detect has already been installed

peeratep · 15th September 2006, 05:57

how to check previous version install when setup!

Animaether · 15th September 2006, 07:46

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

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

PHP Code:


			
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.

PHP Code:


			
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...

PHP Code:


			
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, 11:22

Quote:

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

Use the code tag instead.

Animaether · 15th September 2006, 11:54

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!

15th September 2006, 05:57	#1
peeratep Junior Member Join Date: Sep 2006 Posts: 28	detect has already been installed how to check previous version install when setup!

15th September 2006, 07:46	#2
Animaether Major Dude Join Date: Jun 2001 Posts: 1,173	When you install, write the version number to the registry when done installing, e.g. ( slashes "/" should be backslashes "\" - darn php tag. ) PHP Code: `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. PHP Code: `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... PHP Code: 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

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15th September 2006, 11:54	#4
Animaether Major Dude Join Date: Jun 2001 Posts: 1,173	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!