How to read JSON data in batch script - json

Question

I have a JSON file, named "Config.json", that looks like this:
{ "RunEnvironment": "DEV"}
In a batch file under the same directory, I want to read the value of the "RunEnvironment" element.
My batch script would look like:
if [jsonElement] == 'DEV' (
:: do something
)
Can anyone show me how to do this?

Answer 1

In PowerShell for example, you could do:
> If((Get-Content '.\Config.json'|ConvertFrom-Json).RunEnvironment -eq 'DEV'){"is DEV:Whatever"}
is DEV:Whatever
To be on topic on cmd line
> for /f "tokens=1,2 delims=:{} " %A in (Config.json) do #If "%~B"=="Dev" #Echo (%~A = %~B)
(RunEnvironment=DEV)
In a batch file
#Echo off
for /f "tokens=1,2 delims=:{} " %%A in (Config.json) do (
If "%%~B"=="Dev" Echo (%%~A=%%~B^)
)
The Echo (%%~A=%%~B^) could be replaced with whatever you plan to do.

Answer 2

If all you need to do is perform a specific command only if the value of RunEnvironment is DEV then this should be all you require, (from a batch-file or the command-line):
"%__APPDIR__%FindStr.exe" /IRC:"\"RunEnvironment\":\ \ *\"DEV\"" "Config.json">NUL 2>&1&&Echo Your command here
You'd simply replace Echo Your command here with your intended command.

Answer 3

Yo can do in this way
#echo off
set string={ "RunEnvironment": "DEV" }
for /f "tokens=3,5" %%a in ('echo %string%') do set d=%%~a
if "%d%" == "DEV" echo %d%
pause & goto :EOF

Answer 4

In a batch file:
#ECHO off
SET "FilenameForJsonFile=Config.json"
SET "FilenameForRunEnvironment=RunEnvironment.txt"
powershell -Command "Select-String -Pattern 'RunEnvironment\"\: \".*?\"' .\%FilenameForJsonFile% ^| ForEach-Object { $_.Matches.Value.substring(18,$_.Matches.Value.Length-19) }>%FilenameForRunEnvironment%
FOR /f "delims=" %%x IN (%FilenameForRunEnvironment%) DO SET JsonElement=%%x
IF %JsonElement%==DEV (ECHO development environment) ELSE (ECHO abc123 environment)