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Make prereqs.py specific about rust version #3231

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Merged
amcasey merged 1 commit into from
May 19, 2026
Merged

Make prereqs.py specific about rust version #3231

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8 changes: 7 additions & 1 deletion prereqs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -119,7 +119,9 @@ def check_prereqs(install=False, skip_wasm=False):
rust_version = subprocess.check_output(["rustc", "--version"])
print(f"Detected Rust version: {rust_version.decode()}")
except FileNotFoundError:
print("Rust compiler not found. Install from https://rustup.rs/")
print(
f'Rust compiler not found. Install from https://rustup.rs/ and then run "rustup default {rust_ver[0]}.{rust_ver[1]}"'
)
exit(1)

ver_match = re.search(r"rustc (\d+)\.(\d+)\.(\d+)", rust_version.decode())
Expand All @@ -130,6 +132,10 @@ def check_prereqs(install=False, skip_wasm=False):
f'Rust v{rust_ver[0]}.{rust_ver[1]} is required. Please update with "rustup default {rust_ver[0]}.{rust_ver[1]}"'
)
exit(1)
elif found_ver > rust_ver:
print(
f'WARNING: Rust version {found_ver[0]}.{found_ver[1]}.{found_ver[2]} is newer than expected {rust_ver[0]}.{rust_ver[1]}.{rust_ver[2]}. There may be new linter warnings. To switch, run "rustup default {rust_ver[0]}.{rust_ver[1]}"'
)
else:
raise Exception("Unable to determine the Rust compiler version.")

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