Unable to extract SO's data dump file by Mac

Question

I run the following Gert's extract command to the data dump file which format .7z seems to be a problem:

extract () {
   if [ -f $1 ] ; then
       case $1 in
           *.tar.bz2)   tar xvjf $1    ;;
           *.tar.gz)    tar xvzf $1    ;;
           *.bz2)       bunzip2 $1     ;;
           *.rar)       unrar x $1       ;;
           *.gz)        gunzip $1      ;;
           *.tar)       tar xvf $1     ;;
           *.tbz2)      tar xvjf $1    ;;
           *.tgz)       tar xvzf $1    ;;
           *.zip)       unzip $1       ;;
           *.Z)         uncompress $1  ;;
           *.7z)        7z x $1        ;;
           *)           echo "don't know how to extract '$1'..." ;;
       esac
   else
       echo "'$1' is not a valid file!"
   fi
 }

I run it to the dump file. I get

extract so-export-2009-06.7z       
extract:13: command not found: 7z

This suggested that I do not have 7z to extract files. I installed the app p7zip by MacPorts unsuccessfully. It did not start to act as 7z unzipper.

How can you unzip SO's data dump?

Answer 1

Edit:

try using 7za instead of 7z as the executable name, as it appears that is what the port installs

so change the line

*.7z)        7z x $1        ;;

to

*.7z)        7za x $1        ;;