python - 将多个参数传递给 scons builder 命令

Question

我想运行一个将多个文件合并为一个的命令。因此，如果我创建两个文件:

echo 1 > a.txt
echo 2 > b.txt

然后我创建以下 scons 文件:

import os
import os.path as op

env = Environment()
b = Builder(action="cat $SOURCE")

builders = {"b":b}
env.Append(BUILDERS=builders)

env.b("x.txt", ["a.txt", "b.txt"])

它仅使用参数a.txt调用cat:

scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
cat a.txt
1
scons: done building targets.

我可以让它同时使用两个参数调用 cat 吗？

cat a.txt b.txt

Answer 1

当然，您只需将操作定义为“cat $SOURCES”即可(注意末尾添加的“S”)。