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Add capitalized .R extension to R#289658

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aeschli merged 2 commits into
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aeschli/ruling-mongoose-903
Jan 22, 2026
Merged

Add capitalized .R extension to R#289658
aeschli merged 2 commits into
mainfrom
aeschli/ruling-mongoose-903

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@aeschli aeschli commented Jan 22, 2026

fixes #284740

Copilot AI review requested due to automatic review settings January 22, 2026 14:43
@aeschli aeschli enabled auto-merge (squash) January 22, 2026 14:43
@aeschli aeschli self-assigned this Jan 22, 2026
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Pull request overview

This pull request aims to change the default R file extension from lowercase .r to uppercase .R to align with R source code conventions, R IDEs (RStudio, Positron), and the Tidyverse Style Guide.

Changes:

  • Updates the R language extension configuration to use capitalized file extensions (.R, .Rhistory, .Rprofile)

Comment thread extensions/r/package.json
Comment on lines +20 to +22
".R",
".Rhistory",
".Rprofile",
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The change completely removes support for lowercase file extensions (.r, .rhistory, .rprofile). While .R should be the default/preferred extension (first in the list), the lowercase variants should still be supported for backward compatibility. Many existing R files use lowercase extensions and would lose language support with this change. The extensions array should include both uppercase and lowercase versions, with .R listed first to make it the default.

Suggested change
".R",
".Rhistory",
".Rprofile",
".R",
".r",
".Rhistory",
".rhistory",
".Rprofile",
".rprofile",

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@vs-code-engineering vs-code-engineering Bot added this to the January 2026 milestone Jan 22, 2026
@aeschli aeschli merged commit 41aebd8 into main Jan 22, 2026
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@aeschli aeschli deleted the aeschli/ruling-mongoose-903 branch January 22, 2026 21:09
@vs-code-engineering vs-code-engineering Bot locked and limited conversation to collaborators Mar 8, 2026
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Use .R (not .r) as default R file extension

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