Create powershell script to execute and generate a log file for R codes-CodePudding

I'm quite new to this shell scripts. I have 4 scripts A10 to A40 written in R. Each file throws lots of messages in the interim. I want to write a script to execute all these 4 files sequentially and capture all the messages in a log file separately. The name of the log file should be ABC-yyyy-mm-dd-hh-mm-ss.log. It should not be overwritten next time when I execute the shell script. I searched in the google but couldn't find any document that could help me.

CodePudding user response：

Consider the following PowerShell script enumerating multiple Rscript command steps with all output (information, warnings, errors) redirected to a date-stamped log file. As information, Rscript.exe is the batch job executable, designed to run .R scripts at command line. See R.exe, Rcmd.exe, Rscript.exe and Rterm.exe: what's the difference?.

Below assumes you have the R installation bin folder (where Rscript.exe sits) in Path environment variable for PowerShell to recognize Rscript. Also echo commands are added to timestamp each R script run. Please adjust file names and paths as needed.

PowerShell (save as .ps1)

cd "C:\path\to\working\directory"

& {
    echo "`nExecution Start: $(Get-Date -format 'u')"

    echo "`nSTEP 1: R_A10_Script.R - $(Get-Date -format 'u')"
    Rscript Run_A10_Script.R

    echo "`nSTEP 2: Run_A20_Script.R - $(Get-Date -format 'u')"
    Rscript Run_A20_Script.R
    
    echo "`nSTEP 3: Run_A20_Script.R  - $(Get-Date -format 'u')"
    Rscript Run_A30_Script.R

    echo "`nSTEP 4: Run_A20_Script.R - $(Get-Date -format 'u')"
    Rscript Run_A40_Script.R
    
    echo "`nExecution End: $(Get-Date -format 'u')"

} 3>&1 2>&1 > "ABC-$(Get-Date -format 'yyyy-MM-dd-HH-ss').log"

To run above script, simply call PowerShell.exe at command line, referencing .ps1 script with -File argument. In Windows Explorer, you can hold Shift Right Click on mouse/touchpad and select "Open PowerShell here" to launch PS terminal in any directory:

PowerShell -ExecutionPolicy bypass -File RunRScripts.ps1