获取 scons 根目录
我需要作为自定义构建器的一部分按顺序运行两个程序。
其中之一是我无法处理绝对/相对路径的程序，因此我必须使用生成器的 chdir=1 选项，以便其操作在相同的路径中运行目录作为目标。
第二个是位于项目的 tools 子目录中的脚本； SConstruct 文件位于项目的根目录中。我需要创建一个操作来运行此脚本，但遇到了麻烦，因为我既没有项目的绝对路径，也没有从目标所在目录到工具的相对路径> 脚本所在的子目录。如果我能以某种方式获得项目根目录的绝对路径，我就准备好了，我可以连接“tools/myscript.bar”并完成它。
这或多或少是我所拥有的：
env['BUILDERS']['FooBar'] = Builder(action = [
'c:/bin/foo.exe ${SOURCE.filebase}',
'c:/bin/bar-interpreter.exe myscript.bar ${SOURCE.filebase}',
], chdir=1);
问题是我需要更改有问题的操作，以便可以找到“myscript.bar”，例如：
env['BUILDERS']['FooBar'] = Builder(action = [
'c:/bin/foo.exe ${SOURCE.filebase}',
'c:/bin/bar-interpreter.exe $PATHTOHERE/tools/myscript.bar ${SOURCE.filebase}',
], chdir=1);
这看起来很简单，但我不知道如何做。
I need to run two programs in sequence as part of a custom builder.
One of them is a program that I'm stuck with and can't deal with absolute/relative paths so I have to use the chdir=1 option of the Builder so that its actions run in the same directory as the target.
The second is a script that is located in the tools subdirectory of the project; the SConstruct file is in the root of the project. I need to create an action to run this script, and am having trouble because I have neither the absolute path to the project, nor a relative path from the directory in which the target is located back up to the tools subdirectory where the script is located. If I could somehow get the absolute path to the root directory of my project, I'd be all set, I could just concatenate `tools/myscript.bar' and be done with it.
Here's what I have, more or less:
env['BUILDERS']['FooBar'] = Builder(action = [
'c:/bin/foo.exe ${SOURCE.filebase}',
'c:/bin/bar-interpreter.exe myscript.bar ${SOURCE.filebase}',
], chdir=1);
The problem is that I need to change the action in question so that "myscript.bar" can be found, something like:
env['BUILDERS']['FooBar'] = Builder(action = [
'c:/bin/foo.exe ${SOURCE.filebase}',
'c:/bin/bar-interpreter.exe $PATHTOHERE/tools/myscript.bar ${SOURCE.filebase}',
], chdir=1);
This seems so simple but I can't figure out how.
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您应该使用“#”来指示源目录的顶部。
如果您也使用变体目录，此版本也适用。例如在 SConstruct 中：
然后在 main.scons 中：
第一个将打印
/path/to/project/build，而第二个将显示正确的/path/to/project。You should use "#" to indicate the top of the source directory.
This version works if you use a variant directory too. For example in SConstruct:
Then in main.scons:
The first will print
/path/to/project/build, whereas the second will show the correct/path/to/project.咕噜。很简单；这似乎有效。
Grrr. It is simple; this seems to work.