Is it possible to accept custom command line parameters with Inno Setup

Question

I am preparing an installer with Inno Setup. But I\'d like to add an additional custom (none of the available parameters) command line parameters and would like to get the v

Answer 1

With InnoSetup 5.5.5 (and perhaps other versions), just pass whatever you want as a parameter, prefixed by a /

c:\> myAppInstaller.exe /foo=wiggle

and in your myApp.iss:

[Setup]
AppName = {param:foo|waggle}

The |waggle provides a default value if no parameter matches. Inno setup is not case sensitive. This is a particularly nice way to handle command line options: They just spring into existence. I wish there was as slick a way to let users know what command line parameters the installer cares about.

BTW, this makes both @knguyen's and @steve-dunn's answers somewhat redundant. The utility functions do exactly what the built-in {param: } syntax does.

Answer 2

In response to:

"With InnoSetup 5.5.5 (and perhaps other versions), just pass whatever you want as a parameter, prefixed by a /" "@NickG, yes, every constant you can expand by the ExpandConstant function"

• This is not the case. Trying to use a command line parameter in ExpandConstant in InnoSetup 5.5.6 results in a runtime error.

PS: I would have added a comment directly but apparently I dont have enough "reputation"

Answer 3

If you want to parse command line arguments from code in inno, then use a method similar to this. Just call the inno script from the command line as follows:

c:\MyInstallDirectory>MyInnoSetup.exe -myParam parameterValue

Then you can call the GetCommandLineParam like this wherever you need it:

myVariable := GetCommandLineParam('-myParam');

{ ================================================================== }
{ Allows for standard command line parsing assuming a key/value organization }
function GetCommandlineParam (inParam: String):String;
var
  LoopVar : Integer;
  BreakLoop : Boolean;
begin
  { Init the variable to known values }
  LoopVar :=0;
  Result := '';
  BreakLoop := False;

  { Loop through the passed in arry to find the parameter }
  while ( (LoopVar < ParamCount) and
          (not BreakLoop) ) do
  begin
    { Determine if the looked for parameter is the next value }
    if ( (ParamStr(LoopVar) = inParam) and
         ( (LoopVar+1) <= ParamCount )) then
    begin
      { Set the return result equal to the next command line parameter }
      Result := ParamStr(LoopVar+1);

      { Break the loop }
      BreakLoop := True;
    end;

    { Increment the loop variable }
    LoopVar := LoopVar + 1;
  end;
end;

Answer 4

Further to @DanLocks' answer, the {param:ParamName|DefaultValue} constant is documented near the bottom of the Constants page:

http://www.jrsoftware.org/ishelp/index.php?topic=consts

I found it quite handy for optionally suppressing the license page. Here is all I needed to add (using Inno Setup 5.5.6(a)):

[code]
{ If there is a command-line parameter "skiplicense=true", don't display license page }
function ShouldSkipPage(PageID: Integer): Boolean;
begin
  Result := False
  if PageId = wpLicense then
    if ExpandConstant('{param:skiplicense|false}') = 'true' then
      Result := True;
end;