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ty/docs/reference/env.md
Zanie Blue 5f9803b4fa
Split the documentation out of the top-level README (#331) 
Moves most of the documentation into a dedicated `docs/README` to make
it easier to reach important content in the top-level readme like
"getting involved".

There are some minor changes to the heading levels here and link
changes, but otherwise the content is the same. Don't go deep on the
getting started section, that's changing in #329
2025-05-12 13:45:02 -05:00

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Environment variables

ty defines and respects the following environment variables:

TY_LOG

If set, ty will use this value as the log level for its --verbose output. Accepts any filter compatible with the tracing_subscriber crate. For example:

  • TY_LOG=uv=debug is the equivalent of -vv to the command line
  • TY_LOG=trace will enable all trace-level logging.

See the tracing documentation for more.

TY_MAX_PARALLELISM

Specifies an upper limit for the number of tasks ty is allowed to run in parallel. For example, how many files should be checked in parallel.

This isn’t the same as a thread limit. ty may spawn additional threads when necessary, e.g. to watch for file system changes or a dedicated UI thread.

Externally defined variables

ty also reads the following externally defined environment variables:

RAYON_NUM_THREADS

Specifies an upper limit for the number of threads ty uses when performing work in parallel. Equivalent to TY_MAX_PARALLELISM.

VIRTUAL_ENV

Used to detect an activated virtual environment.

XDG_CONFIG_HOME

Path to user-level configuration directory on Unix systems.