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NSIS macro to prepend to system path during install / uninstall process
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!macro ProcessEnvPrependPath UN | |
;; ref: http://stackoverflow.com/a/32384667/1292238 | |
!ifndef ERROR_ENVVAR_NOT_FOUND | |
!define ERROR_ENVVAR_NOT_FOUND 203 | |
!endif | |
!if "${NSIS_PTR_SIZE}" <= 4 | |
!include LogicLib.nsh | |
Function ${UN}ProcessEnvPrependPath ; IN:Path OUT:N/A | |
System::Store S | |
Pop $1 | |
System::Call 'KERNEL32::GetEnvironmentVariable(t "PATH", t, i0)i.r0' | |
${If} $0 = 0 | |
System::Call 'KERNEL32::SetEnvironmentVariable(t "PATH", tr1)' | |
${Else} | |
StrLen $2 $1 | |
System::Call '*(&t$2,&t1,&t$0)i.r9' | |
StrCpy $3 '$1;' | |
System::Call 'KERNEL32::lstrcat(ir9, tr3)' | |
System::Call '*(&t$0)i.r8' | |
System::Call 'KERNEL32::GetEnvironmentVariable(t "PATH", ir8, ir0)i.r0' | |
System::Call 'KERNEL32::lstrcat(ir9, ir8)' | |
System::Call 'KERNEL32::SetEnvironmentVariable(t "PATH", ir9)' | |
System::Free $9 | |
${EndIf} | |
System::Store L | |
FunctionEnd | |
!endif | |
!macroend |
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NSIS macro to prepend to system path during install / uninstall process.
Usage: In installer section:
In uninstaller section: