for-loop - Makefile:for 循环并在出错时中断

Question

我有一个带有 for 循环的 Makefile。问题是当循环内发生错误时，执行继续。

SUBDIRS += $(shell ls -d */ | grep amore)

# breaks because can't write in /, stop execution, return 2
test:
    mkdir / 
    touch /tmp/zxcv

# error because can't write in / but carry on, finally return 0
tests:
    @for dir in $(SUBDIRS); do \
            mkdir / ; \  
            touch /tmp/zxcv ; \ 
    done;

遇到错误时如何让循环停止？

Answer 1

要么添加 || exit 1对每个可能失败的调用或您执行 set -e在规则的开头:

tests1:
    @dir in $(SUBDIRS); do \
      mkdir / \
      && touch /tmp/zxcv \
      || exit 1; \
    done

tests2:
    @set -e; \
    for dir in $(SUBDIRS); do \
      mkdir / ; \
      touch /tmp/zxcv ; \
    done