[CMake] string(REGEX REPLACE …) syntax problem

[David Cole]

REGEX REPLACE will replace "this" with "that" in the entire input 
string, everywhere it matches. If you want to limit it to just the one 
bit that matches inside the parenthesis, you have to match the entire 
string, too, so that it will also be replaced. In your example, the \\1 
is being set to "Release" and the "/build Release" is being replaced 
with \\1 in the entire input string. So in effect, you erased the 
"/build " from in front of it. What you want is to erase the whole 
string, except for the "Release", right?

This should work:

> string(REGEX REPLACE "^.*/build ([A-Za-z]+).*$" "\\1" BUILD_CONFIG 
${FOO})

I just added "^.*" at the beginning, and ".*$" at the end, so it 
matches the entire input string.


Hope this helps,
David C.



-----Original Message-----
From: Braden McDaniel <braden at endoframe.com>
To: cmake <cmake at cmake.org>
Sent: Sat, Mar 30, 2013 11:10 pm
Subject: [CMake] string(REGEX REPLACE …) syntax problem


I must be Doing It Wrong; but I'm not seeing how...

If I do a REGEX MATCH as follows:

> build_command(FOO)
> string(REGEX MATCH "/build ([A-Za-z]+)" BUILD_CONFIG ${FOO})
> message(STATUS "BUILD_CONFIG = ${BUILD_CONFIG}")


... I get, as expected:

> BUILD_CONFIG = /build Release

However, if I use the same expression with REGEX REPLACE:

> build_command(FOO)
> string(REGEX REPLACE "/build ([A-Za-z]+)" "\\1" BUILD_CONFIG ${FOO})
> message(STATUS "BUILD_CONFIG = ${BUILD_CONFIG}")

... BUILD_CONFIG holds the entire build command line rather than just 
the
configuration name:

> BUILD_CONFIG = C:\PROGRA~2\MICROS~1.0\Common7\IDE\devenv.com my.sln 
Release
/project ALL_BUILD


How am I misapplying REGEX REPLACE?

--
Braden McDaniel
braden at endoframe.com

--

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