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Add nproc equivalent for macOS #1483

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6 changes: 6 additions & 0 deletions Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -188,7 +188,13 @@ golangci-lint:
$(LOCALBIN)/golangci-lint run --fix

MAX_PROCS := 5
UNAME_S := $(shell uname -s)
ifeq ($(UNAME_S),Linux)
NUM_PROCS := $(shell expr $(shell nproc --ignore 2) / 2)
endif
ifeq ($(UNAME_S),Darwin)
NUM_PROCS := $(shell expr $(shell sysctl -n hw.logicalcpu) / 2)

@bshephar bshephar Jun 7, 2025

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I was personally just installing coreutils from homebrew, which contains nproc:

❯ nproc --ignore 2
8
❯ uname -s
Darwin

Which comes from:
https://formulae.brew.sh/formula/coreutils
https://github.com/coreutils/coreutils/blob/037b93106155c5e11681837305b541808fbdb9b5/src/nproc.c

endif
PROCS ?= $(shell if [ $(NUM_PROCS) -gt $(MAX_PROCS) ]; then echo $(MAX_PROCS); else echo $(NUM_PROCS); fi)
PROC_CMD = --procs $(PROCS)

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