Refactor windows installer script to accomodate further translation. Also split it up so it is easier to maintain and extend.

src/windows/installer.nsi

@@ -0,0 +1,117 @@
+Section $(inst_qbt_req) ;"qBittorrent (required)"
+
+  SectionIn RO
+  
+  ; Set output path to the installation directory.
+  SetOutPath $INSTDIR
+  
+  ;Create 'translations' directory
+  CreateDirectory $INSTDIR\translations
+  
+  ; Put file there  
+  File "qbittorrent.exe"
+  File "qt.conf"
+  File /oname=translations\qt_ar.qm "translations\qt_ar.qm"
+  File /oname=translations\qt_bg.qm "translations\qt_bg.qm"
+  File /oname=translations\qt_ca.qm "translations\qt_ca.qm"
+  File /oname=translations\qt_cs.qm "translations\qt_cs.qm"
+  File /oname=translations\qt_da.qm "translations\qt_da.qm"
+  File /oname=translations\qt_de.qm "translations\qt_de.qm"
+  File /oname=translations\qt_es.qm "translations\qt_es.qm"  
+  File /oname=translations\qt_fi.qm "translations\qt_fi.qm"
+  File /oname=translations\qt_fr.qm "translations\qt_fr.qm"
+  File /oname=translations\qt_gl.qm "translations\qt_gl.qm"
+  File /oname=translations\qt_he.qm "translations\qt_he.qm"
+  File /oname=translations\qt_hu.qm "translations\qt_hu.qm"
+  File /oname=translations\qt_it.qm "translations\qt_it.qm"
+  File /oname=translations\qt_ja.qm "translations\qt_ja.qm"
+  File /oname=translations\qt_ko.qm "translations\qt_ko.qm"
+  File /oname=translations\qt_lt.qm "translations\qt_lt.qm"
+  File /oname=translations\qt_nl.qm "translations\qt_nl.qm"
+  File /oname=translations\qt_pl.qm "translations\qt_pl.qm"
+  File /oname=translations\qt_pt.qm "translations\qt_pt.qm"
+  File /oname=translations\qt_pt_BR.qm "translations\qt_pt_BR.qm"
+  File /oname=translations\qt_ru.qm "translations\qt_ru.qm"
+  File /oname=translations\qt_sk.qm "translations\qt_sk.qm"  
+  File /oname=translations\qt_sv.qm "translations\qt_sv.qm"
+  File /oname=translations\qt_tr.qm "translations\qt_tr.qm"
+  File /oname=translations\qt_uk.qm "translations\qt_uk.qm"
+  File /oname=translations\qt_zh_CN.qm "translations\qt_zh_CN.qm"
+  File /oname=translations\qt_zh_TW.qm "translations\qt_zh_TW.qm" 
+  
+  ; Write the installation path into the registry  
+  WriteRegStr HKLM "Software\qbittorrent" "InstallLocation" "$INSTDIR"
+  
+  ; Write the uninstall keys for Windows
+  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\qbittorrent" "DisplayName" "qBittorrent ${PROG_VERSION}"
+  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\qbittorrent" "UninstallString" '"$INSTDIR\uninst.exe"'
+  WriteRegDWORD HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\qbittorrent" "NoModify" 1
+  WriteRegDWORD HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\qbittorrent" "NoRepair" 1
+  WriteUninstaller "uninst.exe"  
+  
+SectionEnd
+
+; Optional section (can be disabled by the user)
+Section /o $(inst_dekstop) ;"Create Desktop Shortcut"
+
+  CreateShortCut "$DESKTOP\qBittorrent.lnk" "$INSTDIR\qbittorrent.exe"
+  
+SectionEnd
+
+Section $(inst_startmenu) ;"Create Start Menu Shortcut"
+
+  CreateDirectory "$SMPROGRAMS\qBittorrent"  
+  CreateShortCut "$SMPROGRAMS\qBittorrent\qBittorrent.lnk" "$INSTDIR\qbittorrent.exe"
+  CreateShortCut "$SMPROGRAMS\qBittorrent\Uninstall.lnk" "$INSTDIR\uninst.exe"
+  
+SectionEnd
+
+Section $(inst_torrent) ;"Open .torrent files with qBittorrent"
+
+  WriteRegStr HKEY_CLASSES_ROOT ".torrent" "" "qBittorrent"
+  WriteRegStr HKEY_CLASSES_ROOT ".torrent" "Content Type" "application/x-bittorrent"
+  WriteRegStr HKEY_CLASSES_ROOT "qBittorrent\shell" "" "open"
+  WriteRegStr HKEY_CLASSES_ROOT "qBittorrent\shell\open\command" "" '"$INSTDIR\qbittorrent.exe" "%1"'
+  WriteRegStr HKEY_CLASSES_ROOT "qBittorrent\Content Type" "" "application/x-bittorrent"
+  WriteRegStr HKEY_CLASSES_ROOT "qBittorrent\DefaultIcon" "" '"$INSTDIR\qbittorrent.exe",1'
+  
+  System::Call 'Shell32::SHChangeNotify(i ${SHCNE_ASSOCCHANGED}, i ${SHCNF_IDLIST}, i 0, i 0)'
+  
+SectionEnd
+
+Section $(inst_magnet) ;"Open magnet links with qBittorrent"
+
+  WriteRegStr HKEY_CLASSES_ROOT "Magnet" "" "Magnet URI"
+  WriteRegStr HKEY_CLASSES_ROOT "Magnet" "Content Type" "application/x-magnet"
+  WriteRegStr HKEY_CLASSES_ROOT "Magnet" "URL Protocol" ""
+  WriteRegStr HKEY_CLASSES_ROOT "Magnet\DefaultIcon" "" '"$INSTDIR\qbittorrent.exe",1'
+  WriteRegStr HKEY_CLASSES_ROOT "Magnet\shell" "" "open"
+  WriteRegStr HKEY_CLASSES_ROOT "Magnet\shell\open\command" "" '"$INSTDIR\qbittorrent.exe" "%1"'
+  
+  System::Call 'Shell32::SHChangeNotify(i ${SHCNE_ASSOCCHANGED}, i ${SHCNF_IDLIST}, i 0, i 0)'
+  
+SectionEnd
+
+;--------------------------------
+
+Function .onInit	
+    ;Search if qBittorrent is already installed.
+    FindFirst $0 $1 "$INSTDIR\uninst.exe"
+    FindClose $0
+    StrCmp $1 "" done
+    
+    ;Display a confirmation dialog
+    MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION \
+    "qBittorrent is already installed. $\n$\nClick $\"OK$\" to remove the \
+    previous version or $\"Cancel$\" to cancel this upgrade." IDOK uninst
+    Abort
+    
+    
+    uninst:
+    ;Run the uninstaller of the previous install.
+	ExecWait '"$INSTDIR\uninst.exe" _?=$INSTDIR'
+			
+    done:    
+    !insertmacro MUI_LANGDLL_DISPLAY
+	
+FunctionEnd