-
RUSTUP_LOG
(default: none). Enables Rustup’s “custom logging mode”. In this mode,
the verbosity of Rustup’s log lines can be specified with tracing_subscriber
’s
directive syntax. For example, set RUSTUP_LOG=rustup=DEBUG
to receive log lines
from rustup
itself with a maximal verbosity of DEBUG
.
-
RUSTUP_HOME
(default: ~/.rustup
or %USERPROFILE%/.rustup
). Sets the
root rustup
folder, used for storing installed toolchains and
configuration options.
-
RUSTUP_TOOLCHAIN
(default: none). If set, will override the toolchain used
for all rust tool invocations. A toolchain with this name should be installed,
or invocations will fail. This can specify custom toolchains, installable
toolchains, or the absolute path to a toolchain.
-
RUSTUP_DIST_SERVER
(default: https://static.rust-lang.org
). Sets the root
URL for downloading static resources related to Rust. You can change this to
instead use a local mirror, or to test the binaries from the staging
directory.
-
RUSTUP_DIST_ROOT
deprecated (default: https://static.rust-lang.org/dist
).
Use RUSTUP_DIST_SERVER
instead.
-
RUSTUP_UPDATE_ROOT
(default https://static.rust-lang.org/rustup
). Sets
the root URL for downloading self-update.
-
RUSTUP_IO_THREADS
unstable (defaults to reported cpu count). Sets the
number of threads to perform close IO in. Set to 1
to force
single-threaded IO for troubleshooting, or an arbitrary number to override
automatic detection.
-
RUSTUP_TRACE_DIR
unstable (default: no tracing). Enables tracing and
determines the directory that traces will be written too. Traces are of the
form PID.trace. Traces can be read by the Catapult project tracing viewer.
-
RUSTUP_TERM_COLOR
(default: auto
). Controls whether colored output is used in the terminal.
Set to auto
to use colors only in tty streams, to always
to always enable colors,
or to never
to disable colors.
-
RUSTUP_UNPACK_RAM
unstable (default free memory or 500MiB if unable to tell, min 210MiB). Caps the amount of
RAM rustup
will use for IO tasks while unpacking.
-
RUSTUP_NO_BACKTRACE
. Disables backtraces on non-panic errors even when
RUST_BACKTRACE
is set.
-
RUSTUP_PERMIT_COPY_RENAME
unstable. When set, allows rustup to fall-back
to copying files if attempts to rename
result in cross-device link
errors. These errors occur on OverlayFS, which is used by Docker. This
feature sacrifices some transactions protections and may be removed at any
point. Linux only.