How to read a command line parameter given to an uninstaller?
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16-09-2020 - |
Question
Using NSIS, how can I read a (optional) command-line parameter provided to an uninstaller?
I don't need to read it by name-- just reading the first parameter given could be enough.
Solution
Use the GetParameters and GetOptions helper functions in FileFunc.nsh (Included with NSIS)
OTHER TIPS
For anyone else's benefit, here's the actual code I used.
Program executed with parameter:
C:\path\to\program.exe -SELECT-DATA=FALSE
Then inside the uninstaller's un.onInit
method:
Function un.onInit
${GetParameters} $R0
${GetOptions} $R0 "-SELECT-DATA=" $R1
MessageBox MB_OK "Value read: $R1"
FunctionEnd
Will pop up a message box with the value: FALSE
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