Fix host ordering in .ssh/config output

[pikeas]

Breaking out from #190.

Example ssh config:

Host foo*.bar
    IdentityFile ~/ssh/special

Host *.bar
    User me
    IdentitifyFile ~/ssh/regular

ssh uses the first value found for each setting. This config will use the regular key for all *.bar servers but use the special key for all foo*.bar servers. But if I create the same config in assh:

hosts:
    "foo*.bar":
        identityfile: ~/ssh/special
    "*.bar":
        identityfile: ~/ssh/regular
        user: me

This generates the following config file:

Host *.bar
    IdentityFile ~/ssh/regular
    User me

Host foo*.bar
    IdentityFile ~/ssh/special

The ordering has been reversed! This will use the wrong key file for foo servers.

[mmlb]

@moul any pointers on this, this is biting my quite badly (but for User: config), I'd take a stab at fixing this.

[rafi]

This is the biggest drawback of assh. 😞 Instead of preserving the origin order, assh sorts the new config by alphanumeric. With regular ssh, the order is extremely important, as it can allow for wildcards+overridable variables, i.e.:

hosts:
  stg-bastion:
    User: bumblebee
    IdentityFile: ~/.ssh/acme/bumblebee

  "stg-*":
    User: optimus
    IdentityFile: ~/.ssh/acme/staging

With regular ssh, ssh stg-bastion would use bumblebee. Unfortunately with assh, the order will reverse and ssh stg-bastion would always use optimus user.

@moul Even tweaking the sorting algorithm to order * at the end would solve this, as wildcards will be placed lower than hosts with a fixed-name.

For example (sorting * as the largest character):

Host int-bastion
Host int-admin
Host int-*
Host stg-bastion
Host stg-*
Host prd-bastion
Host prd-db-01
Host prd-db-02
Host prd-*

Unfortunately now * is considered higher than a-z0-9:

Host int-*
Host int-bastion
Host int-admin
Host stg-*
Host stg-bastion
Host prd-*
Host prd-bastion
Host prd-db-01
Host prd-db-02

Any intention of solving this wildcards+overrides situation?

[Phill93]

What is the status here? I have the same problem