fix: Rollup rebuilds in watch mode (#449)

New API: `Processor.dependents()`, to get all files that depend on a specific file.

BREAKING CHANGE:  `Processor.remove()` no longer removes the specified files AND their dependencies.

packages/browserify/browserify.js

@@ -159,7 +159,13 @@ module.exports = function(browserify, opts) {
     // Watchify fires update events when files change, this tells the processor
     // to remove the changed files from its cache so they will be re-processed
     browserify.on("update", (files) => {
-        processor.remove(files);
+        files.forEach((file) => {
+            processor.dependents(file).forEach((dep) =>
+                processor.remove(dep)
+            );
+
+            processor.remove(file);
+        });
     });
 
     return browserify.on("bundle", (current) => {

packages/browserify/test/__snapshots__/issue-58.test.js.snap

@@ -2,44 +2,44 @@
 
 exports[`/browserify.js /issues /58 should update when CSS dependencies change 1`] = `
 "(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c=\\"function\\"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error(\\"Cannot find module '\\"+i+\\"'\\");throw a.code=\\"MODULE_NOT_FOUND\\",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u=\\"function\\"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
-require('./packages/browserify/test/specimens/issues/58/issue.css');
-},{\\"./packages/browserify/test/specimens/issues/58/issue.css\\":2}],2:[function(require,module,exports){
+require('./packages/browserify/test/output/issues/58/issue.css');
+},{\\"./packages/browserify/test/output/issues/58/issue.css\\":2}],2:[function(require,module,exports){
 module.exports = {
-    \\"issue1\\": \\"mc2652cf16_other1 mc46e4a65d_issue1\\",
-    \\"issue2\\": \\"mc2652cf16_other1 mc46e4a65d_issue1 mc2652cf16_other3 mc46e4a65d_issue2\\"
+    \\"issue1\\": \\"mce821a830_other1 mc2a3f7922_issue1\\",
+    \\"issue2\\": \\"mce821a830_other1 mc2a3f7922_issue1 mce821a830_other3 mc2a3f7922_issue2\\"
 };
-},{\\"./packages/browserify/test/specimens/issues/58/other.css\\":3}],3:[function(require,module,exports){
+},{\\"./packages/browserify/test/output/issues/58/other.css\\":3}],3:[function(require,module,exports){
 module.exports = {
-    \\"other1\\": \\"mc2652cf16_other1\\",
-    \\"other2\\": \\"mc2652cf16_other2\\",
-    \\"other3\\": \\"mc2652cf16_other3\\"
+    \\"other1\\": \\"mce821a830_other1\\",
+    \\"other2\\": \\"mce821a830_other2\\",
+    \\"other3\\": \\"mce821a830_other3\\"
 };
 },{}]},{},[1]);
 "
 `;
 
 exports[`/browserify.js /issues /58 should update when CSS dependencies change 2`] = `
 "(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c=\\"function\\"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error(\\"Cannot find module '\\"+i+\\"'\\");throw a.code=\\"MODULE_NOT_FOUND\\",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u=\\"function\\"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
-require('./packages/browserify/test/specimens/issues/58/issue.css');
-},{\\"./packages/browserify/test/specimens/issues/58/issue.css\\":2}],2:[function(require,module,exports){
+require('./packages/browserify/test/output/issues/58/issue.css');
+},{\\"./packages/browserify/test/output/issues/58/issue.css\\":2}],2:[function(require,module,exports){
 module.exports = {
-    \\"issue1\\": \\"mc2652cf16_other1 mc46e4a65d_issue1\\",
-    \\"issue2\\": \\"mc2652cf16_other1 mc46e4a65d_issue1 mc2652cf16_other2 mc2652cf16_other3 mc46e4a65d_issue2\\"
+    \\"issue1\\": \\"mce821a830_other1 mc2a3f7922_issue1\\",
+    \\"issue2\\": \\"mce821a830_other1 mc2a3f7922_issue1 mce821a830_other2 mce821a830_other3 mc2a3f7922_issue2\\"
 };
 },{}]},{},[1]);
 "
 `;
 
 exports[`/browserify.js /issues /58 should update when CSS dependencies change 3`] = `
-"/* packages/browserify/test/specimens/issues/58/other.css */
-.mc2652cf16_other1 { color: green; }
-.mc2652cf16_other2 { color: yellow; }
-.mc2652cf16_other3 { background: white; }
-/* packages/browserify/test/specimens/issues/58/issue.css */
-.mc46e4a65d_issue1 {
+"/* packages/browserify/test/output/issues/58/other.css */
+.mce821a830_other1 { color: green; }
+.mce821a830_other2 { color: yellow; }
+.mce821a830_other3 { background: white; }
+/* packages/browserify/test/output/issues/58/issue.css */
+.mc2a3f7922_issue1 {
     color: teal;
 }
-.mc46e4a65d_issue2 {
+.mc2a3f7922_issue2 {
     color: aqua;
 }"
 `;

packages/browserify/test/issue-58.test.js

@@ -1,45 +1,46 @@
 "use strict";
 
-var fs = require("fs"),
-
-    from       = require("from2-string"),
-    shell      = require("shelljs"),
-    browserify = require("browserify"),
-    watchify   = require("watchify"),
-    dedent     = require("dedent"),
+const from = require("from2-string");
+const shell = require("shelljs");
+const browserify = require("browserify");
+const watchify  = require("watchify");
+const dedent = require("dedent");
 
-    read = require("test-utils/read.js")(__dirname),
-
-    bundle = require("./lib/bundle.js"),
-    plugin = require("../browserify.js");
+const read = require("test-utils/read.js")(__dirname);
+const write = require("test-utils/write.js")(__dirname);
 
-function write(txt) {
-    fs.writeFileSync(
-        "./packages/browserify/test/specimens/issues/58/other.css",
-        dedent(txt),
-        "utf8"
-    );
-}
+const bundle = require("./lib/bundle.js");
+const plugin = require("../browserify.js");
 
 describe("/browserify.js", () => {
     describe("/issues", () => {
         describe("/58", () => {
-            afterAll(() => {
-                shell.rm("-rf", "./packages/browserify/test/output/issues");
-                shell.rm("./packages/browserify/test/specimens/issues/58/other.css");
-            });
+            afterAll(() => shell.rm("-rf", "./packages/browserify/test/output/issues"));
 
             it("should update when CSS dependencies change", (done) => {
                 var build = browserify();
 
-                write(`
+                write("./issues/58/issue.css", dedent(`
+                    .issue1 {
+                        composes: other1 from "./other.css";
+                        color: teal;
+                    }
+
+                    .issue2 {
+                        composes: issue1;
+                        composes: other3 from "./other.css";
+                        color: aqua;
+                    }
+                `));
+
+                write("./issues/58/other.css", dedent(`
                     .other1 { color: red; }
                     .other2 { color: navy; }
                     .other3 { color: blue; }
-                `);
+                `));
 
                 build.add(
-                    from("require('./packages/browserify/test/specimens/issues/58/issue.css');")
+                    from("require('./packages/browserify/test/output/issues/58/issue.css');")
                 );
 
                 build.plugin(watchify);
@@ -60,11 +61,11 @@ describe("/browserify.js", () => {
                 bundle(build).then((out) => {
                     expect(out).toMatchSnapshot();
 
-                    write(`
+                    write("./issues/58/other.css", dedent(`
                         .other1 { color: green; }
                         .other2 { color: yellow; }
                         .other3 { composes: other2; background: white; }
-                    `);
+                    `));
                 });
             });
         });

packages/core/package.json

@@ -23,7 +23,6 @@
     "lodash.get": "^4.4.2",
     "lodash.invert": "^4.3.0",
     "lodash.mapvalues": "^4.6.0",
-    "lodash.uniq": "^4.5.0",
     "p-each-series": "^1.0.0",
     "postcss": "^6.0.11",
     "postcss-selector-parser": "^3.0.0",