Pharo Script of the Day: Execute command in a MSYS2 MinGW64 context

For this to work first ensure you have the MSYS2 bin directory added to the PATH environment variable. Just run the following from command line and add "c:\msys64\usr\bin\" to the end of the PATH variable:

systempropertiesadvanced

We will use ProcessWrapper, although with limited features, it works perfectly for simple tasks. And now you can run all those complex bash shell commands from Pharo :) For example to get the CPU frequencies in GHz:

| process output answer cmd |

process := ProcessWrapper new.
cmd := '"{ echo scale=2; awk ''/cpu MHz/ {print $4 "" / 1000""}'' /proc/cpuinfo; } | bc"'.
output := process
 useStdout;
 useStderr;
 startWithShellCommand: 'set CHERE_INVOKING=1 & set MSYSTEM=MINGW64 & set MSYS2_PATH_TYPE=inherit & "c:\msys64\usr\bin\bash.exe" -c ' , cmd;
 upToEnd.
^ (answer := process errorUpToEnd) isEmpty not
 ifTrue: [ answer ]
 ifFalse: [ output ].