backticks

I am looping through a list of clearcase files to see if the text "Merge <-" is not part of the output of ct describe . I have tried running a while loop on this list of clearcase files then appending it to another file if it meets my desired condition. Below is the exact logic I used: 16 FILTER_LIST=cut -f1 -d'@' branchmerge_versions.txt 17 touch temp.txt 18 echo $FILTER_LIST > temp.txt 19 20 while read t; do 21 isMerged=`cleartool describe t | grep -e "Merge <-"` 22 if [[ "x$isMerged" == "x" ]]; then 23 echo "$t" >> filesToMerge.txt 24 fi 25 done < temp.txt 26 Running bash -n on the script

i'm trying to do shell command then save the output into variable using shell script. So i use backticks like this : out=`ls -l` print $out that code is working fine,and i can use it for any other shell command, but when i try to do 'python --version' to check python version. i got weird problem. The backtick is not working for "python --version" command while it's working fine with any other commands, it prints the output to the screen and save nothing to the variable $out. so if i do : out =`python --version` print "my python version is "$out result: Python 2.6.1 my python version is also i

I'm currently working on a Rails application that serves as an Updater for another Rails application. I have the update process working, Download new release zip Extract to proper location Sync Assets Bundle install Precompile Assets Start server with - bundle exec rails server I'm having an issue with the last step. When I run: Dir.chdir('../other-project') `bundle exec rails server -d -p 3000` from the updater app it seems to be pulling from the updaters bundle and not the new application bundle that it should be pulling from. The updater is written in Rails 4 and the app it is updating is

I need to do the equivalent of set ENVAR=`some-command` In a windows/cmd.exe script. Cygwin is not an option. For bonus marks: Is there some cmd.exe equivalent of backticks in general? A quick and dirty way would be redirecting it to a file and then reading this, e.g. some-command>out.txt set /p ENVAR=<out.txt I think for can also help you, but I don't remember the exact syntax. Try something like for /f "usebackq" %x in (`some-command`) do set ENVAR=%x I probably forgot some token or delim in the options... Not "probably", it is absolutely a must to specify "delims=" as last token (means, no

It seems that variables in backticks are not expanded when passed onto the readpipe function. If I override the readpipe function, how do I expand variables? BEGIN { *CORE::GLOBAL::readpipe = sub {print "Run:@_\n"}; } `ls /root`; my $dir = "/var"; `ls $dir`; Running this gives: Run:ls /root Run:ls $dir I am trying to mock external calls for a test code that I am writing. If there is a CPAN module somewhere which can help in taking care of all this, that would help too. Update : I have decided to use a really ugly workaround to my problem. It turns out that using readpipe() instead of backticks