Known Hosts.sublime-syntax

%YAML 1.2
---
# https://www.sublimetext.com/docs/syntax.html
# https://man7.org/linux/man-pages/man8/sshd.8.html#SSH_KNOWN_HOSTS_FILE_FORMAT
# https://man.openbsd.org/sshd.8#SSH_KNOWN_HOSTS_FILE_FORMAT
name: Known Hosts
scope: text.known_hosts
version: 2
extends: SSH Crypto.sublime-syntax

file_extensions:
  - known_hosts

hidden_file_extensions:
  - known_hosts.old

contexts:
  main:
    - include: comments-number-sign
    - match: ^((@)(?:revoked|cert-authority))?
      captures:
        1: meta.annotation.known_hosts
           variable.annotation.known_hosts
        2: punctuation.definition.annotation.known_hosts
      push:
        - meta_scope: meta.line.known-host.known_hosts
        - include: pop-before-nl
        - include: pop-nl
        - include: punctuation-comma-sequence
        - include: ssh-fingerprint-with-label
        - include: ssh-key-types
        - include: hostname-or-ip-value

  hostname-or-ip-value:
    # Negation
    - include: operator-exclamation

    # Bracketed host
    - match: \[
      scope: punctuation.definition.string.begin.known_hosts
      push:
        - meta_scope: meta.brackets.host.known_hosts
        - match: (\])(?:(:)({{zero_to_65535}}))?
          captures:
            1: punctuation.definition.string.end.known_hosts
            2: punctuation.separator.sequence.known_hosts
            3: meta.number.integer.decimal.known_hosts
               constant.numeric.port-number.known_hosts
          pop: 1
        - include: operator-exclamation
        - include: ip-addresses
        - match: ''
          push:
            - meta_scope: meta.string.host.known_hosts
                          string.quoted.other.known_hosts
            - match: (?=,|\])
              pop: 1
            - include: wildcards
            - include: punctuation-dot-sequence

    # IP
    - include: ip-addresses

    # Hashed host
    - match: (\|)(\d+)(\|)({{base64_char}}{27}=)(\|)({{base64_char}}{27}=)
      scope: meta.string.host.obfuscated.known_hosts
      captures:
        1: punctuation.definition.known_hosts
        2: constant.numeric.integer.algorithm.known_hosts
        3: punctuation.definition.known_hosts
        4: string.unquoted.salt.known_hosts
        5: punctuation.definition.known_hosts
        6: string.unquoted.hash.known_hosts

    # Normal host
    - match: (?=\S)
      push: hostname

  hostname:
    - meta_content_scope: meta.string.host.known_hosts
                          string.unquoted.known_hosts
    - match: (?=[,\[\s])
      pop: 1
    - include: wildcards
    - include: punctuation-dot-sequence