checkpoint

src/bin/tools/getInstalledModuleDirPath.ts

@@ -0,0 +1,53 @@
+import { dirname as pathDirname, join as pathJoin } from "path";
+import { existsAsync } from "./fs.existsAsync";
+import * as child_process from "child_process";
+import { assert } from "tsafe/assert";
+
+export async function getInstalledModuleDirPath(params: {
+    moduleName: string;
+    packageJsonFilePath: string;
+    projectDirPath: string;
+}) {
+    const { moduleName, packageJsonFilePath, projectDirPath } = params;
+
+    const packageJsonDirPath = pathDirname(packageJsonFilePath);
+
+    common_case: {
+        const dirPath = pathJoin(
+            ...[packageJsonDirPath, "node_modules", ...moduleName.split("/")]
+        );
+
+        if (!(await existsAsync(dirPath))) {
+            break common_case;
+        }
+
+        return dirPath;
+    }
+
+    node_modules_at_root_case: {
+        if (projectDirPath === packageJsonDirPath) {
+            break node_modules_at_root_case;
+        }
+
+        const dirPath = pathJoin(
+            ...[projectDirPath, "node_modules", ...moduleName.split("/")]
+        );
+
+        if (!(await existsAsync(dirPath))) {
+            break node_modules_at_root_case;
+        }
+
+        return dirPath;
+    }
+
+    const dirPath = child_process
+        .execSync(`npm list ${moduleName}`, {
+            cwd: packageJsonDirPath
+        })
+        .toString("utf8")
+        .trim();
+
+    assert(dirPath !== "");
+
+    return dirPath;
+}