Parsing string in batch file

Question

I have the following string:

MyProject/Architecture=32bit,BuildType=Debug,OS=winpc

I would like to be able to grab the values 32bit, Debug, and

Answer 1

Here is an interesting solution that doesn't care how many or what order the name=value pairs are specified. The trick is to replace each comma with a linefeed character so that FOR /F will iterate each name=value pair. This should work as long as there is only one / in the string.

@echo off
setlocal enableDelayedExpansion
set "str=MyProject/Architecture=32bit,BuildType=Debug,OS=winpc"

::Eliminate the leading project info
set "str=%str:*/=%"

::Define a variable containing a LineFeed character
set LF=^


::The above 2 empty lines are critical - do not remove

::Parse and set the values
for %%A in ("!LF!") do (
  for /f "eol== tokens=1* delims==" %%B in ("!str:,=%%~A!") do set "%%B=%%C"
)

::Display the values
echo Architecture=%Architecture%
echo BuildType=%BuildType%
echo OS=%OS%

With a bit more code it can selectively parse out only name=value pairs that we are interested in. It also initializes the variables to undefined in case the variable is missing from the string.

@echo off
setlocal enableDelayedExpansion
set "str=MyProject/Architecture=32bit,BuildType=Debug,OS=winpc"

::Eliminate the leading project info
set "str=%str:*/=%"

::Define a variable containing a LineFeed character
set LF=^


::The above 2 empty lines are critical - do not remove

::Define the variables we are interested in
set "vars= Architecture BuildType OS "

::Clear any existing values
for %%A in (%vars%) do set "%%A="

::Parse and conditionally set the values
for %%A in ("!LF!") do (
  for /f "eol== tokens=1* delims==" %%B in ("!str:,=%%~A!") do (
    if !vars: %%B ! neq !vars! set "%%B=%%C"
  )
)

::Display the values
for %%A in (%vars%) do echo %%A=!%%A!