From 36921d10761a51abb54a952fa78167a7e964088f Mon Sep 17 00:00:00 2001
From: NullVoxPopuli <LPSego3+dev@gmail.com>
Date: Thu, 4 Jun 2020 11:16:23 -0400
Subject: [PATCH] support local paths

---
 src/index.js                    | 57 ++++++++++++++++++++-------------
 src/normalize-blueprint-args.js | 21 ++++++++++--
 src/parse-blueprint-package.js  | 10 +++++-
 3 files changed, 62 insertions(+), 26 deletions(-)

diff --git a/src/index.js b/src/index.js
index 5473ac49e..38540794a 100644
--- a/src/index.js
+++ b/src/index.js
@@ -64,6 +64,7 @@ module.exports = async function emberCliUpdate({
   let blueprint;
   let packageUrl;
 
+  debugger;
   if (_blueprint) {
     let blueprintArgs = normalizeBlueprintArgs({
       packageName,
@@ -72,38 +73,48 @@ module.exports = async function emberCliUpdate({
 
     let parsedPackage = await parseBlueprintPackage({
       cwd,
-      packageName: blueprintArgs.packageName
+      packageName: blueprintArgs.packageName,
+      localLocation: blueprintArgs.localLocation
     });
     packageUrl = parsedPackage.url;
 
     packageName = parsedPackage.name;
-    if (!packageName) {
-      let downloadedPackage = await downloadPackage(null, packageUrl, defaultTo);
-      packageName = downloadedPackage.name;
-    }
-    let blueprintName;
-    if (blueprintArgs.blueprintName !== blueprintArgs.packageName) {
-      blueprintName = blueprintArgs.blueprintName;
-    } else {
-      blueprintName = packageName;
-    }
 
-    let existingBlueprint = findBlueprint(emberCliUpdateJson, packageName, blueprintName);
-    if (existingBlueprint) {
-      blueprint = existingBlueprint;
-    } else {
-      blueprint = loadSafeBlueprint({
-        packageName,
-        name: blueprintName,
-        location: parsedPackage.location
+    if (blueprintArgs.localLocation) {
+      blueprint = await loadDefaultBlueprintFromDisk({
+        cwd: blueprintArgs.localLocation,
+        version: from
       });
+    } else {
+      if (!packageName) {
+        let downloadedPackage = await downloadPackage(null, packageUrl, defaultTo);
+        packageName = downloadedPackage.name;
+      }
+      let blueprintName;
+      if (blueprintArgs.blueprintName !== blueprintArgs.packageName) {
+        blueprintName = blueprintArgs.blueprintName;
+      } else {
+        blueprintName = packageName;
+      }
 
-      if (isDefaultBlueprint(blueprint)) {
-        blueprint = await loadDefaultBlueprintFromDisk({
-          cwd,
-          version: from
+      let existingBlueprint = findBlueprint(emberCliUpdateJson, packageName, blueprintName);
+      if (existingBlueprint) {
+        blueprint = existingBlueprint;
+      } else {
+        blueprint = loadSafeBlueprint({
+          packageName,
+          name: blueprintName,
+          location: parsedPackage.location
         });
+
+        if (isDefaultBlueprint(blueprint)) {
+          blueprint = await loadDefaultBlueprintFromDisk({
+            cwd,
+            version: from
+          });
+        }
       }
+
     }
 
     if (from) {
diff --git a/src/normalize-blueprint-args.js b/src/normalize-blueprint-args.js
index b5336e927..044eedd09 100644
--- a/src/normalize-blueprint-args.js
+++ b/src/normalize-blueprint-args.js
@@ -1,16 +1,33 @@
 'use strict';
 
+const path = require('path');
+const fs = require('fs');
+
 function normalizeBlueprintArgs({
   packageName,
   blueprintName
 }) {
+  let localLocation;
+
   if (!packageName) {
-    packageName = blueprintName;
+    let potentialLocalPath = path.join(
+      process.cwd(),
+      blueprintName,
+      'package.json'
+    );
+
+    if (fs.existsSync(potentialLocalPath)) {
+      packageName = require(potentialLocalPath).name;
+      localLocation = potentialLocalPath;
+    } else {
+      packageName = blueprintName;
+    }
   }
 
   return {
     packageName,
-    blueprintName
+    blueprintName,
+    localLocation
   };
 }
 
diff --git a/src/parse-blueprint-package.js b/src/parse-blueprint-package.js
index 167d3102f..5017d013b 100644
--- a/src/parse-blueprint-package.js
+++ b/src/parse-blueprint-package.js
@@ -16,13 +16,21 @@ function toPosixAbsolutePath(path) {
 
 async function parseBlueprintPackage({
   cwd = '.',
-  packageName
+  packageName,
+  localLocation,
 }) {
   let name;
   let location;
   let url;
   let blueprintPath;
 
+  if (localLocation) {
+    return {
+      name: packageName,
+      location: localLocation,
+    };
+  }
+
   if (packageName.startsWith('.')) {
     blueprintPath = path.resolve(cwd, packageName);
   } else if (path.isAbsolute(packageName) && await fs.pathExists(packageName)) {