PowerShell / PowerShell/PSScriptAnalyzer
Warn on Undeclared Variable
Nobody has claimed this yet.
- Dominant language
- C#
- Stars
- 2.2k
- Forks
- 414
- Avg merge
- 13h 1m
- Merged PRs (30d)
- 2
Description
There is currently a rule that warns when I have assigned a variable but haven't called it (UseDeclaredVarsMoreThanAssignments), however, there doesn't appear to be a rule that warns me if I have used a variable that hasn't been assigned.
Is this a possibility? I can definitely see there would be some challenges around implementing it correctly, but this would be a useful warning.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading the existing UseDeclaredVarsMoreThanAssignments rule and the surrounding PSScriptAnalyzer rule implementation to understand how variable usage is analyzed. Determine the intended handling of variables used before assignment, then define tests that cover the supported cases. Done means the analyzer reports undeclared variable use without incorrectly flagging valid scripts.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- csharp, powershell
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100