logs

var AppBeforeCommaRegexp = `([^,]*)` // %a

var AppBeforeQuoteRegexp = `([^"]*)` // %a

var AppBeforeSpaceRegexp = `(\S*)` // %a

var AppInsideBracketsRegexp = `(\[unknown\]|[^,\]]*)` // %a

var BackendTypeRegexp = `([\w ]+)` // %b

var DbRegexp = `(\S*)` // %d

var HerokuPostgresDebugRegexp = regexp.MustCompile(`^(\w+ \d+ \d+:\d+:\d+ \w+ app\[postgres\] \w+ )?\[(\w+)\] \[\d+-\d+\] (.+)`)

var HostAndPortRegexp = `(.+(?:\(\d+\))?)?` // %r

var HostRegexp = `(\S*)` // %h

var LevelAndContentRegexp = `(\w+):\s+(.*\n?)$`

var LogLineCounterRegexp = `(\d+)` // %l

var LogPrefixAmazonRdsRegexp = regexp.MustCompile(`(?s)^` + TimeRegexp + `:` + HostAndPortRegexp + `:` + UserRegexp + `@` + DbRegexp + `:\[` + PidRegexp + `\]:` + LevelAndContentRegexp)

var LogPrefixAzureRegexp = regexp.MustCompile(`(?s)^` + TimeRegexp + `-` + SessionIdRegexp + `-` + LevelAndContentRegexp)

var LogPrefixCustom10Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `\]: \[` + LogLineCounterRegexp + `-1\] db=` + DbRegexp + `,user=` + UserRegexp + ` ` + LevelAndContentRegexp)

var LogPrefixCustom11Regexp = regexp.MustCompile(`(?s)^pid=` + PidRegexp + `,user=` + UserRegexp + `,db=` + DbRegexp + `,app=` + AppBeforeCommaRegexp + `,client=` + HostRegexp + ` ` + LevelAndContentRegexp)

var LogPrefixCustom12Regexp = regexp.MustCompile(`(?s)^user=` + UserRegexp + `,db=` + DbRegexp + `,app=` + AppBeforeCommaRegexp + `,client=` + HostRegexp + ` ` + LevelAndContentRegexp)

var LogPrefixCustom13Regexp = regexp.MustCompile(`(?s)^` + PidRegexp + `-` + TimeRegexp + `-` + SessionIdRegexp + `-` + LogLineCounterRegexp + `-` + HostRegexp + `-` + UserRegexp + `-` + DbRegexp + `-` + TimeRegexp + ` ` + LevelAndContentRegexp)

var LogPrefixCustom14Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `\]\[` + BackendTypeRegexp + `\]\[` + VirtualTxRegexp + `\]\[` + TransactionIdRegexp + `\] (?:\[user=` + UserRegexp + `,db=` + DbRegexp + `,app=` + AppInsideBracketsRegexp + `\] )?` + LevelAndContentRegexp)

var LogPrefixCustom15Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `\] ` + `(?:` + UserRegexp + `@` + DbRegexp + ` )?` + LevelAndContentRegexp)

var LogPrefixCustom16Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `\] ` + `(?:` + UserRegexp + `@` + DbRegexp + ` ` + HostRegexp + ` )?` + LevelAndContentRegexp)

var LogPrefixCustom1Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `\]\[` + VirtualTxRegexp + `\] : \[` + LogLineCounterRegexp + `-1\] (?:\[app=` + AppInsideBracketsRegexp + `\] )?` + LevelAndContentRegexp)

var LogPrefixCustom2Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `-` + LogLineCounterRegexp + `\] ` + `(?:` + UserRegexp + `@` + DbRegexp + ` )?` + LevelAndContentRegexp)

var LogPrefixCustom3Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `\] (?:\[user=` + UserRegexp + `,db=` + DbRegexp + `,app=` + AppInsideBracketsRegexp + `\] )?` + LevelAndContentRegexp)

var LogPrefixCustom4Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `\] (?:\[user=` + UserRegexp + `,db=` + DbRegexp + `,app=` + AppBeforeCommaRegexp + `,host=` + HostRegexp + `\] )?` + LevelAndContentRegexp)

var LogPrefixCustom5Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `\]: \[` + LogLineCounterRegexp + `-1\] user=` + UserRegexp + `,db=` + DbRegexp + ` - PG-` + SqlstateRegexp + ` ` + LevelAndContentRegexp)

var LogPrefixCustom6Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `\]: \[` + LogLineCounterRegexp + `-1\] user=` + UserRegexp + `,db=` + DbRegexp + `,app=` + AppBeforeCommaRegexp + `,client=` + HostRegexp + ` ` + LevelAndContentRegexp)

var LogPrefixCustom7Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `\]: \[` + LogLineCounterRegexp + `-1\] \[trx_id=` + TransactionIdRegexp + `\] user=` + UserRegexp + `,db=` + DbRegexp + ` ` + LevelAndContentRegexp)

var LogPrefixCustom8Regexp = regexp.MustCompile(`(?s)^\[` + PidRegexp + `\]: \[` + LogLineCounterRegexp + `-1\] db=` + DbRegexp + `,user=` + UserRegexp + ` ` + LevelAndContentRegexp)

var LogPrefixCustom9Regexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` ` + HostAndPortRegexp + ` ` + UserRegexp + ` ` + AppBeforeSpaceRegexp + ` \[` + SessionIdRegexp + `\] \[` + PidRegexp + `\] ` + LevelAndContentRegexp)

var LogPrefixHeroku1Regexp = regexp.MustCompile(`^ sql_error_code = ` + SqlstateRegexp + " " + LevelAndContentRegexp)

var LogPrefixHeroku2Regexp = regexp.MustCompile(`^ sql_error_code = ` + SqlstateRegexp + ` time_ms = "` + TimeRegexp + `" pid="` + PidRegexp + `" proc_start_time="` + TimeRegexp + `" session_id="` + SessionIdRegexp + `" vtid="` + VirtualTxRegexp + `" tid="` + TransactionIdRegexp + `" log_line="` + LogLineCounterRegexp + `" (?:database="` + DbRegexp + `" connection_source="` + HostAndPortRegexp + `" user="` + UserRegexp + `" application_name="` + AppBeforeQuoteRegexp + `" )?` + LevelAndContentRegexp)

var LogPrefixNoTimestampUserDatabaseAppRegexp = regexp.MustCompile(`(?s)^\[user=` + UserRegexp + `,db=` + DbRegexp + `,app=` + AppInsideBracketsRegexp + `\] ` + LevelAndContentRegexp)

var LogPrefixSimpleRegexp = regexp.MustCompile(`(?s)^` + TimeRegexp + ` \[` + PidRegexp + `\] ` + LevelAndContentRegexp)

var PidRegexp = `(\d+)` // %p

var RecommendedPrefixIdx = 4

var RsyslogHostnameRegxp = `(\S+)`

var RsyslogLevelAndContentRegexp = `(?:(\w+):\s+)?(.*\n?)$`

var RsyslogProcessNameRegexp = `(\w+)`

var RsyslogRegexp = regexp.MustCompile(`^` + RsyslogTimeRegexp + ` ` + RsyslogHostnameRegxp + ` ` + RsyslogProcessNameRegexp + `\[` + PidRegexp + `\]: ` + SyslogSequenceAndSplitRegexp + ` ` + RsyslogLevelAndContentRegexp)

var RsyslogTimeRegexp = `(\w+\s+\d+ \d{2}:\d{2}:\d{2})`

var SessionIdRegexp = `(\w+\.\w+)` // %c

var SqlstateRegexp = `(\w{5})` // %e

var SupportedPrefixes = []string{
	LogPrefixAmazonRds, LogPrefixAzure, LogPrefixCustom1, LogPrefixCustom2,
	LogPrefixCustom3, LogPrefixCustom4, LogPrefixCustom5, LogPrefixCustom6,
	LogPrefixCustom7, LogPrefixCustom8, LogPrefixCustom9, LogPrefixCustom10,
	LogPrefixCustom11, LogPrefixCustom12, LogPrefixCustom13, LogPrefixCustom14,
	LogPrefixCustom15, LogPrefixCustom16,
	LogPrefixSimple, LogPrefixHeroku1, LogPrefixHeroku2, LogPrefixEmpty,
}

var SyslogSequenceAndSplitRegexp = `(\[[\d-]+\])?`

var TimeRegexp = `(\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}(?:\.\d+)? [\-+]?\w+)` // %t or %m (or %s)

var TransactionIdRegexp = `(\d+)` // %x

var UserRegexp = `(\S*)` // %u

var VirtualTxRegexp = `(\d+/\d+)?` // %v