最简单的解决方案是在安装之前删除安装文件夹中的所有文件。
如您所知,您可以使用[InstallDelete] section https://jrsoftware.org/ishelp/index.php?topic=installdeletesection为了那个原因。但这不允许您排除“数据”文件夹。
您可以改为编写 Pascal 脚本。看Inno Setup - 删除除数据子目录之外的整个应用程序文件夹 https://stackoverflow.com/q/36491213/850848。您可以致电DelTreeExceptSavesDir
从我对这个问题的回答来看事件函数:
procedure CurStepChanged(CurStep: TSetupStep);
begin
if CurStep = ssInstall then
begin
DelTreeExceptSavesDir(WizardDirValue);
end;
end;
如果您确实只想删除过时的文件,以避免删除和重新创建现有文件(什么是不是你的情况,当你使用ignoreversion
无论如何标志),您可以使用预处理器生成要为 Pascal 脚本安装的文件列表,并使用它来仅删除真正过时的文件。
#pragma parseroption -p-
#define FileEntry(DestDir) \
" FilesNotToBeDeleted.Add('" + LowerCase(DestDir) + "');\n"
#define ProcessFile(Source, Dest, FindResult, FindHandle) \
FindResult \
? \
Local[0] = FindGetFileName(FindHandle), \
Local[1] = Source + "\\" + Local[0], \
Local[2] = Dest + "\\" + Local[0], \
(Local[0] != "." && Local[0] != ".." \
? FileEntry(Local[2]) + \
(DirExists(Local[1]) ? ProcessFolder(Local[1], Local[2]) : "") \
: "") + \
ProcessFile(Source, Dest, FindNext(FindHandle), FindHandle) \
: \
""
#define ProcessFolder(Source, Dest) \
Local[0] = FindFirst(Source + "\\*", faAnyFile), \
ProcessFile(Source, Dest, Local[0], Local[0])
#pragma parseroption -p+
[Code]
var
FilesNotToBeDeleted: TStringList;
function InitializeSetup(): Boolean;
begin
FilesNotToBeDeleted := TStringList.Create;
FilesNotToBeDeleted.Add('\data');
{#Trim(ProcessFolder('build\exe.win-amd64-3.6', ''))}
FilesNotToBeDeleted.Sorted := True;
Result := True;
end;
procedure DeleteObsoleteFiles(Path: string; RelativePath: string);
var
FindRec: TFindRec;
FilePath: string;
FileRelativePath: string;
begin
if FindFirst(Path + '\*', FindRec) then
begin
try
repeat
if (FindRec.Name <> '.') and (FindRec.Name <> '..') then
begin
FilePath := Path + '\' + FindRec.Name;
FileRelativePath := RelativePath + '\' + FindRec.Name;
if FindRec.Attributes and FILE_ATTRIBUTE_DIRECTORY <> 0 then
begin
DeleteObsoleteFiles(FilePath, FileRelativePath);
end;
if FilesNotToBeDeleted.IndexOf(Lowercase(FileRelativePath)) < 0 then
begin
if FindRec.Attributes and FILE_ATTRIBUTE_DIRECTORY <> 0 then
begin
if RemoveDir(FilePath) then
begin
Log(Format('Deleted obsolete directory %s', [FilePath]));
end
else
begin
Log(Format('Failed to delete obsolete directory %s', [FilePath]));
end;
end
else
begin
if DeleteFile(FilePath) then
begin
Log(Format('Deleted obsolete file %s', [FilePath]));
end
else
begin
Log(Format('Failed to delete obsolete file %s', [FilePath]));
end;
end;
end;
end;
until not FindNext(FindRec);
finally
FindClose(FindRec);
end;
end
else
begin
Log(Format('Failed to list %s', [Path]));
end;
end;
procedure CurStepChanged(CurStep: TSetupStep);
begin
if CurStep = ssInstall then
begin
Log('Looking for obsolete files...');
DeleteObsoleteFiles(WizardDirValue, '');
end;
end;
对于其他选项,请参见Inno Setup:删除以前版本安装的文件 https://stackoverflow.com/q/46007792/850848.