switch to node.js

.gitignore

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+node_modules/

index.js

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+#!/usr/bin/env node
+const exec = require('child_process').exec;
+const argv = require('minimist')(process.argv.slice(2));
+const xrandrParse = require('xrandr-parse');
+
+if (argv.help || argv.h) {
+    console.log(
+`swm - a helper to switch connected monitors
+
+usage: swm [monitor1 [monitor2]...] [--postCmd "<some commmand>"]
+
+If monitor is not passed it turns on all connected devices
+and lays them out next to each other in the order detected.
+
+monitor: The string as reported by the script. If provided only
+this monitor will be turned on.`
+    );
+
+    return;
+}
+
+const monitorsSelected = argv._;
+
+function getDevices() {
+    return new Promise((resolve, reject) => {
+        exec('xrandr', (err, stdout, stderr) => {
+            if (err || stderr) {
+                reject(err);
+                return;
+            }
+            resolve(xrandrParse(stdout));
+        });
+    });
+}
+
+function getDeviceStatus(deviceKey, device) {
+    if (monitorsSelected.indexOf(deviceKey) > -1 && device.connected) {
+        return '--auto';
+    }
+    return '--off';
+}
+
+function genXrandrOptions(devices) {
+    var xrandrOptions = '';
+
+    Object.keys(devices).forEach(deviceKey => {
+        const device = devices[deviceKey];
+        const deviceStatus = getDeviceStatus(deviceKey, device);
+        xrandrOptions += ['', '--output', deviceKey, deviceStatus].join(' ');
+    });
+
+    return xrandrOptions;
+}
+
+function switchDevices(xrandrOptions) {
+    return new Promise((resolve, reject) => {
+        const cmd = 'xrandr ' + xrandrOptions;
+        exec(cmd, (err, stdout, stderr) => {
+            if (err || stderr) {
+                reject(err);
+                return;
+            }
+            resolve();
+        });
+    });
+}
+
+function executePostCmd() {
+    if (!argv.postCmd) {
+        return;
+    }
+    return new Promise((resolve, reject) => {
+        exec(argv.postCmd, (err, stdout, stderr) => {
+            if (err || stderr) {
+                reject(err);
+                return;
+            }
+            resolve();
+        });
+    });
+}
+
+getDevices()
+    .then(genXrandrOptions)
+    .then(switchDevices)
+    .then(executePostCmd)
+    .catch(err => {
+        console.error(err);
+    });

package.json

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+{
+  "name": "switchmon",
+  "version": "1.0.0",
+  "description": "Simple helper for turning on/off connected/disconnected monitors with xrandr",
+  "main": "indes.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/tomru/switchmon.git"
+  },
+  "keywords": [
+    "xrandr",
+    "monitor"
+  ],
+  "author": "Thomas Ruoff",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/tomru/switchmon/issues"
+  },
+  "homepage": "https://github.com/tomru/switchmon#readme",
+  "dependencies": {
+    "minimist": "^1.2.0",
+    "xrandr-parse": "^0.1.1"
+  }
+}

swm

@@ -1,84 +0,0 @@
-#!/usr/bin/env bash
-#
-# Enable all connected montiors, disable all disconnected ones.
-# Multiple monitors will be added to the right of previous ones.
-#
-# Author Thomas Ruoff <ThomasRuoff@gmail.com>
-
-set -e
-
-usage() {
-    echo "swm - a helper to switch connected monitors";
-    echo;
-    echo "usage: swm [monitor]";
-    echo;
-    echo "If monitor is not passed it turns on all connected devices";
-    echo "and lays them out next to each other in the order detected.";
-    echo;
-    echo "monitor: The string as reported by the script. If provided only";
-    echo "this monitor will be turned on.";
-}
-
-echoerr() { echo "$@" 1>&2; }
-
-getFirstWord() {
-    awk '{print $1}'
-}
-
-linesToWords() {
-    awk 'BEGIN{ORS=" "} {print}'
-}
-
-wordsToLines() {
-    awk 'BEGIN{RS=" "} {print}'
-}
-
-without() {
-    comm -3 <(echo "$1") <(echo "$2")
-}
-
-
-if [[ $1 == "-h" ]] || [[ $1 == "--help" ]] ; then
-    usage
-    exit
-fi
-
-TARGET=$1;
-CONNECTED=$( xrandr | grep " connected" | sort | getFirstWord);
-DISCONNECTED=$( xrandr | grep "disconnected" | sort | getFirstWord);
-
-POSTCMD="herbstclient reload";
-
-echo connected devices: $(echo $CONNECTED | wordsToLines);
-echo disconnected devices: $(echo $DISCONNECTED | wordsToLines);
-
-if [[ -n "$TARGET" ]] && [[ ! "$CONNECTED" =~ "$TARGET" ]] ; then
-    echoerr "error: device $1 is not connected";
-    exit 1;
-fi
-
-FORON=${@-$CONNECTED};
-
-FOROFF="$DISCONNECTED $(without "$CONNECTED" "$FORON")";
-
-# turn off all disconnected monitors
-XRANDR_OFF_OPTIONS="";
-for mon in $FOROFF; do
-    XRANDR_OFF_OPTIONS+=" --output $mon --off";
-done
-
-# turn on all connected monitors
-XRANDR_ON_OPTIONS="";
-LAST="";
-for mon in $FORON; do
-    XRANDR_ON_OPTIONS+=" --output $mon --auto";
-    if [ ! -z $LAST ]; then
-        XRANDR_ON_OPTIONS+=" --right-of $LAST";
-    fi
-    LAST=$mon;
-done
-
-xrandr $XRANDR_ON_OPTIONS $XRANDR_OFF_OPTIONS &&\
-    echo Activated monitors: ${FORON} &&\
-    $POSTCMD;
-