feat(@angular/cli): Generate completion.sh automatically.

It requires little tweaking in the case-block.

Now the completion shell script is generated out of TypeScript code entirely.  The options and aliases are generated dynamically.  There are options to only produce bash- or zsh-specific code.

Closes #3981.

README.md

@@ -285,19 +285,19 @@ To turn on auto completion use the following commands:
 
 For bash:
 ```bash
-ng completion 1>> ~/.bashrc 2>>&1
+ng completion --bash >> ~/.bashrc
 source ~/.bashrc
 ```
 
 For zsh:
 ```bash
-ng completion 1>> ~/.zshrc 2>>&1
+ng completion --zsh >> ~/.zshrc
 source ~/.zshrc
 ```
 
 Windows users using gitbash:
 ```bash
-ng completion 1>> ~/.bash_profile 2>>&1
+ng completion --bash >> ~/.bash_profile
 source ~/.bash_profile
 ```
 

packages/@angular/cli/commands/completion.ts

@@ -1,17 +1,181 @@
-import * as path from 'path';
 import * as fs from 'fs';
+import * as path from 'path';
 
+import { oneLine, stripIndent } from 'common-tags';
+
+const stringUtils = require('ember-cli-string-utils');
 const Command = require('../ember-cli/lib/models/command');
+const lookupCommand = require('../ember-cli/lib/cli/lookup-command');
+
+function extractOptions(opts: any): String {
+  const output: String[] = [];
+
+  for (let index = 0; index < opts.length; index++) {
+    const element = opts[index];
+    output.push('--' + element.name);
+    if (element.aliases) {
+      output.push('-' + element.aliases[0]);
+    }
+  }
+
+  return output.sort().join(' ');
+}
+
+export interface CompletionCommandOptions {
+  all?: boolean;
+  bash?: boolean;
+  zsh?: boolean;
+};
+
+const commandsToIgnore = [
+  'easter-egg',
+  'destroy',
+  'github-pages-deploy' // errors because there is no base github-pages command
+];
+
+const optsNg: String[] = [];
 
 const CompletionCommand = Command.extend({
   name: 'completion',
   description: 'Adds autocomplete functionality to `ng` commands and subcommands',
   works: 'everywhere',
-  run: function() {
-    const scriptPath = path.resolve(__dirname, '..', 'utilities', 'completion.sh');
-    const scriptOutput = fs.readFileSync(scriptPath, 'utf8');
+  availableOptions: [
+    { name: 'all',   type: Boolean, default: true,  aliases: ['a'] },
+    { name: 'bash',  type: Boolean, default: false, aliases: ['b'] },
+    { name: 'zsh',   type: Boolean, default: false, aliases: ['z'] }
+  ],
+
+  run: function (commandOptions: CompletionCommandOptions) {
+    commandOptions.all = !commandOptions.bash && !commandOptions.zsh;
+
+    const commandFiles = fs.readdirSync(__dirname)
+      .filter(file => file.match(/\.ts$/) && !file.match(/\.run.ts$/))
+      .map(file => path.parse(file).name)
+      .filter(file => {
+        return commandsToIgnore.indexOf(file) < 0;
+      })
+      .map(file => file.toLowerCase());
+
+    const commandMap = commandFiles.reduce((acc: any, curr: string) => {
+      let classifiedName = stringUtils.classify(curr);
+      let defaultImport = require(`./${curr}`).default;
+
+      acc[classifiedName] = defaultImport;
+
+      return acc;
+    }, {});
+
+    let caseBlock = '';
+
+    commandFiles.forEach(cmd => {
+      const Command = lookupCommand(commandMap, cmd);
+      const com: String[] = [];
+
+      const command = new Command({
+        ui: this.ui,
+        project: this.project,
+        commands: this.commands,
+        tasks: this.tasks
+      });
+
+      optsNg.push(command.name);
+      com.push(command.name);
+
+      if (command.aliases) {
+        command.aliases.forEach((element: String) => {
+          optsNg.push(element);
+          com.push(element);
+        });
+      }
+
+      if (command.availableOptions && command.availableOptions[0]) {
+        let opts = extractOptions (command.availableOptions);
+        caseBlock = caseBlock + '    ' + com.sort().join('|') + ') opts="' + opts + '" ;;\n';
+      }
+    });
+
+    caseBlock = 'ng|help) opts="' + optsNg.sort().join(' ') + '" ;;\n' +
+                caseBlock +
+                '    *) opts="" ;;';
+
+    console.log(stripIndent`
+      ###-begin-ng-completion###
+      #
+
+      # ng command completion script
+      #   This command supports 3 cases.
+      #   1. (Default case) It prints a common completion initialisation for both Bash and Zsh.
+      #      It is the result of either calling "ng completion" or "ng completion -a".
+      #   2. Produce Bash-only completion: "ng completion -b" or "ng completion --bash".
+      #   3. Produce Zsh-only completion: "ng completion -z" or "ng completion --zsh".
+      #
+      # Installation: ng completion -b >> ~/.bashrc
+      #           or  ng completion -z >> ~/.zshrc
+      #`);
+
+    if (commandOptions.all && !commandOptions.bash) {
+      console.log('if test ".$(type -t complete 2>/dev/null || true)" = ".builtin"; then');
+    }
+
+    if (commandOptions.all || commandOptions.bash) {
+      console.log(stripIndent`
+          _ng_completion() {
+           local cword pword opts
+
+           COMPREPLY=()
+           cword=\${COMP_WORDS[COMP_CWORD]}
+           pword=\${COMP_WORDS[COMP_CWORD - 1]}
+
+           case \${pword} in
+             ${caseBlock}
+           esac
+
+           COMPREPLY=( $(compgen -W '\${opts}' -- $cword) )
+
+           return 0
+         }
+
+         complete -o default -F _ng_completion ng
+         `);
+    }
+
+    if (commandOptions.all) {
+      console.log(stripIndent`
+        elif test ".$(type -w compctl 2>/dev/null || true)" = ".compctl: builtin" ; then
+        `);
+    }
+
+    if (commandOptions.all || commandOptions.zsh) {
+      console.log(stripIndent`
+          _ng_completion () {
+            local words cword opts
+            read -Ac words
+            read -cn cword
+            let cword-=1
+
+            case $words[cword] in
+              ${caseBlock}
+            esac
+
+            setopt shwordsplit
+            reply=($opts)
+            unset shwordsplit
+          }
+
+          compctl -K _ng_completion ng
+          `);
+    }
+
+    if (commandOptions.all) {
+      console.log(stripIndent`
+        else
+          echo "Builtin command 'complete' or 'compctl' is redefined; cannot produce completion."
+          return 1
+        fi`);
+    }
+
+    console.log('###-end-ng-completion###');
 
-    console.log(scriptOutput);
   }
 });
 

packages/@angular/cli/utilities/completion.sh

@@ -1,85 +0,0 @@
-###-begin-ng-completion###
-#
-# ng command completion script
-#
-# Installation: ng completion 1>> ~/.bashrc 2>>&1
-#           or  ng completion 1>> ~/.zshrc 2>>&1
-#
-
-ng_opts='b build completion doc e2e g generate get github-pages:deploy gh-pages:deploy h help i init install lint make-this-awesome new s serve server set t test v version'
-
-build_opts='--aot --base-href --environment --i18n-file --i18n-format --locale --output-path --progress --sourcemap --suppress-sizes --target --vendor-chunk --verbose --watch --watcher -bh -dev -e -o -prod -sm -t -w'
-generate_opts='class component directive enum module pipe route service c cl d e m p r s --help'
-github_pages_deploy_opts='--base-href --environment --gh-token --gh-username --message --skip-build --target --user-page --custom-domain -cd -bh -e -t'
-help_opts='--json --verbose -v'
-init_opts='--dry-run inline-style inline-template --link-cli --name --prefix --routing --skip-npm --source-dir --style --verbose -d -is -it -lc -n -p -sb -sd -sn -v'
-new_opts='--directory --dry-run inline-style inline-template --link-cli --prefix --routing --skip-git --skip-npm --source-dir --style --verbose -d -dir -is -it -lc -p -sb -sd -sg -sn -v'
-serve_opts='--aot --environment --hmr --host --i18n-file --i18n-format --live-reload --live-reload-base-url --live-reload-host --live-reload-live-css --live-reload-port --locale --open --port --proxy-config --sourcemap --ssl --ssl-cert --ssl-key --target --watcher -H -e -lr -lrbu -lrh -lrp -o -p -pc -sm -t -w'
-set_opts='--global -g'
-test_opts='--browsers --build --code-coverage --colors --lint --log-level --port --reporters --single-run --sourcemap --watch -cc -l -sm -sr -w'
-
-version_opts='--verbose'
-
-if test ".$(type -t complete 2>/dev/null || true)" = ".builtin"; then
-  _ng_completion() {
-    local cword pword opts
-
-    COMPREPLY=()
-    cword=${COMP_WORDS[COMP_CWORD]}
-    pword=${COMP_WORDS[COMP_CWORD - 1]}
-
-    case ${pword} in
-      ng) opts=$ng_opts ;;
-      b|build) opts=$build_opts ;;
-      g|generate) opts=$generate_opts ;;
-      gh-pages:deploy|github-pages:deploy) opts=$github_pages_deploy_opts ;;
-      h|help|-h|--help) opts=$help_opts ;;
-      init) opts=$init_opts ;;
-      new) opts=$new_opts ;;
-      s|serve|server) opts=$serve_opts ;;
-      set) opts=$set_opts ;;
-      t|test) opts=$test_opts ;;
-      v|version) opts=$version_opts ;;
-      *) opts='' ;;
-    esac
-
-    COMPREPLY=( $(compgen -W '${opts}' -- $cword) )
-
-    return 0
-  }
-
-  complete -o default -F _ng_completion ng
-elif test ".$(type -w compctl 2>/dev/null || true)" = ".compctl: builtin" ; then
-  _ng_completion () {
-    local words cword opts
-    read -Ac words
-    read -cn cword
-    let cword-=1
-
-    case $words[cword] in
-      ng) opts=$ng_opts ;;
-      b|build) opts=$build_opts ;;
-      g|generate) opts=$generate_opts ;;
-      gh-pages:deploy|github-pages:deploy) opts=$github_pages_deploy_opts ;;
-      h|help|-h|--help) opts=$help_opts ;;
-      init) opts=$init_opts ;;
-      new) opts=$new_opts ;;
-      s|serve|server) opts=$serve_opts ;;
-      set) opts=$set_opts ;;
-      t|test) opts=$test_opts ;;
-      v|version) opts=$version_opts ;;
-      *) opts='' ;;
-    esac
-
-    setopt shwordsplit
-    reply=($opts)
-    unset shwordsplit
-  }
-
-  compctl -K _ng_completion ng
-else
-  echo "Shell builtin command 'complete' or 'compctl' is redefined; cannot perform ng completion."
-  return 1
-fi
-
-###-end-ng-completion###