Work with local repository

go.mod

@@ -0,0 +1,5 @@
+module github.com/HardDie/myTldr
+
+go 1.16
+
+require github.com/fatih/color v1.10.0

go.sum

@@ -0,0 +1,9 @@
+github.com/fatih/color v1.10.0 h1:s36xzo75JdqLaaWoiEHk767eHiwo0598uUxyfiPkDsg=
+github.com/fatih/color v1.10.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
+github.com/mattn/go-colorable v0.1.8 h1:c1ghPdyEDarC70ftn0y+A/Ee++9zz8ljHG1b13eJ0s8=
+github.com/mattn/go-colorable v0.1.8/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
+github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
+github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae h1:/WDfKMnPU+m5M4xB+6x4kaepxRw6jWvR5iDRdvjHgy8=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

list.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+)
+
+func printList(source, language string) (commands []string) {
+	path := buildLocalPath(source, language)
+	err := filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
+		if info.IsDir() {
+			return nil
+		}
+		commands = append(commands, strings.ReplaceAll(info.Name(), ".md", ""))
+		return nil
+	})
+	if err != nil {
+		log.Fatal(err.Error())
+		os.Exit(1)
+	}
+	sort.Strings(commands)
+	return
+}

local.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"io/ioutil"
+	"os"
+	"os/user"
+	"strings"
+)
+
+const (
+	FilesDefaultPath = ".my_scripts/.tldr"
+)
+
+func getLocalPath() string {
+	user, err := user.Current()
+	if err != nil {
+		// Application can't continue
+		os.Exit(1)
+	}
+	return user.HomeDir + "/" + FilesDefaultPath
+}
+
+func buildLocalPath(source, language string) string {
+	folder := "pages"
+	if language != "en" {
+		folder += "." + language
+	}
+	return source + "/" + folder
+}
+
+func checkLocal(source, language string, name string) (page []string, err error) {
+	fileName := buildLocalPath(source, language) + "/" + name + ".md"
+	data, err := ioutil.ReadFile(fileName)
+	if err != nil {
+		return
+	}
+	page = strings.Split(string(data), "\n")
+	return
+}

main.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"os"
+)
+
+func main() {
+	source, language, err := handleFlags()
+	if err != nil {
+		return
+	}
+
+	command := flag.Args()[0]
+	page, err := checkLocal(source, language, command)
+	if err == nil {
+		fmt.Println(output(page))
+		return
+	}
+
+	fmt.Printf("`%s` documentation is not available. Consider contributing Pull Request to https://github.com/tldr-pages/tldr\n", command)
+}
+
+func handleFlags() (source, language string, err error) {
+	fVersion := flag.Bool("version", false, "show program's version number and exit")
+	fUpdateCache := flag.Bool("update_cache", false, "Update the local cache of pages and exit")
+	fPlatform := flag.String("platform", "linux", "Override the operating system [linux, osx, sunos, windows, common]")
+	fList := flag.Bool("list", false, "List all available commands for operating system")
+	fSource := flag.String("source", getLocalPath(), "Override the default page source")
+	fLanguage := flag.String("language", "en", "Override the default language")
+	flag.Usage = func() {
+		fmt.Printf("usage: %s [options] command\n\n", os.Args[0])
+		fmt.Println("Go command line client for tldr\n")
+		fmt.Println("optional arguments:")
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+
+	_ = fUpdateCache
+	_ = fPlatform
+	_ = fList
+
+	switch {
+	case *fVersion:
+		fmt.Println(getVersion())
+		os.Exit(0)
+	case *fList:
+		fmt.Printf("%q\n", printList(*fSource, *fLanguage))
+		os.Exit(0)
+	}
+
+	source = *fSource
+	language = *fLanguage
+	if len(flag.Args()) != 1 {
+		flag.Usage()
+		err = errors.New("not enough arguments")
+		return
+	}
+	return
+}

output.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"regexp"
+	"strings"
+
+	"github.com/fatih/color"
+)
+
+const (
+	LeadingSpaceNum = 2
+)
+
+var (
+	WhiteBoldString = color.New(color.FgWhite, color.Bold).SprintFunc()
+	WhiteString     = color.WhiteString
+	GreenString     = color.GreenString
+	RedString       = color.RedString
+
+	LeadingSpace = strings.Repeat(" ", LeadingSpaceNum)
+)
+
+func output(page []string) (rendered string) {
+	re1 := regexp.MustCompile("{{")
+	re2 := regexp.MustCompile("}}")
+
+	rendered += "\n"
+	for _, line := range page {
+		switch {
+		case len(line) == 0:
+			continue
+		case line[0] == '#':
+			rendered += LeadingSpace + WhiteBoldString(strings.ReplaceAll(line, "#", "")) + "\n\n"
+		case line[0] == '>':
+			rendered += LeadingSpace + WhiteString(strings.ReplaceAll(strings.ReplaceAll(line, ">", ""), "<", "")) + "\n"
+		case line[0] == '-':
+			rendered += "\n" + LeadingSpace + GreenString(line) + "\n"
+		case line[0] == '`':
+			line = line[1 : len(line)-1]
+			res := re1.ReplaceAllString(line, "\n{{")
+			res = re2.ReplaceAllString(res, "}}\n")
+			rendered += LeadingSpace + LeadingSpace
+			for _, item := range strings.Split(res, "\n") {
+				if len(item) == 0 {
+					rendered += " "
+				} else if item[0] == '{' {
+					// If argument, print without color
+					rendered += item[2 : len(item)-2]
+				} else {
+					rendered += RedString(item)
+				}
+			}
+			rendered += "\n"
+		}
+	}
+	rendered += "\n"
+	return
+}

version.go

@@ -0,0 +1,9 @@
+package main
+
+var (
+	VERSION = "0.1"
+)
+
+func getVersion() string {
+	return "myTldr " + VERSION
+}