如何判断是否正在从交互式外壳程序运行makefile? [英] How can I tell if a makefile is being run from an interactive shell?

问题描述

我有一个makefile，它运行可能需要一段时间的命令.如果构建是从交互式Shell启动的，那么我希望这些命令能使您变得轻松，而如果不是(特别是cron)，则可以使这些命令更安静.(伪代码)的内容:

I have a makefile which runs commands that can take a while. I'd like those commands to be chatty if the build is initiated from an interactive shell but quieter if not (specifically, by cron). Something along the lines of (pseudocode):

foo_opts = -a -b -c
if (make was invoked from an interactive shell):
    foo_opts += --verbose

all: bar baz
    foo $(foo_opts)

这是GNU品牌.如果我正在做的事情很重要，我可以编辑问题.

This is GNU make. If the specifics of what I'm doing matter, I can edit the question.

推荐答案

并不是严格确定是否从交互式外壳程序中调用它，但是对于将输出重定向到文件的cron作业，该问题的答案与如何检测是否我的Shell脚本正在通过管道运行?:

It isn't strictly determining whether it is invoked from an interactive shell or not, but for a cron job in which the output is redirected to a file, the answer to this question would be the same as for How to detect if my shell script is running through a pipe?:

if [ -t 0 ]
then
    # input is from a terminal
fi

编辑:要使用它在Makefile中设置变量(在GNU make中，就是这样):

To use this to set a variable in a Makefile (in GNU make, that is):

INTERACTIVE:=$(shell [ -t 0 ] && echo 1)

ifdef INTERACTIVE
# is a terminal
else
# cron job
endif

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