2. NSIS Discussion
  3. IfFileExists

Archive: IfFileExists


csunil
5th February 2004 03:18 UTC

IfFileExists
Hi,

I want to do something like

---------
IfFileExists "$INSTDIR\Manual\*.*"
{
CreateDirectory "$SMPROGRAMS\MySoft\${PRODUCT}\Help"

IfFileExists "$INSTDIR\Manual\Manual.html" "" +2
CreateShortCut "$SMPROGRAMS\MySoft\${PRODUCT}\Help\Manual (English).lnk" "$INSTDIR\Manual\Manual.html" "" "$INSTDIR\Manual\Manual.html" 0
}
---------

How can I do this "{ }" (begin-end) sort of thing with NSIS syntax? I've tried it with the labels with no success.

Also, I've seen that in makensis.nsi you add a "+2" as a parameter of IfFileExists. Why is that?

Vytautas
5th February 2004 07:45 UTC

Try this code:


IfFileExists "$INSTDIR\Manual\*.*" 0 NotFileExisted
  CreateDirectory "$SMPROGRAMS\MySoft\${PRODUCT}\Help"
  IfFileExists "$INSTDIR\Manual\Manual.html" "" +2
    CreateShortCut "$SMPROGRAMS\MySoft\${PRODUCT}\Help\Manual (English).lnk" \
"$INSTDIR\Manual\Manual.html" "" "$INSTDIR\Manual\Manual.html" 0
NotFileExisted:
+2 means that the installer should skip the next 2 lines.

Vytautas

csunil
5th February 2004 08:32 UTC

Yes, I tried something similar but it didn't work. This is my current code:


  Section $(TITLE_StartMenuShortCuts) StartMenuShortCuts
    CreateDirectory "$SMPROGRAMS\MySoft\${PRODUCT}"
    
    IfFileExists "$INSTDIR\Manual\*.*" 0 NotFileExisted
      CreateDirectory "$SMPROGRAMS\MySoft\${PRODUCT}\Help"
      
      IfFileExists "$INSTDIR\Manual\Manual.html" "" +2
        CreateShortCut "$SMPROGRAMS\MySoft\${PRODUCT}\Help\Manual (English).lnk" "$INSTDIR\Manual\Manual.html" "" "$INSTDIR\Manual\Manual.html" 0
    NotFileExisted:
    
    CreateShortCut "$SMPROGRAMS\MySoft\${PRODUCT}\${PRODUCT}.lnk" "$INSTDIR\${PRODUCT_EXENAME}" "" "$INSTDIR\${PRODUCT_EXENAME}" 0
    CreateShortCut "$SMPROGRAMS\MySoft\${PRODUCT}\Uninstall ${PRODUCT}.lnk" "$INSTDIR\uninstall.exe" "" "$INSTDIR\uninstall.exe" 0
  SectionEnd

What I want to do is, add a shortcut in the start menu to a manual (.html file) ONLY if the manual was installed. Manual installation is optional, it is in a section:


SubSection $(TITLE_Manual) Manual
  Section $(TITLE_ManualEnglish) ""
    SetOutPath $INSTDIR\Help
    File "${FILESPATH}\Help\Manual.html"
  SectionEnd
SubSectionEnd

If I can't use IfFileExists to check if the manual was installed, can I at least check if the section of the english manual was checked for installation? The problem is that I will have multiple translations of the manual so it will be something like:


SubSection $(TITLE_Manual) Manual
  Section $(TITLE_ManualEnglish) ""
    SetOutPath $INSTDIR\Help
    File "${FILESPATH}\Help\Manual.html"
  SectionEnd
  Section $(TITLE_ManualLanguageX) ""
    SetOutPath $INSTDIR\Help
    File "${FILESPATH}\Help\ManualLANGX.html"
  SectionEnd
  ...
SubSectionEnd


So I will need to check if at least one of the manual translations was checked to install.

kichik
5th February 2004 10:15 UTC

You should use the LogicLib. See Examples\LogicLib.nsi and search for FileExists. It will be much easier.

csunil
5th February 2004 22:42 UTC

Thanks for the tip. I finally decided to give up FileExists and use variables to know if the person decided to install X translation of the help file. Ej. something like


SubSection $(TITLE_Manual) Manual
  var "ManualEnglish"
  var "ManualLangX"

  ; I use this to initialize variables
  Section "" ""
    StrCpy $ManualEnglish "F"
    StrCpy $ManualLangX "F"
  SectionEnd

  Section $(TITLE_ManualEnglish) ""
    StrCpy $ManualEnglish "T"
    SetOutPath $INSTDIR\Help
    File "${FILESPATH}\Help\Manual.html"
  SectionEnd

  Section $(TITLE_ManualLangX) ""
    StrCpy $ManualLangX "T"
    SetOutPath $INSTDIR\Help
    File "${FILESPATH}\Help\ManualLangX.html"
  SectionEnd


and then, on the create shortcuts section:


  ${If} $ManualEnglish == "T"
    CreateShortCut "$SMPROGRAMS\MySoft\${PRODUCT}\Help\Manual (English).lnk" "$INSTDIR\Manual\Manual.html" "" "$INSTDIR\Manual\Manual.html" 0
  ${EndIf}
  ${If} $ManualLangX == "T"
    CreateShortCut "$SMPROGRAMS\MySoft\${PRODUCT}\Help\Manual (Español).lnk" "$INSTDIR\Manual\ManualLangX.html" "" "$INSTDIR\Manual\ManualLangX.html" 0
  ${EndIf}


My questions:

- Is there an easier way to use boolean variables without using StrCpy?
- Is there an easier way to check if a section was selected for installation?
- How can I do something like:

  ${If} $ManualEnglish == "T" ${or} $ManualLangX == "T"
    CreateDirectory "$SMPROGRAMS\MySoft\${PRODUCT}\Help"

I need that because I need to create the main "Help" entry in the start menu only if at least one of the translations of the manual were selected to install.

kichik
6th February 2004 13:31 UTC

Is there an easier way to use boolean variables without using StrCpy?
No.
Is there an easier way to check if a section was selected for installation?
Use LogicLib's ${SectionIsSelected}.
How can I do something like...
Maybe: if condition 1, add 1 to some var; if condition 2, add 1 to some var; if some var = 2, create directory. With StrCmp it's a lot easier:

StrCmp $0 T 0 skip
StrCmp $1 T 0 skip
CreateDirectory ...
skip:

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