Refactor to customize shell integration per shell

src/shell-integration/supported-shells/fish.js

@@ -0,0 +1,45 @@
+import {
+  addLineToFile,
+  doesExecutableExistOnSystem,
+  execAndGetOutput,
+  removeLinesMatchingPattern,
+} from "../helpers.js";
+
+const shellName = "Fish";
+const executableName = "fish";
+const startupFileCommand = "echo ~/.config/fish/config.fish";
+
+function isInstalled() {
+  return doesExecutableExistOnSystem(executableName);
+}
+
+function teardown() {
+  const startupFile = execAndGetOutput(startupFileCommand, executableName);
+
+  // Removes all aliases starting with "alias npm=", "alias npx=", or "alias yarn="
+  // This will remove the safe-chain aliases for npm, npx, and yarn commands.
+  removeLinesMatchingPattern(startupFile, /^alias\s+(npm|npx|yarn)\s+/);
+
+  return true;
+}
+
+function setup(tools) {
+  const startupFile = execAndGetOutput(startupFileCommand, executableName);
+  teardown();
+
+  for (const tool of tools) {
+    addLineToFile(
+      startupFile,
+      `alias ${tool} "aikido-${tool}" # Safe-chain alias for ${tool}`
+    );
+  }
+
+  return true;
+}
+
+export default {
+  name: shellName,
+  isInstalled,
+  setup,
+  teardown,
+};