如何在 Makefile 中设置子进程的环境变量 [英] How to set child process' environment variable in Makefile

问题描述

我想更改此 Makefile:

I would like to change this Makefile:

SHELL := /bin/bash
PATH  := node_modules/.bin:$(PATH)

boot:
    @supervisor         
      --harmony         
      --watch etc,lib       
      --extensions js,json      
      --no-restart-on error     
        lib

test:
    NODE_ENV=test mocha         
      --harmony             
      --reporter spec       
        test

clean:
    @rm -rf node_modules

.PHONY: test clean

到:

SHELL := /bin/bash
PATH  := node_modules/.bin:$(PATH)

boot:
    @supervisor         
      --harmony         
      --watch etc,lib       
      --extensions js,json      
      --no-restart-on error     
        lib

test: NODE_ENV=test
test:
    mocha                   
      --harmony             
      --reporter spec       
        test

clean:
    @rm -rf node_modules

.PHONY: test clean

不幸的是第二个不起作用(节点进程仍然使用默认的NODE_ENV运行.

Unfortunately the second one does not work (the node process still runs with the default NODE_ENV.

我错过了什么?

推荐答案

默认情况下，make 变量不会导出到进程 make 调用的环境中.但是，您可以使用 make 的 export 来强制他们这样做.更改:

Make variables are not exported into the environment of processes make invokes... by default. However you can use make's export to force them to do so. Change:

test: NODE_ENV = test

为此:

test: export NODE_ENV = test

(假设您拥有足够现代的 GNU make >= 3.77 版本).

(assuming you have a sufficiently modern version of GNU make >= 3.77 ).

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