From a7d4c2e9f650b86f8e19833079c286a64f807d2a Mon Sep 17 00:00:00 2001
From: JYC <jycouet@gmail.com>
Date: Tue, 13 Sep 2022 21:50:46 +0200
Subject: [PATCH] Improve monorepo support (#539)

* :sparkles: NEW: mon repo support

* Trigger

* :bug: FIX: isDirectory

* :zap: IMPROVE: making it private

* :zap: IMPROVE: ready for mocks as well

* :recycle: IMPROVE: naming to existsSync
---
 .changeset/olive-carrots-fry.md |  5 +++++
 src/common/config.ts            | 36 +++++++++++++++++++++++++++++----
 src/common/fs.ts                |  9 +++++++++
 3 files changed, 46 insertions(+), 4 deletions(-)
 create mode 100644 .changeset/olive-carrots-fry.md

diff --git a/.changeset/olive-carrots-fry.md b/.changeset/olive-carrots-fry.md
new file mode 100644
index 0000000000..3d96fa0891
--- /dev/null
+++ b/.changeset/olive-carrots-fry.md
@@ -0,0 +1,5 @@
+---
+'houdini': patch
+---
+
+fix - mono repo support
diff --git a/src/common/config.ts b/src/common/config.ts
index 0f07bd4616..b9f3655326 100644
--- a/src/common/config.ts
+++ b/src/common/config.ts
@@ -293,15 +293,43 @@ ${
 		return '$houdini.d.ts'
 	}
 
+	private findNodeModulesHoudini(currentLocation: string) {
+		const pathEndingBy = ['node_modules', 'houdini']
+
+		// Build the first possible location
+		let locationFound = path.join(currentLocation, ...pathEndingBy)
+
+		// previousLocation is nothing
+		let previousLocation = ''
+		const backFolder = []
+
+		// if previousLocation !== locationFound that mean that we can go upper
+		// if the directory doesn't exist, let's go upper.
+		while (previousLocation !== locationFound && !fs.existsSync(locationFound)) {
+			// save the previous path
+			previousLocation = locationFound
+
+			// add a back folder
+			backFolder.push('../')
+
+			// set the new location
+			locationFound = path.join(currentLocation, ...backFolder, ...pathEndingBy)
+		}
+
+		if (previousLocation === locationFound) {
+			throw new Error('Could not find any node_modules/houdini folder')
+		}
+
+		return locationFound
+	}
+
 	get runtimeSource() {
 		// when running in the real world, scripts are nested in a sub directory of build, in tests they aren't nested
 		// under /src so we need to figure out how far up to go to find the appropriately compiled runtime
 		const relative = process.env.TEST
 			? path.join(currentDir, '../../')
-			: // TODO: it's very possible this breaks someones setup. the old version walked up from currentDir
-			  // there isn't a consistent number of steps up anymore since the vite plugin and cmd live at different depths
-			  // a better approach could be to start at current dir and walk up until we find a `houdini` dir
-			  path.join(path.dirname(this.filepath), 'node_modules', 'houdini')
+			: // start here and go to parent until we find the node_modules/houdini folder
+			  this.findNodeModulesHoudini(path.join(path.dirname(this.filepath)))
 
 		// we want to copy the typescript source code for the templates and then compile the files according
 		// to the requirements of the platform
diff --git a/src/common/fs.ts b/src/common/fs.ts
index 818bea95e8..d3fb02f848 100644
--- a/src/common/fs.ts
+++ b/src/common/fs.ts
@@ -113,6 +113,15 @@ export async function stat(filepath: string) {
 	return memfs.statSync(filepath)
 }
 
+export function existsSync(dirPath: string) {
+	// no mock in production
+	if (process.env.NODE_ENV !== 'test') {
+		return fsExtra.existsSync(dirPath)
+	}
+
+	return memfs.existsSync(dirPath)
+}
+
 export async function readdir(filepath: string): Promise<string[]> {
 	// no mock in production
 	if (process.env.NODE_ENV !== 'test') {