~/.ssh/config can contain directives such as Include which result in a configuration state that cannot be found in any single file. `ssh -G [host]` will print out the fully processed config for a particular host, but information such as host wildcards cannot be authoritatively determined through this mechanism.

This enhancement request is for a command line parameter that will print the entire configuration after it is loaded. Ideally in a format that could be used as a standalone ~/.ssh/config, and with the contents matching the layout of the original included config files, but some other consistent and machine readable format would still be useful.

My use case involves some existing helper scripts that check for the existence of some configuration in ~/.ssh/config. Those scripts cannot see that configuration in my ~/.ssh/configX which is included in my main config, but I also don't want them to search ~/.ssh/* because that would cover files that aren't included or otherwise loaded. As I found myself considering writing my own ssh config preprocessor based on readconf.c I decided this request might be in order.

Example:
% cat ~/.ssh/config
Host foo
    HostName foo.foo.foo
Include configA
Include configB
% cat ~/.ssh/configA
Host bar
    HostName bar.bar.bar
% cat ~/.ssh/configB
Host foo
    User foouser
% ssh --print-config-ideal
Host foo
    HostName foo.foo.foo
Host bar
    HostName bar.bar.bar
Host foo
    User foouser
% ssh --print-config-acceptable
Host foo
    HostName foo.foo.foo
    User foouser
Host bar
    HostName bar.bar.bar