ref #2 change cli library to ogier/pflag.

Gopkg.toml

@@ -26,8 +26,8 @@
 
 
 [[constraint]]
-  name = "github.com/urfave/cli"
-  version = "1.20.0"
+  name = "github.com/ogier/pflag"
+  version = "0.0.1"
 
 [prune]
   go-tests = true

Makefile

@@ -1,6 +1,6 @@
 GO=go
 NAME := uniq2
-VERSION := 0.2.0
+VERSION := 1.0.0
 REVISION := $(shell git rev-parse --short HEAD)
 LDFLAGS := -X 'main.version=$(VERSION)'
 	-X 'main.revision=$(REVISION)'
@@ -21,6 +21,9 @@ setup: deps update_version
 	git submodule update --init
 
 update_version:
+	@for i in README.md docs/content/_index.md; do\
+	    sed -e 's!Version-[0-9.]*-yellowgreen!Version-${VERSION}-yellowgreen!g' -e 's!tag/v[0-9.]*!tag/v${VERSION}!g' $$i > a ; mv a $$i; \
+	done
 	@sed 's/const VERSION = .*/const VERSION = "${VERSION}"/g' cmd/uniq2/main.go > a
 	@mv a cmd/uniq2/main.go
 	@echo "Replace version to \"${VERSION}\""

README.md

@@ -3,7 +3,7 @@
 [![codebeat badge](https://codebeat.co/badges/855266ea-99d4-4d80-ac43-81a1712f0f90)](https://codebeat.co/projects/github-com-tamada-uniq2-master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/tamada/uniq2)](https://goreportcard.com/report/github.com/tamada/uniq2)
 [![License](https://img.shields.io/badge/License-WTFPL-blue.svg)](https://github.com/tamada/uniq2/blob/master/LICENSE)
-[![Version](https://img.shields.io/badge/Version-0.1.0-yellowgreen.svg)](https://github.com/tamada/uniq2/releases/tag/v0.1.0)
+[![Version](https://img.shields.io/badge/Version-1.0.0-yellowgreen.svg)](https://github.com/tamada/uniq2/releases/tag/v1.0.0)
 
 # uniq2
 
@@ -17,12 +17,38 @@ We want to delete not continuous duplicated lines with remaining the order.
 
 ## Install
 
+### Install by Homebrew
+
+Simply type the following commands.
+
+```sh
+$ brew tap tamada/brew
+$ brew install uniq2
+```
+
+### Install by Go
+
 Simply type the following command.
 
 ```sh
 $ go get github.com/tamada/uniq2
 ```
 
+## Usage
+
+```
+uniq2 [OPTIONS] [INPUT [OUTPUT]]
+OPTIONS
+    -a, --adjacent        delete only adjacent duplicated lines.
+    -d, --delete-lines    only prints deleted lines.
+    -i, --ignore-case     case sensitive.
+    -h, --help            print this message.
+
+INPUT                     gives file name of input.  If argument is single dash ('-')
+                          or absent, the program read strings from stdin.
+OUTPUT                    represents the destination.
+```
+
 ## License
 
 [WTFPL](https://github.com/tamada/uniq2/blob/master/LICENSE)

cmd/uniq2/main.go

@@ -4,98 +4,60 @@ import (
 	"fmt"
 	"os"
 
+	flag "github.com/ogier/pflag"
 	"github.com/tamada/uniq2/lib"
-	"github.com/urfave/cli"
 )
 
-const VERSION = "0.2.0"
+const VERSION = "1.0.0"
 
-func printHelp(app *cli.App) {
-	fmt.Printf(`%s
+func printHelp(appName string) {
+	fmt.Printf(`%s [OPTIONS] [INPUT [OUTPUT]]
 OPTIONS
     -a, --adjacent        delete only adjacent duplicated lines.
-    -c, --show-counts     show counts of deleted lines.
     -d, --delete-lines    only prints deleted lines.
     -i, --ignore-case     case sensitive.
     -h, --help            print this message.
 
 INPUT                     gives file name of input.  If argument is single dash ('-')
                           or absent, the program read strings from stdin.
 OUTPUT                    represents the destination.
-`, app.Usage)
+`, appName)
 }
 
-func buildFlags() []cli.Flag {
-	return []cli.Flag{
-		cli.BoolFlag{
-			Name:  "adjacent, a",
-			Usage: "delete only adjacent duplicated lines.",
-		},
-		cli.BoolFlag{
-			Name:  "show-counts, c",
-			Usage: "show counts of deleted lines.",
-		},
-		cli.BoolFlag{
-			Name:  "delete-lines, d",
-			Usage: "only prints deleted lines.",
-		},
-		cli.BoolFlag{
-			Name:  "ignore-case, i",
-			Usage: "case sensitive",
-		},
-	}
-}
-
-func constructApp() *cli.App {
-	var app = cli.NewApp()
-	app.Name = "uniq2"
-	app.Usage = "Eliminates duplicated lines"
-	app.UsageText = "uniq2 [OPTIONS] [INPUT [OUTPUT]]"
-	app.Version = VERSION
-	app.Flags = buildFlags()
-	app.Action = func(c *cli.Context) error {
-		return action(app, c)
-	}
-	return app
-}
-
-func parseOptions(c *cli.Context) *lib.Options {
-	return &lib.Options{
-		Adjacent:    c.Bool("adjacent"),
-		ShowCounts:  c.Bool("show-counts"),
-		DeleteLines: c.Bool("delete-lines"),
-		IgnoreCase:  c.Bool("ignore-case"),
-	}
-}
-
-func perform(args *lib.Arguments) error {
+func perform(flags *flag.FlagSet, opts *lib.Options) int {
+	var args, err = lib.NewArguments(opts, flags.Args()[1:])
 	defer args.Close()
-	return args.Perform()
-}
-
-func action(app *cli.App, c *cli.Context) error {
-	var options = parseOptions(c)
-	if c.Bool("help") {
-		printHelp(app)
-		return nil
+	if err == nil {
+		err = args.Perform()
 	}
-	var args, err = lib.NewArguments(options, c.Args())
 	if err != nil {
-		return err
+		fmt.Println(err.Error())
+		return 1
 	}
-	return perform(args)
+	return 0
 }
 
 func goMain() int {
-	var app = constructApp()
-	var err = app.Run(os.Args)
-	if err != nil {
-		fmt.Println(err.Error())
-		return 1
+	var flags, opts = buildFlagSet()
+	var err = flags.Parse(os.Args)
+	if err == nil {
+		return perform(flags, opts)
 	}
+	fmt.Println(err.Error())
+
 	return 0
 }
 
+func buildFlagSet() (*flag.FlagSet, *lib.Options) {
+	var opts = lib.Options{}
+	var flags = flag.NewFlagSet("uniq2", flag.ContinueOnError)
+	flags.Usage = func() { printHelp("uniq2") }
+	flags.BoolVarP(&opts.Adjacent, "adjacent", "a", false, "delete only the adjacent duplicate lines")
+	flags.BoolVarP(&opts.DeleteLines, "delete-lines", "d", false, "only prints deleted lines")
+	flags.BoolVarP(&opts.IgnoreCase, "ignore-case", "i", false, "case sensitive")
+	return flags, &opts
+}
+
 func main() {
 	// separates main function in order to run defers before exit.
 	var exitStatus = goMain()

docs/config.toml

@@ -11,7 +11,7 @@ pygmentsStyle = "pygments"
 
 [params]
     project_name = "uniq2"
-    project_tagline = "Eliminates duplicate lines"
+    project_tagline = "Deletes duplicate lines"
     dateFormat = "2006-01-02"
 
     footer = "[![GitHub](https://img.shields.io/badge/GitHub-tamada/uniq2-blueviolet.svg?logo=github)](https://github.com/tamada/uniq2) Made with [Hugo](https://gohugo.io/). Theme by [Cayman](https://github.com/zwbetz-gh/cayman-hugo-theme). Deployed to [GitHub Pages](https://pages.github.com/)."
@@ -24,8 +24,8 @@ pygmentsStyle = "pygments"
         url = "/"
         weight = 1
     [[menu.nav]]
-        name = "Utilities"
-        url = "/utils/"
+        name = "Demo"
+        url = "/demo/"
         weight = 2
     [[menu.nav]]
         name = "About"

docs/content/_index.md

@@ -7,7 +7,7 @@ title: uniq2
 [![codebeat badge](https://codebeat.co/badges/855266ea-99d4-4d80-ac43-81a1712f0f90)](https://codebeat.co/projects/github-com-tamada-uniq2-master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/tamada/uniq2)](https://goreportcard.com/report/github.com/tamada/uniq2)
 [![License](https://img.shields.io/badge/License-WTFPL-blue.svg)](https://github.com/tamada/uniq2/blob/master/LICENSE)
-[![Version](https://img.shields.io/badge/Version-0.1.0-yellowgreen.svg)](https://github.com/tamada/uniq2/releases/tag/v0.1.0)
+[![Version](https://img.shields.io/badge/Version-1.0.0-yellowgreen.svg)](https://github.com/tamada/uniq2/releases/tag/v1.0.0)
 
 ## Description
 

docs/content/demo.md

@@ -0,0 +1,49 @@
+---
+title: Demo
+---
+
+## Demo
+
+```sh
+$ cat -n testdata/test1.txt
+1	a1
+2	a1  # <- is the duplicate of the previous line.
+3	a2
+4	a2  # <- is the duplicate of the previous line.
+5	a3
+6	a4
+7	a1  # <- is the duplicate of the first line.
+8	A1
+$ uniq testdata/test1.txt
+a1
+a2
+a3
+a4
+A1
+$ uniq -a testdata/test1.txt  # same result as uniq command.
+a1
+a2
+a3
+a4
+a1  # <- this line is not deleted.
+A1
+$ uniq -i testdata/test1.txt # ignore case
+a1
+a2
+a3
+a4
+$ uniq -d testdata/test1.txt # print delete lines.
+a1
+a2
+a1
+```
+
+## Delete duplicate entries in PATH
+
+```sh
+export PATH=$(echo $PATH | tr : '\n' | uniq2 | paste -s -d : -)
+```
+
+* `tr : '\n'` replaces `:` to `\n` of data from STDIN,
+* `uniq2` deletes duplicate lines from the result of `tr`, and
+* `paste -s -d : -` joins given strings with `:`.