feat(uninstall): Implement uninstall command and --auto flag

lib/commands/index.js

@@ -31,6 +31,7 @@ export default class Commands {
     this.options = options || {};
     this.complete = new Complete(this.options);
     this.installer = new Installer(this.options, this.complete);
+    this.shell = process.env.SHELL.split('/').slice(-1)[0];
   }
 
   // Commands
@@ -65,7 +66,27 @@ export default class Commands {
   }
 
   // Public: to be implemented.
-  uninstall() {}
+  uninstall(options) {
+    debug('Trigger uninstall command', options);
+    if (!options.auto) throw new Error('Uninstall only available with --auto flag');
+
+    var dest = this.shell === 'zsh' ? '~/.zshhrc' :
+      this.shell === 'bash' ? '~/.bashrc' :
+      '~/.config/fish/config.fish';
+
+    // win32 ?
+    dest = dest.replace('~', process.env.HOME);
+
+    debug('Destination:', dest);
+    this.installer.uninstallCompletion(dest)
+      .catch(e => {
+        throw e
+      })
+      .then(() => {
+        console.log('uninstall end');
+      });
+
+  }
 
   // Public: to be implemented.
   search() {}

lib/installer.js

@@ -1,8 +1,7 @@
 const debug = require('./debug')('tabtab:installer')
 
-
-import fs from                'fs'
-import path from              'path'
+import fs from                'fs';
+import path from              'path';
 import inquirer from          'inquirer';
 import { spawn, exec } from   'child_process';
 import mkdirp from            'mkdirp';
@@ -26,6 +25,13 @@ export default class Installer {
   constructor(options, complete) {
     this.options = options || {};
     this.complete = complete;
+
+    this._shell = process.env.SHELL.split('/').slice(-1)[0];
+    this.dest = this._shell === 'zsh' ? 'zshrc' :
+      this._shell === 'bash' ? 'bashrc' :
+      'fish';
+
+    this.dest = this.dest.replace('~', process.env.HOME);
   }
 
   // Called on install command.
@@ -40,8 +46,12 @@ export default class Installer {
       });
     });
 
-    return this.prompt()
-      .then(this.writeTo.bind(this));
+    if (options.auto) {
+      this.template = this._shell;
+      return this.writeTo({ destination: this.dest });
+    }
+
+    return this.prompt().then(this.writeTo.bind(this));
   }
 
   writeTo(data) {
@@ -129,6 +139,38 @@ export default class Installer {
     });
   }
 
+  uninstallCompletion(destination) {
+    return new Promise((r, errback) => {
+      fs.readFile(destination, 'utf8', (err, body) => {
+        if (err) return errback(err);
+        r(body);
+      });
+    })
+
+    .then((body) => {
+      var lines = body.split(/\r?\n/);
+
+      debug('Uninstall', this.options);
+      var name = this.options.name;
+      var reg = new RegExp('(tabtab source for ' + name + ' package|`tabtab uninstall ' + name + '`|node-tabtab/.completions/' + name + '.' + this.template + ')');
+      debug('reg', reg);
+      lines = lines.filter((line) => {
+        return !reg.test(line);
+      });
+
+      return lines.join('\n');
+    })
+
+    .then((content) => {
+      return new Promise((r, errback) => {
+        fs.writeFile(destination, content, (err) => {
+          if (err) return errback(err);
+          debug('%s sucesfully updated to remove tabtab', destination);
+        });
+      });
+    });
+  }
+
   // Prompts user for installation location.
   prompt() {
     var choices = [{

readme.md

@@ -204,6 +204,20 @@ should do:
 ![zsh](./docs/img/zsh-install.png)
 ![fish](./docs/img/fish-install.png)
 
+#### tabtab install --auto
+
+The `--auto` flag can be used to bypass prompts and use the SHELL configuration file options by default:
+
+- bash: Will use `~/.bashrc`
+- zsh: Will use `~/.zshrc`
+- bash: Will use `~/.config/fish/config.fish`
+
+This way, you can silently install / uninstall completion for a specific command without asking user to do so.
+
+### tabtab uninstall --auto
+
+The uninstall command can be used to undo what has been done by `tabtab install --auto` command.
+
 ### Completion description
 
 > todo: zsh / fish offers the ability to define description with each