Add support for i18n in the cli (#676)

* add po message catalog implementation

* add po parser for i18n cmd

* add po merge function

* add command to generate en po file from source

* add command to update local po files with en catalog change

* add task to generate po files

* add locale option for i18n

* add dependencies for i18n

* add unit test for i18n

* add godoc to exported fields

* add rice box for i18n messages

* add readme for i18n module

* update README to add instruction to install go-rice

* remove warning log in case locale is not found

* add command to pull and push translation files from/to transifex

* remove unused import

* dont generate new rice file if there are no translation changes

* add copyright headers

* use 'tr' function call as indicator for translations

* adding documentation to pull,push translations and adding new languages

* push only the reference translation catalog

* add check on PR for updated catalog not commited

* push message catalog to transifex

* pull translations fro transifex weekly

* get locale identifier from diferent OSes

* get locale identifier from diferent OSes

* match locale algo

* add locale match test

* preserve LF in translation string unchanged

* init config before executing command

* create arduino cmd dynamically

* make all command init dynamically

* save all message occurrences in catalog

* add translatable cli usage template

* add messages for cli usage template

* remove standalone i18n message check

* add more i18n tests

* fix po parsing correctness and implement tests

* fix configuration path search tests

* update catalog command to find go files

* update catalog with new path

* fix docsgen command

* remove dependency on shell script for windows compat

* fix test workflow

* update setup-go to v2

* fail i18n:check task if catalog was not updated

* replace windows separator with forward slash

* use filepath function to translate windows paths

* only update en catalog

Author: hdiniz

Diff for: .github/workflows/i18n-nightly-push.yaml

@@ -0,0 +1,30 @@
+name: i18n-nightly-push
+
+on:
+  schedule:
+    # run every day at 1AM
+    - cron:  '0 1 * * *'
+
+jobs:
+  push-to-transifex:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '1.14'
+
+      - name: Install Taskfile
+        uses: Arduino/actions/setup-taskfile@master
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Run task i18n:push
+        run: task i18n:push
+        env:
+          TRANSIFEX_PROJECT: ${{ secrets.TRANSIFEX_PROJECT }}
+          TRANSIFEX_RESOURCE: ${{ secrets.TRANSIFEX_RESOURCE }}
+          TRANSIFEX_API_KEY: ${{ secrets.TRANSIFEX_API_KEY }}

Diff for: .github/workflows/i18n-weekly-pull.yaml

@@ -0,0 +1,41 @@
+name: i18n-weekly-pull
+
+on:
+  schedule:
+    # run every monday at 2AM
+    - cron:  '0 2 * * 1'
+
+jobs:
+  pull-from-transifex:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '1.14'
+
+      - name: Install Go deps
+        run: |
+          go get github.com/GeertJohan/go.rice/rice
+
+      - name: Install Taskfile
+        uses: Arduino/actions/setup-taskfile@master
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Run task i18n:pull
+        run: task i18n:pull
+        env:
+          TRANSIFEX_PROJECT: ${{ secrets.TRANSIFEX_PROJECT }}
+          TRANSIFEX_RESOURCE: ${{ secrets.TRANSIFEX_RESOURCE }}
+          TRANSIFEX_API_KEY: ${{ secrets.TRANSIFEX_API_KEY }}
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v2
+        with:
+          commit-message: Updated translation files
+          title: Updated translation files
+          branch: i18n/translations-update

Diff for: .github/workflows/test.yaml

@@ -23,7 +23,7 @@ jobs:
         uses: actions/checkout@master
 
       - name: Install Go
-        uses: actions/setup-go@v1
+        uses: actions/setup-go@v2
         with:
           go-version: '1.14'
 
@@ -35,6 +35,7 @@ jobs:
           go get github.com/golangci/govet
           go get golang.org/x/lint/golint
           go get github.com/golang/protobuf/protoc-gen-go
+          go get github.com/GeertJohan/go.rice/rice
         shell: bash
 
       - name: Install Taskfile

Diff for: Taskfile.yml

@@ -102,6 +102,7 @@ tasks:
       - test -z $(go fmt {{ default .DEFAULT_TARGETS .TARGETS }})
       - go vet {{ default .DEFAULT_TARGETS .TARGETS }}
       - "'{{.GOLINTBIN}}' {{.GOLINTFLAGS}} {{ default .DEFAULT_TARGETS .TARGETS }}"
+      - task: i18n:check
 
   check-legacy:
     desc: Check fmt and lint for the `legacy` package
@@ -114,6 +115,36 @@ tasks:
     cmds:
       - go test -run TestWithClientE2E ./commands/daemon
 
+  i18n:update:
+    desc: Updates i18n files
+    cmds:
+      - go run ./i18n/cmd/main.go catalog generate . > ./i18n/data/en.po
+      - task: i18n:generate
+
+  i18n:pull:
+    desc: Pull i18n files from transifex
+    cmds:
+      - go run ./i18n/cmd/main.go transifex pull -l {{.I18N_LANGS}} ./i18n/data
+      - task: i18n:generate
+
+  i18n:push:
+    desc: Push i18n files to transifex
+    cmds:
+      - go run ./i18n/cmd/main.go transifex push ./i18n/data
+
+  i18n:check:
+    desc: Check if the i18n message catalog was updated
+    cmds:
+      - task: i18n:update
+      - git add -N ./i18n/data
+      - git diff --exit-code ./i18n/data
+
+  i18n:generate:
+    desc: Generate embedded i18n catalog files
+    cmds:
+      - git add -N ./i18n/data
+      - git diff --exit-code ./i18n/data &> /dev/null || (cd ./i18n && rice embed-go)
+
 vars:
   # all modules of this project except for "legacy/..." module
   DEFAULT_TARGETS:
@@ -138,3 +169,4 @@ vars:
   DOCS_VERSION: dev
   DOCS_ALIAS: ""
   DOCS_REMOTE: "origin"
+  I18N_LANGS: "pt_BR"

Diff for: cli/board/board.go

@@ -36,7 +36,7 @@ func NewCommand() *cobra.Command {
 	boardCommand.AddCommand(initAttachCommand())
 	boardCommand.AddCommand(initDetailsCommand())
 	boardCommand.AddCommand(initListCommand())
-	boardCommand.AddCommand(listAllCommand)
+	boardCommand.AddCommand(initListAllCommand())
 
 	return boardCommand
 }

Diff for: cli/board/details.go

@@ -18,6 +18,8 @@ package board
 import (
 	"context"
 	"fmt"
+	"os"
+
 	"github.com/arduino/arduino-cli/cli/errorcodes"
 	"github.com/arduino/arduino-cli/cli/feedback"
 	"github.com/arduino/arduino-cli/cli/instance"
@@ -26,7 +28,6 @@ import (
 	"github.com/arduino/arduino-cli/table"
 	"github.com/fatih/color"
 	"github.com/spf13/cobra"
-	"os"
 )
 
 var showFullDetails bool

Diff for: cli/board/listall.go

@@ -29,17 +29,20 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var listAllCommand = &cobra.Command{
-	Use:   "listall [boardname]",
-	Short: "List all known boards and their corresponding FQBN.",
-	Long: "" +
-		"List all boards that have the support platform installed. You can search\n" +
-		"for a specific board if you specify the board name",
-	Example: "" +
-		"  " + os.Args[0] + " board listall\n" +
-		"  " + os.Args[0] + " board listall zero",
-	Args: cobra.ArbitraryArgs,
-	Run:  runListAllCommand,
+func initListAllCommand() *cobra.Command {
+	var listAllCommand = &cobra.Command{
+		Use:   "listall [boardname]",
+		Short: "List all known boards and their corresponding FQBN.",
+		Long: "" +
+			"List all boards that have the support platform installed. You can search\n" +
+			"for a specific board if you specify the board name",
+		Example: "" +
+			"  " + os.Args[0] + " board listall\n" +
+			"  " + os.Args[0] + " board listall zero",
+		Args: cobra.ArbitraryArgs,
+		Run:  runListAllCommand,
+	}
+	return listAllCommand
 }
 
 // runListAllCommand list all installed boards

Diff for: cli/cli.go

@@ -19,7 +19,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
-	"path/filepath"
 	"strings"
 
 	"github.com/arduino/arduino-cli/cli/board"
@@ -38,7 +37,7 @@ import (
 	"github.com/arduino/arduino-cli/cli/sketch"
 	"github.com/arduino/arduino-cli/cli/upload"
 	"github.com/arduino/arduino-cli/cli/version"
-	"github.com/arduino/arduino-cli/configuration"
+	"github.com/arduino/arduino-cli/i18n"
 	"github.com/arduino/arduino-cli/inventory"
 	"github.com/mattn/go-colorable"
 	"github.com/rifflock/lfshook"
@@ -48,23 +47,29 @@ import (
 )
 
 var (
+	verbose      bool
+	outputFormat string
+	configFile   string
+)
+
+// NewCommand creates a new ArduinoCli command root
+func NewCommand() *cobra.Command {
+	cobra.AddTemplateFunc("tr", i18n.Tr)
+
 	// ArduinoCli is the root command
-	ArduinoCli = &cobra.Command{
+	arduinoCli := &cobra.Command{
 		Use:              "arduino-cli",
 		Short:            "Arduino CLI.",
 		Long:             "Arduino Command Line Interface (arduino-cli).",
 		Example:          "  " + os.Args[0] + " <command> [flags...]",
 		PersistentPreRun: preRun,
 	}
 
-	verbose      bool
-	outputFormat string
-	configFile   string
-)
+	arduinoCli.SetUsageTemplate(usageTemplate)
 
-// Init the cobra root command
-func init() {
-	createCliCommandTree(ArduinoCli)
+	createCliCommandTree(arduinoCli)
+
+	return arduinoCli
 }
 
 // this is here only for testing
@@ -120,52 +125,7 @@ func parseFormatString(arg string) (feedback.OutputFormat, bool) {
 	return f, found
 }
 
-// This function is here to replicate the old logic looking for a config
-// file in the parent tree of the CWD, aka "project config".
-// Please
-func searchConfigTree(cwd string) string {
-	// go back up to root and search for the config file
-	for {
-		if _, err := os.Stat(filepath.Join(cwd, "arduino-cli.yaml")); err == nil {
-			// config file found
-			return cwd
-		} else if os.IsNotExist(err) {
-			// no config file found
-			next := filepath.Dir(cwd)
-			if next == cwd {
-				return ""
-			}
-			cwd = next
-		} else {
-			// some error we can't handle happened
-			return ""
-		}
-	}
-}
-
 func preRun(cmd *cobra.Command, args []string) {
-	//
-	// Prepare the configuration system
-	//
-	configPath := ""
-
-	// get cwd, if something is wrong don't do anything and let
-	// configuration init proceed
-	if cwd, err := os.Getwd(); err == nil {
-		configPath = searchConfigTree(cwd)
-	}
-
-	// override the config path if --config-file was passed
-	if fi, err := os.Stat(configFile); err == nil {
-		if fi.IsDir() {
-			configPath = configFile
-		} else {
-			configPath = filepath.Dir(configFile)
-		}
-	}
-
-	// initialize the config system
-	configuration.Init(configPath)
 	configFile := viper.ConfigFileUsed()
 
 	// initialize inventory

Diff for: cli/config/config.go

@@ -29,7 +29,7 @@ func NewCommand() *cobra.Command {
 		Example: "  " + os.Args[0] + " config init",
 	}
 
-	configCommand.AddCommand(dumpCmd)
+	configCommand.AddCommand(initDumpCmd())
 	configCommand.AddCommand(initInitCommand())
 
 	return configCommand

Diff for: cli/config/dump.go

@@ -25,13 +25,16 @@ import (
 	"gopkg.in/yaml.v2"
 )
 
-var dumpCmd = &cobra.Command{
-	Use:     "dump",
-	Short:   "Prints the current configuration",
-	Long:    "Prints the current configuration.",
-	Example: "  " + os.Args[0] + " config dump",
-	Args:    cobra.NoArgs,
-	Run:     runDumpCommand,
+func initDumpCmd() *cobra.Command {
+	var dumpCmd = &cobra.Command{
+		Use:     "dump",
+		Short:   "Prints the current configuration",
+		Long:    "Prints the current configuration.",
+		Example: "  " + os.Args[0] + " config dump",
+		Args:    cobra.NoArgs,
+		Run:     runDumpCommand,
+	}
+	return dumpCmd
 }
 
 // output from this command requires special formatting, let's create a dedicated

Diff for: cli/usage.go

@@ -0,0 +1,58 @@
+// This file is part of arduino-cli.
+//
+// Copyright 2020 ARDUINO SA (http://www.arduino.cc/)
+//
+// This software is released under the GNU General Public License version 3,
+// which covers the main part of arduino-cli.
+// The terms of this license can be found at:
+// https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// You can be released from the requirements of the above licenses by purchasing
+// a commercial license. Buying such a license is mandatory if you want to
+// modify or otherwise use the software for commercial activities involving the
+// Arduino software without disclosing the source code of your own applications.
+// To purchase a commercial license, send an email to [email protected].
+
+package cli
+
+import (
+	"github.com/arduino/arduino-cli/i18n"
+)
+
+// Declare ids used in usage
+var (
+	tr = i18n.Tr
+	_  = tr("Usage:")
+	_  = tr("Aliases:")
+	_  = tr("Examples:")
+	_  = tr("Available Commands:")
+	_  = tr("Flags:")
+	_  = tr("Global Flags:")
+	_  = tr("Additional help topics:")
+	_  = tr("Use %s for more information about a command.")
+)
+
+const usageTemplate = `{{tr "Usage:"}}{{if .Runnable}}
+  {{.UseLine}}{{end}}{{if .HasAvailableSubCommands}}
+  {{.CommandPath}} [command]{{end}}{{if gt (len .Aliases) 0}}
+
+{{tr "Aliases:"}}
+  {{.NameAndAliases}}{{end}}{{if .HasExample}}
+
+{{tr "Examples:"}}
+{{.Example}}{{end}}{{if .HasAvailableSubCommands}}
+
+{{tr "Available Commands:"}}{{range .Commands}}{{if (or .IsAvailableCommand (eq .Name "help"))}}
+  {{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableLocalFlags}}
+
+{{tr "Flags:"}}
+{{.LocalFlags.FlagUsages | trimTrailingWhitespaces}}{{end}}{{if .HasAvailableInheritedFlags}}
+
+{{tr "Global Flags:"}}
+{{.InheritedFlags.FlagUsages | trimTrailingWhitespaces}}{{end}}{{if .HasHelpSubCommands}}
+
+{{tr "Additional help topics:"}}{{range .Commands}}{{if .IsAdditionalHelpTopicCommand}}
+  {{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableSubCommands}}
+
+{{tr "Use %s for more information about a command." (printf "%s %s" .CommandPath "[command] --help" | printf "%q")}}{{end}}
+`