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hosts.cson
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hosts.cson
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name: "Hosts file"
scopeName: "source.hosts"
fileTypes: [
"hosts"
"hosts.txt"
"HSTATH.40"
"HSTMIT.1115"
"SYSHST; HSTLCL 560"
]
firstLineMatch: "^;\\s+(?:DoD Internet|MIT/Stanford) Host Table(?:$|\\s)"
patterns: [include: "#main"]
repository:
main:
patterns: [
{include: "#legacy"}
{include: "#modern"}
]
# Modern hosts(5) file format
modern:
patterns: [
{include: "etc#comment"}
{include: "etc#ip"}
{include: "#loopback"}
{include: "#host"}
]
# Compressed form of IPv6's loopback address
loopback:
name: "constant.numeric.other.ip-address"
match: "(?<=\\s|^)(::)1(?=$|\\s)"
captures:
1: name: "punctuation.definition.ip-address.loopback"
# Human-friendly hostname
host:
name: "entity.name.host.domain.hosts"
match: "(?<=\\s|^|,)[^:\\s#,][^\\s#,]*"
captures:
0: patterns: [include: "etc#dot"]
# The original (pre-DNS) “HOSTS.TXT” database
legacy:
patterns: [
{include: "etc#commentSemi"}
{include: "#legacy-dod"}
{include: "#legacy-nic"}
]
# Later database format, maintained by ARPANET (RFC 952)
"legacy-dod":
name: "meta.definition.${1:/downcase}.hosts.legacy"
match: """(?x) ^ \\s*
(NET|GATEWAY|HOST|DOMAIN) \\s* # Record type
(:) \\s* ([^\\s:][^:\\r\\n]*) \\s* # IP address list
(?:(:) \\s* ([^\\s:][^:\\r\\n]*) \\s*)? # Name
(?:(:) \\s* ([^\\s:][^:\\r\\n]*|(?=:)) \\s*)? # CPU type
(?:(:) \\s* ([^\\s:][^:\\r\\n]*|(?=:)) \\s*)? # Operating systems
(?:(:) \\s* ([^\\s:][^:\\r\\n]*|(?=:)) \\s*)? # Protocols
(:)(?=\\s*(?:$|;))
"""
captures:
1: name: "storage.type.class.hosts"
2: patterns: [include: "etc#colon"]
3: name: "meta.list.addresses.hosts", patterns: [
{include: "etc#ipv4"}
{include: "etc#comma"}
{include: "#legacy-host"}
]
4: patterns: [include: "etc#colon"]
5: patterns: [include: "etc#comma", {include: "#host"}]
6: patterns: [include: "etc#colon"]
7: name: "meta.list.cpus.hosts", patterns: [{
name: "constant.language.cpu-type.hosts"
match: "[^\\s,:]+"
}, include: "etc#comma"]
8: patterns: [include: "etc#colon"]
9: name: "meta.list.systems.hosts", patterns: [{
name: "constant.language.operating-system.hosts"
match: "[^\\s,:]+"
}, include: "etc#comma"]
10: patterns: [include: "etc#colon"]
11: name: "meta.list.protocols.hosts", patterns: [{
name: "constant.other.protocol.hosts"
match: "[^\\s,:]+"
captures: 0: patterns: [include: "#legacy-sym"]
}, include: "etc#comma"]
12: patterns: [include: "etc#colon"]
# Earlier variant of “HOSTS.TXT” used at MIT/Stanford (RFC 608)
"legacy-nic":
patterns: [{
# NET <name>,<network-id>
name: "meta.definition.network.hosts.legacy"
match: "^\\s*(NET)\\s+([^\\s;,:]+)\\s*(,)\\s*(\\d+)(?=\\s*(?:$|;))"
captures:
1: name: "storage.type.class.hosts"
2: name: "entity.name.network.hosts"
3: patterns: [include: "etc#comma"]
4: patterns: [include: "etc#intNoExp"]
},{
# HOST <name>,<host-id>,<status>,<system>,<machine>,[<nicknames>]
name: "meta.definition.host.hosts.legacy"
match: """(?x) ^
\\s* (HOST) \\s+ ([^\\s,:]+) \\s* (,) \\s* # Name
(?: ((?:[A-Z]+ \\s+)? \\d[^\\s,:\\[\\]]*) # Host ID (single)
| ((\\[) ([^\\[\\]]+) (\\])) # Host IDs (list)
)
(?:(,) ([A-Z]*))? # Status
(?:(,) ([^,\\s]*))? # System
(?:(,) ([^,\\s]*))? # Machine
(?:(,) ((\\[)([^\\[\\]]*)(\\])))? # Nicknames
(?=\\s*(?:$|;))
"""
captures:
1: name: "storage.type.class.hosts"
2: name: "entity.name.host.hosts"
3: patterns: [include: "etc#comma"]
4: patterns: [include: "#legacy-host"]
5: name: "meta.array.list.hosts"
6: patterns: [include: "#legacy-sym"]
7: patterns: [include: "#legacy-host"]
8: patterns: [include: "#legacy-sym"]
9: patterns: [include: "etc#comma"]
10: name: "constant.language.status.hosts"
11: patterns: [include: "etc#comma"]
12: name: "constant.language.operating-system.hosts"
13: patterns: [include: "etc#comma"]
14: name: "constant.language.machine.hosts"
15: patterns: [include: "etc#comma"]
16: name: "meta.array.list.nicknames.hosts"
17: patterns: [include: "#legacy-sym"]
18: patterns: [include: "etc#comma", {include: "#host"}]
19: patterns: [include: "#legacy-sym"]
}]
# Host number, possibly prefixed by network name/type
"legacy-host":
patterns: [{
# No network specified; defaults to ARPA/RCC format
name: "meta.host-number.unprefixed.arpa.hosts.legacy"
begin: "\\s*(?=\\d)"
end: "(?!\\G)"
patterns: [include: "#legacy-host-innards"]
},{
name: "meta.host-number.prefixed.${1:/downcase}.hosts.legacy"
begin: "\\b(ARPA|RCC|CHAOS|LCS|SU)(?=$|\\s|;)"
end: "(?!\\G)"
beginCaptures:
1: name: "entity.name.tag.network.hosts.legacy"
patterns: [include: "#legacy-host-innards"]
}, include: "#legacy-host-innards"]
"legacy-host-innards":
patterns: [{
# CHAOS <OCTAL>
match: "(?<=CHAOS)\\G\\s+([0-7]+)\\b"
captures:
1: name: "constant.numeric.integer.int.octal.oct.hosts.legacy"
},{
# Octal pair representing subnet and host numbers
begin: """(?x) \\G (?=
(?: (?<=LCS) \\s+ [0-7]+ (?:/[0-7]+)? # LCS <S>/<H>
| (?<=SU) \\s+ [0-7]+ (?:\\#[0-7]+)? # SU <S>#<H>
) \\b(?!/|\\#)
) \\s*"""
end: "(?!\\G)"
applyEndPatternLast: yes
patterns: [
{match: "\\G\\d+", name: "constant.numeric.integer.int.octal.oct.subnet-number.hosts.legacy"}
{match: "(?!\\G)\\d+", name: "constant.numeric.integer.int.octal.oct.host-number.hosts.legacy"}
{include: "#legacy-sym"}
]
},{
# ARPA/RCCnet-formatted host number
match: "(?:^|\\G|(?<!\\s),)(?:(?<=ARPA|RCC)\\s+|\\s*)\\b(\\d+)(?:(/)(\\d+))?\\b(?!/|#)"
captures:
1: name: "constant.numeric.integer.int.decimal.dec.host-number.hosts.legacy"
3: name: "constant.numeric.integer.int.decimal.dec.imp-number.hosts.legacy"
2: patterns: [include: "#legacy-sym"]
}, include: "etc#comma"]
# Punctuation characters matched inside legacy hosts format
"legacy-sym":
patterns: [{
# Tuple separator
name: "meta.separator.hosts.legacy"
match: "(/)|(#)"
captures:
1: name: "punctuation.separator.slash.hosts.legacy"
2: name: "punctuation.separator.number-sign.hosts.legacy"
},{
# Opening square bracket
name: "punctuation.section.square.bracket.begin.hosts.legacy"
match: "\\["
captures:
0: name: "brackethighlighter.square"
},{
# Closing square bracket
name: "punctuation.section.square.bracket.end.hosts.legacy"
match: "\\]"
captures:
0: name: "brackethighlighter.square"
}]