iss: make mfc*.dll and msvc*.dll optional

mfc71.dll was only needed for Python2.4
msvc*.dll is similarly optional
Do not bail installer build if not found

contrib/win32/mercurial.iss

@@ -1,119 +1,119 b''
 ; Script generated by the Inno Setup Script Wizard.
 ; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!
 
 #ifndef VERSION
 #define FileHandle
 #define FileLine
 #define VERSION = "unknown"
 #if FileHandle = FileOpen(SourcePath + "\..\..\mercurial\__version__.py")
   #expr FileLine = FileRead(FileHandle)
   #expr FileLine = FileRead(FileHandle)
   #define VERSION = Copy(FileLine, Pos('"', FileLine)+1, Len(FileLine)-Pos('"', FileLine)-1)
 #endif
 #if FileHandle
   #expr FileClose(FileHandle)
 #endif
 #pragma message "Detected Version: " + VERSION
 #endif
 
 [Setup]
 AppCopyright=Copyright 2005-2009 Matt Mackall and others
 AppName=Mercurial
 AppVerName=Mercurial {#VERSION}
 InfoAfterFile=contrib/win32/postinstall.txt
 LicenseFile=COPYING
 ShowLanguageDialog=yes
 AppPublisher=Matt Mackall and others
 AppPublisherURL=http://mercurial.selenic.com/
 AppSupportURL=http://mercurial.selenic.com/
 AppUpdatesURL=http://mercurial.selenic.com/
 AppID={{4B95A5F1-EF59-4B08-BED8-C891C46121B3}
 AppContact=[e-mail]
 OutputBaseFilename=Mercurial-{#VERSION}
 DefaultDirName={pf}\Mercurial
 SourceDir=..\..
 VersionInfoDescription=Mercurial distributed SCM (version {#VERSION})
 VersionInfoCopyright=Copyright 2005-2009 Matt Mackall and others
 VersionInfoCompany=Matt Mackall and others
 InternalCompressLevel=max
 SolidCompression=true
 SetupIconFile=contrib\win32\mercurial.ico
 AllowNoIcons=true
 DefaultGroupName=Mercurial
 PrivilegesRequired=none
 
 [Files]
 Source: contrib\mercurial.el; DestDir: {app}/Contrib
 Source: contrib\vim\*.*; DestDir: {app}/Contrib/Vim
 Source: contrib\zsh_completion; DestDir: {app}/Contrib
 Source: contrib\hgk; DestDir: {app}/Contrib; DestName: hgk.tcl
 Source: contrib\win32\ReadMe.html; DestDir: {app}; Flags: isreadme
 Source: contrib\mergetools.hgrc; DestDir: {tmp};
 Source: contrib\win32\mercurial.ini; DestDir: {app}; DestName: Mercurial.ini; Check: CheckFile; AfterInstall: ConcatenateFiles;
 Source: contrib\win32\postinstall.txt; DestDir: {app}; DestName: ReleaseNotes.txt
 Source: dist\hg.exe; DestDir: {app}; AfterInstall: Touch('{app}\hg.exe.local')
 Source: dist\python*.dll; Destdir: {app}; Flags: skipifsourcedoesntexist
 Source: dist\library.zip; DestDir: {app}
-Source: dist\mfc*.dll; DestDir: {app}
-Source: dist\msvc*.dll; DestDir: {app}
+Source: dist\mfc*.dll; DestDir: {app}; Flags: skipifsourcedoesntexist
+Source: dist\msvc*.dll; DestDir: {app}; Flags: skipifsourcedoesntexist
 Source: dist\Microsoft.VC*.CRT.manifest; DestDir: {app}; Flags: skipifsourcedoesntexist
 Source: dist\Microsoft.VC*.MFC.manifest; DestDir: {app}; Flags: skipifsourcedoesntexist
 Source: dist\w9xpopen.exe; DestDir: {app}
 Source: dist\add_path.exe; DestDir: {app}
 Source: doc\*.html; DestDir: {app}\Docs
 Source: locale\*.*; DestDir: {app}\locale; Flags: recursesubdirs createallsubdirs
 Source: templates\*.*; DestDir: {app}\Templates; Flags: recursesubdirs createallsubdirs
 Source: CONTRIBUTORS; DestDir: {app}; DestName: Contributors.txt
 Source: COPYING; DestDir: {app}; DestName: Copying.txt
 
 [INI]
 Filename: {app}\Mercurial.url; Section: InternetShortcut; Key: URL; String: http://mercurial.selenic.com/
 
 [UninstallDelete]
 Type: files; Name: {app}\Mercurial.url
 
 [Icons]
 Name: {group}\Uninstall Mercurial; Filename: {uninstallexe}
 Name: {group}\Mercurial Command Reference; Filename: {app}\Docs\hg.1.html
 Name: {group}\Mercurial Configuration Files; Filename: {app}\Docs\hgrc.5.html
 Name: {group}\Mercurial Ignore Files; Filename: {app}\Docs\hgignore.5.html
 Name: {group}\Mercurial Web Site; Filename: {app}\Mercurial.url
 
 [Run]
 Filename: "{app}\add_path.exe"; Parameters: "{app}"; Flags: postinstall; Description: "Add the installation path to the search path"
 
 [UninstallRun]
 Filename: "{app}\add_path.exe"; Parameters: "/del {app}"
 
 [UninstallDelete]
 Type: files; Name: "{app}\hg.exe.local"
 [Code]
 var
   WriteFile: Boolean;
   CheckDone: Boolean;
 
 function CheckFile(): Boolean;
 begin
   if not CheckDone then begin
     WriteFile := True;
     if FileExists(ExpandConstant(CurrentFileName)) then begin
         WriteFile := MsgBox('' + ExpandConstant(CurrentFileName) + '' #13#13 'The file already exists.' #13#13 'Would you like Setup to overwrite it?', mbConfirmation, MB_YESNO) = idYes;
     end;
     CheckDone := True;
   end;
   Result := WriteFile;
 end;
 
 procedure ConcatenateFiles();
 var
   MergeConfigs: TArrayOfString;
 begin
   if LoadStringsFromFile(ExpandConstant('{tmp}\mergetools.hgrc'),MergeConfigs) then begin
     SaveStringsToFile(ExpandConstant(CurrentFileName),MergeConfigs,True);
   end;
 end;
 
 procedure Touch(fn: String);
 begin
   SaveStringToFile(ExpandConstant(fn), '', False);
 end;