project-graph cannot be generated in workspaces running on Windows and without git

[strobocopter]

Current Behavior

When running any operation that depends on a project-graph being build (e.g. running dep-graph for visualisation in the browser or trying to build libraries with dependencies), it will fail if the nx-workspace runs on a Windows operating system and is not using git.

Expected Behavior

Generation of the project-graph should work on windows without using a git-repo tool

Steps to Reproduce

1.) Create a new nx-workspace on windows machine
2.) Make sure the workspace does not contain .git-Folder or .gitignore files
3.) Have a least two libraries in the workspace, with one having a typescript import for the other
4.) run "nx graph"
-> Dependency is not shown

Failure Logs

Instead of posting failure logs I will just detail on my findings (actually I was able to fix the problem by patching the "file-map-utils.js" in the @nrwl/workspace package).

What I reverse-engineered:

• When building a project-graph nx will first build up hashes for all files in the workspace
• By default it tries to use a git-hasher, but if this fails it falls back to a node-based-file-hasher
• The file-hasher creates file-description objects that contain the path of the file as well as it's current hash
• The git-hasher creates file-paths that look like "hello/world/file"
• On windows systems the node-based-file-hasher creates file-paths that look like "hello\\world\\file"
• For generating the project-graph the "file-map-utils" are used to create a map that carries all file-descriptions for a given project
• The keys in this map are taken from the "root"-property of the project.json files and usually look like "hello/world/file"
  --> Filling up this map does not work on windows systems since the keys will never match the paths from the file-descriptions

Environment

Node : 14.18.3
OS : win32 x64
npm : 6.14.15

nx : 13.9.4
@nrwl/angular : 13.9.4
@nrwl/cypress : 13.9.4
@nrwl/workspace : 13.9.4
typescript : 4.5.5
rxjs : 6.6.7

Community plugins:
@dcs/builders: 2.0.1 (you won't find this on a public repo)
@dcs/schematics: 2.0.2 (you won't find this on a public repo)

[github-actions]

This issue has been closed for more than 30 days. If this issue is still occuring, please open a new issue with more recent context.