fix(core): avoid changing existing project name if a project.json file is added to a project

[AgentEnder]

Current Behavior

When adding a project.json file to configure certain aspects of an existing Nx project, that project's name will be changed. We had to fix this for package-json based projects a while back, and as we expand polyglot its coming up again.

Expected Behavior

The "default name" behavior stamped into the project.json plugin doesn't trample existing names. To do this, it had to be moved out of the project.json plugin and into the validate + normalize flow

Related Issue(s)

Fixes #

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☁️ Nx Cloud last updated this comment at 2025-10-17 23:21:44 UTC

[nx-cloud]

Nx Cloud is proposing a fix for your failed CI:

We've identified and fixed a bug in the project name assignment logic. The code was using the wrong variable (root instead of project.root) when generating a default project name from a project.json file, causing tests to fail with "Cannot find configuration for 'app1'" errors.

diff --git a/packages/nx/src/project-graph/utils/project-configuration-utils.ts b/packages/nx/src/project-graph/utils/project-configuration-utils.ts
index cbda398a13..08a79d4103 100644
--- a/packages/nx/src/project-graph/utils/project-configuration-utils.ts
+++ b/packages/nx/src/project-graph/utils/project-configuration-utils.ts
@@ -677,7 +677,7 @@ function validateAndNormalizeProjectRootMap(
       !project.name &&
       existsSync(join(workspaceRoot, project.root, 'project.json'))
     ) {
-      project.name = toProjectName(join(root, 'project.json'));
+      project.name = toProjectName(join(project.root, 'project.json'));
     }
 
     try {

  

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