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fb5e22e318
This changes makes nix detect a machines available cores automatically whenever build-cores is set to 0. So far, nix simply passed NIX_BUILD_CORES=0 whenever build-cores is set to 0. (only when build-cores is unset it was detecting cores automatically) The behavior of passing NIX_BUILD_CORES=0 leads to a performance penalty when sourcing nixpkgs' generic builder's `setup.sh`, as setup.sh has to execute `nproc`. This significantly slows down sourcing of setup.sh
32 lines
1.1 KiB
Bash
Executable file
32 lines
1.1 KiB
Bash
Executable file
#!/usr/bin/env bash
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source common.sh
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clearStoreIfPossible
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echo "Testing build-cores configuration behavior..."
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# Test 1: When build-cores is set to a non-zero value, NIX_BUILD_CORES should have that value
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echo "Testing build-cores=4..."
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rm -f "$TEST_ROOT"/build-cores-output
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nix-build --cores 4 build-cores.nix -A testCores -o "$TEST_ROOT"/build-cores-output
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result=$(cat "$(readlink "$TEST_ROOT"/build-cores-output)")
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if [[ "$result" != "4" ]]; then
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echo "FAIL: Expected NIX_BUILD_CORES=4, got $result"
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exit 1
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fi
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echo "PASS: build-cores=4 correctly sets NIX_BUILD_CORES=4"
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rm -f "$TEST_ROOT"/build-cores-output
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# Test 2: When build-cores is set to 0, NIX_BUILD_CORES should be resolved to getDefaultCores()
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echo "Testing build-cores=0..."
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nix-build --cores 0 build-cores.nix -A testCores -o "$TEST_ROOT"/build-cores-output
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result=$(cat "$(readlink "$TEST_ROOT"/build-cores-output)")
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if [[ "$result" == "0" ]]; then
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echo "FAIL: NIX_BUILD_CORES should not be 0 when build-cores=0"
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exit 1
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fi
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echo "PASS: build-cores=0 resolves to NIX_BUILD_CORES=$result (should be > 0)"
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rm -f "$TEST_ROOT"/build-cores-output
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echo "All build-cores tests passed!"
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