Deduplicate commands for each run

run-if-changed.js

@@ -7,4 +7,7 @@ if (changedFiles.length === 0) {
   process.exit(0);
 }
 
-require('./src/runForMatchingPatterns')(changedFiles, config);
+const resolveMatchingPatterns = require('./src/resolveMatchingPatterns');
+const runCommands = require('./src/runCommands');
+
+runCommands(resolveMatchingPatterns(changedFiles, config));

src/findBinary.js

@@ -1,3 +1,5 @@
+// This code is adapted from https://git.io/fhsKi
+
 const parseStringArgv = require('string-argv');
 const which = require('npm-which')(process.cwd());
 

src/resolveMatchingPatterns.js

@@ -0,0 +1,13 @@
+const matcher = require('./matcher');
+
+module.exports = function resolveMatchingPatterns(list, config) {
+  const commandsToRun = Object.entries(config)
+    .filter(([pattern]) => matcher(list, [pattern]))
+    .map(([, commands]) => commands)
+    // Flatten array
+    .reduce((acc, val) => acc.concat(val), []);
+
+  // unique commands, do not run them multiple times if they are the same
+  // for multiple patterns or they are repeated in a list for a single pattern
+  return [...new Set(commandsToRun)];
+};