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Editorial Team
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Asked: 2026-05-26T19:39:27+00:00

I’m trying to replace a string, inside of a file, with perl from inside

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I’m trying to replace a string, inside of a file, with perl from inside a Makefile.

InstallTo = $(PWD)/WebTest

BuildApache:
    mkdir -p WebTest
    cd Source/httpd; ./configure --prefix=$(InstallTo) --exec-prefix=$(InstallTo)
    cd Source/httpd; make; make install
    cd $(InstallTo)/conf; perl -pi -e 's/ServerRoot \"$(InstallTo)\"/ServerRoot/g' httpd.conf
    cd $(InstallTo)/conf; cp -f httpd.conf httpd.conf.orig

I’m not sure exactly what I’m doing though, I’ve just tried to modify the perl line from something I found on the net. I think its the \” thats messing things up but I don’t know enough about Perl to fix it.

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1 Answer

  1. Editorial Team

    You might want to try: 

    s|ServerRoot "$(InstallTo)"|ServerRoot|g

    You’re pasting a value with a slash in it as part of the search expression. It ends up as:

    s/ServerRoot \"PWD/WebTest\"/ServerRoot/g

    (Where PWD stands for any literal directory spec.) Since you can’t escape the slash, that’s always going to be a problem unless you use an alternative delimiter.

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