Implement initial run-if-changed with commander and cosmiconfig

Author: hkdobrev

bin/git-run-if-changed.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+if [ $# -lt 2 ]; then
+    >&2 echo "usage: git-run-if-changed.sh <file> <commands...>"
+    exit 1
+fi
+
+
+git diff-tree --name-only --no-commit-id HEAD@{1} HEAD | grep --quiet "$1" 2> /dev/null
+
+if [ $? -eq 0 ]; then
+    echo "$1 changed:"
+    shift
+    while (($#)); do
+        echo "Running '$1'..."
+        eval "$1"
+        shift
+    done
+
+fi

index.js

@@ -0,0 +1,45 @@
+#!/usr/bin/env node
+
+
+const cli = require('commander');
+const util = require('util');
+const process = require('process');
+const cosmiconfig = require('cosmiconfig');
+const exec = util.promisify(require('child_process').exec);
+const pkg = require('./package.json');
+
+cli
+  .version(pkg.version, '-v, --version')
+  .parse(process.argv);
+
+async function runCommandsIfFileChanged(fileToCheck, commandsList) {
+  const commandsString = commandsList.map(x => `"${x}"`).join(' ');
+  const command = `./bin/git-run-if-changed.sh "${fileToCheck}" ${commandsString}`;
+  const response = await exec(command);
+  const { stdout, stderr } = response;
+  if (stdout) {
+    console.log(stdout);
+  }
+  if (response instanceof Error) {
+    console.error('There was an error executing script:');
+  }
+  if (stderr) {
+    console.error(stderr);
+  }
+}
+
+const configResult = cosmiconfig(pkg.name).searchSync();
+
+if (!configResult || configResult.isEmpty) {
+  process.exit(0);
+}
+
+const { config } = configResult;
+
+Object.entries(config).forEach(([file, commands]) => {
+  if (commands.length === 0) {
+    return;
+  }
+
+  runCommandsIfFileChanged(file, commands);
+});

package.json

@@ -6,5 +6,9 @@
   "main": "index.js",
   "repository": "https://github.com/hkdobrev/run-if-changed",
   "author": "Haralan Dobrev <hkdobrev@gmail.com>",
-  "license": "MIT"
+  "license": "MIT",
+  "dependencies": {
+    "commander": "^2.19.0",
+    "cosmiconfig": "^5.0.7"
+  }
 }