Initial take on the commands + renderers + cli.

lib/renderers/cli.js

@@ -0,0 +1,94 @@
+var mout = require('mout');
+
+var paddings = {
+    tag: 10,
+    tagPlusLabel: 30
+};
+
+var tagColors = {
+    'warn': 'yellow',
+    'error': 'red',
+    '_default': 'cyan',
+};
+
+// -------------------------
+
+function renderData(data) {
+    // Ensure data
+    data.data = data.data || '';
+
+    return 'bower ' + renderTagPlusLabel(data) + ' ' + data.data + '\n';
+}
+
+function renderError(err) {
+    var str;
+
+    err.level = 'error';
+    err.tag = err.code;
+
+    str = 'bower ' + renderTagPlusLabel(err) + ' ' + err.message + '\n';
+
+    // Check if additional details were provided
+    if (err.details) {
+        str += err.details + '\n';
+    }
+
+    // Print trace
+    str += '\n' + err.stack + '\n';
+
+    return str;
+}
+
+function renderEnd() {
+    return '';
+}
+
+// -------------------------
+
+function empty() {
+    return '';
+}
+
+function uncolor(str) {
+    return str.replace(/\x1B\[\d+m/g, '');
+}
+
+function renderTagPlusLabel(data) {
+    var label;
+    var length;
+    var nrSpaces;
+    var tag = data.tag;
+    var tagColor = tagColors[data.level] || tagColors._default;
+
+    // If there's not enough space, print only the tag
+    if (process.stdout.columns < 120) {
+        return mout.string.rpad(tag, paddings.tag)[tagColor];
+    }
+
+    label = data.origin + '#' + data.endpoint.target;
+    length = tag.length + label.length + 1;
+    nrSpaces = paddings.tagPlusLabel - length;
+
+    // Make at least one space
+    if (nrSpaces < 1) {
+        nrSpaces = 1;
+    }
+
+    return tag[tagColor] + mout.string.repeat(' ', nrSpaces) + label.green;
+}
+
+module.exports.colorful = {};
+module.exports.colorful.head = empty;
+module.exports.colorful.tail = empty;
+
+module.exports.colorful.data = renderData;
+module.exports.colorful.error = renderError;
+module.exports.colorful.end = renderEnd;
+
+// The colorless variant simply removes the colors from the colorful methods
+module.exports.colorless = mout.object.map(module.exports.colorful, function (fn) {
+    return function () {
+        var str = fn.apply(fn, arguments);
+        return uncolor(str);
+    };
+});