Fix imported files not causing watch mode updates

index.js

@@ -6,7 +6,6 @@
 
 const { dirname } = require('path');
 const { createFilter } = require('rollup-pluginutils');
-const { compile } = require('glslify');
 
 function compressShader(code) {
     // Based on https://github.com/vwochnik/rollup-plugin-glsl
@@ -58,7 +57,12 @@ module.exports = function glslify(userOptions = {}) {
                 options
             );
 
-            code = compile(code, fileOptions);
+            const { source, deps } = iface().compile(code, fileOptions);
+            code = source;
+
+            for (const dep of deps.filter(dep => !dep.entry)) {
+                this.addWatchFile(dep.file);
+            }
 
             if (typeof options.compress === 'function') {
                 code = options.compress(code);
@@ -73,3 +77,57 @@ module.exports = function glslify(userOptions = {}) {
         }
     };
 };
+
+// The following lines (except for where commented) are copied directly from
+// https://github.com/glslify/glslify/blob/ba9c52c46e10068215290753e99ac516cc02d0d7/index.js
+
+var glslifyBundle = require('glslify-bundle');
+var glslifyDeps   = require('glslify-deps/sync');
+var nodeResolve   = require('resolve');
+var path          = require('path');
+var stackTrace    = require('stack-trace');
+
+function iface () {
+    try { var basedir = path.dirname(stackTrace.get()[2].getFileName()); }
+    catch (err) { basedir = process.cwd(); }
+    var posts = [];
+    return { compile }; // modified to only return the compile function
+
+    function compile(src, opts) {
+        if (!opts) opts = {};
+        var depper = gdeps(opts);
+        var deps = depper.inline(src, opts.basedir || basedir);
+        return { source: bundle(deps), deps }; // modified to return deps as well as the bundle
+    }
+    function gdeps (opts) {
+        if (!opts) opts = {};
+        var depper = glslifyDeps({ cwd: opts.basedir || basedir });
+        var transforms = opts.transform || [];
+        transforms = Array.isArray(transforms) ? transforms : [transforms];
+        transforms.forEach(function(transform) {
+            transform = Array.isArray(transform) ? transform : [transform];
+            var name = transform[0];
+            var opts = transform[1] || {};
+            if (opts.post) {
+                posts.push({ name, opts });
+            } else {
+                depper.transform(name, opts);
+            }
+        });
+        return depper;
+    }
+    function bundle (deps) {
+        var source = glslifyBundle(deps);
+        posts.forEach(function (tr) {
+            if (typeof tr.name === 'function') {
+                var transform = tr.name;
+            } else {
+                var target = nodeResolve.sync(tr.name, { basedir });
+                var transform = require(target); // eslint-disable-line no-redeclare
+            }
+            var src = transform((deps && deps[0] && deps[0].file) || null, source, { post: true });
+            if (src) source = src;
+        });
+        return source;
+    }
+}

package.json

@@ -25,8 +25,10 @@
     "test": "node ./test/index.js"
   },
   "dependencies": {
-    "glslify": "^7.1.1",
-    "rollup-pluginutils": "^2.8.2"
+    "glslify-bundle": "^5.1.1",
+    "glslify-deps": "^1.3.2",
+    "rollup-pluginutils": "^2.8.2",
+    "stack-trace": "0.0.9"
   },
   "devDependencies": {
     "eslint": "^8.23.1",