run: go run internal/build/build.go test
 
       - name: check-binary-size
         run: go run internal/build/build.go check-binary-size
 
+      - name: check-binary-size with tags (informational only)
+        run: go run internal/build/build.go -tags urfave_cli_no_docs check-binary-size || true
+
       - name: Upload coverage to Codecov
         if: success() && matrix.go == '1.18.x' && matrix.os == 'ubuntu-latest'
         uses: codecov/codecov-action@v2

README.md

@@ -55,6 +55,16 @@ import (
 ...
 ```
 
+### Build tags
+
+You can use the following build tags:
+
+#### `urfave_cli_no_docs`
+
+When set, this removes `ToMarkdown` and `ToMan` methods, so your application
+won't be able to call those. This reduces the resulting binary size by about
+300-400 KB (measured using Go 1.18.1 on Linux/amd64), due to less dependencies.
+
 ### GOPATH
 
 Make sure your `PATH` includes the `$GOPATH/bin` directory so your commands can

docs.go

@@ -1,3 +1,6 @@
+//go:build !urfave_cli_no_docs
+// +build !urfave_cli_no_docs
+
 package cli
 
 import (

docs_test.go

@@ -1,138 +1,13 @@
+//go:build !urfave_cli_no_docs
+// +build !urfave_cli_no_docs
+
 package cli
 
 import (
-	"bytes"
 	"errors"
-	"io/ioutil"
 	"testing"
 )
 
-func testApp() *App {
-	app := newTestApp()
-	app.Name = "greet"
-	app.Flags = []Flag{
-		&StringFlag{
-			Name:      "socket",
-			Aliases:   []string{"s"},
-			Usage:     "some 'usage' text",
-			Value:     "value",
-			TakesFile: true,
-		},
-		&StringFlag{Name: "flag", Aliases: []string{"fl", "f"}},
-		&BoolFlag{
-			Name:    "another-flag",
-			Aliases: []string{"b"},
-			Usage:   "another usage text",
-		},
-		&BoolFlag{
-			Name:   "hidden-flag",
-			Hidden: true,
-		},
-	}
-	app.Commands = []*Command{{
-		Aliases: []string{"c"},
-		Flags: []Flag{
-			&StringFlag{
-				Name:      "flag",
-				Aliases:   []string{"fl", "f"},
-				TakesFile: true,
-			},
-			&BoolFlag{
-				Name:    "another-flag",
-				Aliases: []string{"b"},
-				Usage:   "another usage text",
-			},
-		},
-		Name:  "config",
-		Usage: "another usage test",
-		Subcommands: []*Command{{
-			Aliases: []string{"s", "ss"},
-			Flags: []Flag{
-				&StringFlag{Name: "sub-flag", Aliases: []string{"sub-fl", "s"}},
-				&BoolFlag{
-					Name:    "sub-command-flag",
-					Aliases: []string{"s"},
-					Usage:   "some usage text",
-				},
-			},
-			Name:  "sub-config",
-			Usage: "another usage test",
-		}},
-	}, {
-		Aliases: []string{"i", "in"},
-		Name:    "info",
-		Usage:   "retrieve generic information",
-	}, {
-		Name: "some-command",
-	}, {
-		Name:   "hidden-command",
-		Hidden: true,
-	}, {
-		Aliases: []string{"u"},
-		Flags: []Flag{
-			&StringFlag{
-				Name:      "flag",
-				Aliases:   []string{"fl", "f"},
-				TakesFile: true,
-			},
-			&BoolFlag{
-				Name:    "another-flag",
-				Aliases: []string{"b"},
-				Usage:   "another usage text",
-			},
-		},
-		Name:  "usage",
-		Usage: "standard usage text",
-		UsageText: `
-Usage for the usage text
-- formatted:  Based on the specified ConfigMap and summon secrets.yml
-- list:       Inspect the environment for a specific process running on a Pod
-- for_effect: Compare 'namespace' environment with 'local'
-
-` + "```" + `
-func() { ... }
-` + "```" + `
-
-Should be a part of the same code block
-`,
-		Subcommands: []*Command{{
-			Aliases: []string{"su"},
-			Flags: []Flag{
-				&BoolFlag{
-					Name:    "sub-command-flag",
-					Aliases: []string{"s"},
-					Usage:   "some usage text",
-				},
-				&StringFlag{
-					Name:   "sub-command-hidden-flag",
-					Usage:  "some hidden usage text",
-					Hidden: true,
-				},
-			},
-			Name:      "sub-usage",
-			Usage:     "standard usage text",
-			UsageText: "Single line of UsageText",
-		}},
-	}}
-	app.UsageText = "app [first_arg] [second_arg]"
-	app.Description = `Description of the application.`
-	app.Usage = "Some app"
-	app.Authors = []*Author{
-		{Name: "Harrison", Email: "harrison@lolwut.com"},
-		{Name: "Oliver Allen", Email: "oliver@toyshop.com"},
-	}
-	return app
-}
-
-func expectFileContent(t *testing.T, file, got string) {
-	data, err := ioutil.ReadFile(file)
-	// Ignore windows line endings
-	// TODO: Replace with bytes.ReplaceAll when support for Go 1.11 is dropped
-	data = bytes.Replace(data, []byte("\r\n"), []byte("\n"), -1)
-	expect(t, err, nil)
-	expect(t, got, string(data))
-}
-
 func TestToMarkdownFull(t *testing.T) {
 	// Given
 	app := testApp()

fish_test.go

@@ -1,6 +1,8 @@
 package cli
 
 import (
+	"bytes"
+	"io/ioutil"
 	"testing"
 )
 
@@ -19,3 +21,124 @@ func TestFishCompletion(t *testing.T) {
 	expect(t, err, nil)
 	expectFileContent(t, "testdata/expected-fish-full.fish", res)
 }
+
+func testApp() *App {
+	app := newTestApp()
+	app.Name = "greet"
+	app.Flags = []Flag{
+		&StringFlag{
+			Name:      "socket",
+			Aliases:   []string{"s"},
+			Usage:     "some 'usage' text",
+			Value:     "value",
+			TakesFile: true,
+		},
+		&StringFlag{Name: "flag", Aliases: []string{"fl", "f"}},
+		&BoolFlag{
+			Name:    "another-flag",
+			Aliases: []string{"b"},
+			Usage:   "another usage text",
+		},
+		&BoolFlag{
+			Name:   "hidden-flag",
+			Hidden: true,
+		},
+	}
+	app.Commands = []*Command{{
+		Aliases: []string{"c"},
+		Flags: []Flag{
+			&StringFlag{
+				Name:      "flag",
+				Aliases:   []string{"fl", "f"},
+				TakesFile: true,
+			},
+			&BoolFlag{
+				Name:    "another-flag",
+				Aliases: []string{"b"},
+				Usage:   "another usage text",
+			},
+		},
+		Name:  "config",
+		Usage: "another usage test",
+		Subcommands: []*Command{{
+			Aliases: []string{"s", "ss"},
+			Flags: []Flag{
+				&StringFlag{Name: "sub-flag", Aliases: []string{"sub-fl", "s"}},
+				&BoolFlag{
+					Name:    "sub-command-flag",
+					Aliases: []string{"s"},
+					Usage:   "some usage text",
+				},
+			},
+			Name:  "sub-config",
+			Usage: "another usage test",
+		}},
+	}, {
+		Aliases: []string{"i", "in"},
+		Name:    "info",
+		Usage:   "retrieve generic information",
+	}, {
+		Name: "some-command",
+	}, {
+		Name:   "hidden-command",
+		Hidden: true,
+	}, {
+		Aliases: []string{"u"},
+		Flags: []Flag{
+			&StringFlag{
+				Name:      "flag",
+				Aliases:   []string{"fl", "f"},
+				TakesFile: true,
+			},
+			&BoolFlag{
+				Name:    "another-flag",
+				Aliases: []string{"b"},
+				Usage:   "another usage text",
+			},
+		},
+		Name:  "usage",
+		Usage: "standard usage text",
+		UsageText: `
+Usage for the usage text
+- formatted:  Based on the specified ConfigMap and summon secrets.yml
+- list:       Inspect the environment for a specific process running on a Pod
+- for_effect: Compare 'namespace' environment with 'local'
+
+` + "```" + `
+func() { ... }
+` + "```" + `
+
+Should be a part of the same code block
+`,
+		Subcommands: []*Command{{
+			Aliases: []string{"su"},
+			Flags: []Flag{
+				&BoolFlag{
+					Name:    "sub-command-flag",
+					Aliases: []string{"s"},
+					Usage:   "some usage text",
+				},
+			},
+			Name:      "sub-usage",
+			Usage:     "standard usage text",
+			UsageText: "Single line of UsageText",
+		}},
+	}}
+	app.UsageText = "app [first_arg] [second_arg]"
+	app.Description = `Description of the application.`
+	app.Usage = "Some app"
+	app.Authors = []*Author{
+		{Name: "Harrison", Email: "harrison@lolwut.com"},
+		{Name: "Oliver Allen", Email: "oliver@toyshop.com"},
+	}
+	return app
+}
+
+func expectFileContent(t *testing.T, file, got string) {
+	data, err := ioutil.ReadFile(file)
+	// Ignore windows line endings
+	// TODO: Replace with bytes.ReplaceAll when support for Go 1.11 is dropped
+	data = bytes.Replace(data, []byte("\r\n"), []byte("\n"), -1)
+	expect(t, err, nil)
+	expect(t, got, string(data))
+}

internal/build/build.go

@@ -46,6 +46,12 @@ func main() {
 			Action: checkBinarySizeActionFunc,
 		},
 	}
+	app.Flags = []cli.Flag{
+		&cli.StringFlag{
+			Name:  "tags",
+			Usage: "set build tags",
+		},
+	}
 
 	err := app.Run(os.Args)
 	if err != nil {
@@ -68,6 +74,8 @@ func VetActionFunc(_ *cli.Context) error {
 }
 
 func TestActionFunc(c *cli.Context) error {
+	tags := c.String("tags")
+
 	for _, pkg := range packages {
 		var packageName string
 
@@ -79,7 +87,7 @@ func TestActionFunc(c *cli.Context) error {
 
 		coverProfile := fmt.Sprintf("--coverprofile=%s.coverprofile", pkg)
 
-		err := runCmd("go", "test", "-v", coverProfile, packageName)
+		err := runCmd("go", "test", "-tags", tags, "-v", coverProfile, packageName)
 		if err != nil {
 			return err
 		}
@@ -201,14 +209,16 @@ func checkBinarySizeActionFunc(c *cli.Context) (err error) {
 		mbStringFormatter    = "%.1fMB"
 	)
 
+	tags := c.String("tags")
+
 	// get cli example size
-	cliSize, err := getSize(cliSourceFilePath, cliBuiltFilePath)
+	cliSize, err := getSize(cliSourceFilePath, cliBuiltFilePath, tags)
 	if err != nil {
 		return err
 	}
 
 	// get hello world size
-	helloSize, err := getSize(helloSourceFilePath, helloBuiltFilePath)
+	helloSize, err := getSize(helloSourceFilePath, helloBuiltFilePath, tags)
 	if err != nil {
 		return err
 	}
@@ -270,9 +280,9 @@ func checkBinarySizeActionFunc(c *cli.Context) (err error) {
 	return nil
 }
 
-func getSize(sourcePath string, builtPath string) (size int64, err error) {
+func getSize(sourcePath string, builtPath string, tags string) (size int64, err error) {
 	// build example binary
-	err = runCmd("go", "build", "-o", builtPath, "-ldflags", "-s -w", sourcePath)
+	err = runCmd("go", "build", "-tags", tags, "-o", builtPath, "-ldflags", "-s -w", sourcePath)
 	if err != nil {
 		fmt.Println("issue getting size for example binary")
 		return 0, err