Install only if external file exists

Question

I would like to instruct Inno Setup to install a certain external file only if does exist.

Like so:

Source: \"d:\\sources\\SomeDLL.dll\"; DestDir: {a         


        

Answer 1

Use the skipifsourcedoesntexist flag:

This flag instructs the compiler -- or Setup, if the external flag is also used -- to silently skip over the entry if the source file does not exist, instead of displaying an error message.

Answer 2

Try this flag:

onlyifdestfileexists

Only install the file if a file of the same name already exists on the user's system. This flag may be useful if your installation is a patch to an existing installation, and you don't want files to be installed that the user didn't already have.

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