detect has already been installed

Archive: detect has already been installed

peeratep
15th September 2006 06:57 UTC

detect has already been installed
how to check previous version install when setup!

Animaether
15th September 2006 08:46 UTC

When you install, write the version number to the registry when done installing, e.g.

( slashes "/" should be backslashes "\" - darn php tag. )

WriteRegStr HKCU "Software/YourCompany/YourProduct/" "version" "version number"

( above can be in the last section, or in .onInstSuccess, or.. etc.

Then when you run the installer, check for that value, e.g.

ReadRegStr$0 HKCU "Software/YourCompany/YourProduct/" "version"

The version number will then be in $0. If the key did not exist, it'll just be empty. So you can do some rudimentary things with it...


StrCmp $0 "" _noPreviousInstall

IntCmp$0 current_version _sameVersion _olderVersion _newerVersion


_noPreviousInstall:

;insert code to execute here when there has been no previous installation.

>goto _continue


_sameVersion:

;insert code to execute here when the old installed version is the same as the current version

goto _continue 


_olderVersion:

; insert code to execute here when the old installed version is older than the current version

goto _continue 


_newerVersion:

;insert code to execute here when the old installed version is /newer/ than the current version.

>goto _continue 


_continue:

;the rest of the code to continue with 

>

kichik
15th September 2006 12:22 UTC

Originally posted by Animaether
( slashes "/" should be backslashes "\" - darn php tag. )

Use the code tag instead.

Animaether
15th September 2006 12:54 UTC

haha.. yeah, we've been over this before (I was gone for a while) - I like the highlighting of PHP.

There should really be an NSIS tag added so syntax highlight while keeping the [code] formatting. I know, I know.. "will you write it?".. if I could! :)