chairmanpow
2f6f35b054
A build cache serves a dependency rebuild after a branch switch or a `git clean` instead of recompiling it, which is most of what the in-loop verify spends. It stays a convenience and never a requirement: with nothing on `PATH` nothing is exported and a clone needs only stable Rust and a C compiler, exactly as before. `check.sh`, `gates.sh` and `smoke.sh` source it, so the loops pick it up without being asked and a machine that would rather not have it sets `BENILLA_NO_SCCACHE=1`. An existing `RUSTC_WRAPPER` wins. Only rustc is wrapped — the vendored Lua build wants its own `CC="sccache cc"`, so it is not cached by this.
26 lines
1.1 KiB
Bash
Executable File
26 lines
1.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Use sccache for rustc when it is installed. It is a developer convenience, never a requirement:
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# without it nothing is exported and a clone needs only stable Rust and a C compiler.
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#
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# Sourced, it exports RUSTC_WRAPPER into the current shell for later cargo commands; run with a
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# command, it wraps just that command. The verify, land and smoke scripts source it themselves.
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#
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# . scripts/sccache.sh && cargo play
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# scripts/sccache.sh cargo play
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#
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# An existing RUSTC_WRAPPER wins, BENILLA_NO_SCCACHE=1 skips this, and SCCACHE_DISABLE=1 turns
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# sccache itself off. Only rustc is wrapped: the vendored Lua build wants its own `CC="sccache cc"`.
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# Sourced, it must not change the caller's shell options.
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enable() {
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[ -n "${RUSTC_WRAPPER:-}" ] && return 0
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[ -n "${BENILLA_NO_SCCACHE:-}" ] && return 0
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command -v sccache >/dev/null 2>&1 || return 0
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export RUSTC_WRAPPER=sccache
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}
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enable
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# Executed with a command: run it wrapped. Sourced: leave the caller's positionals alone.
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if [ "${BASH_SOURCE[0]}" = "$0" ] && [ "$#" -gt 0 ]; then
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exec "$@"
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fi
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