Update lnav note with custom format
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2 changed files with 48 additions and 2 deletions
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@ -4,3 +4,49 @@ tags: debugging logs terminal
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# LNav
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# LNav
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[lnav](https://lnav.org) is a #terminal logfile viewer based on #curses.
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[lnav](https://lnav.org) is a #terminal logfile viewer based on #curses.
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## Custom Formats:
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lnav supports adding [custom format descriptions](https://docs.lnav.org/en/latest/formats.html) to parse Log formats that lack built-in support.
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```json
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{
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"$schema": "https://lnav.org/schemas/format-v1.schema.json",
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"example": {
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"title": "Example Format",
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"description": "A generic example for how to make a custom lnav Format",
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"url": "https://example.org/",
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"regex": {
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"line": {
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"pattern": "^(?<timestamp>[\\d-]{10} [\\d:]{8}) [-+]\\d{4} \\[(?<level>[A-Z]+)\\] (?<src_file>[^:]+):(?<src_line>\\d+) -- (?<body>.*)$"
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}
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},
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"timestamp-format": "%Y-%m-%d %H:%M:%S %z",
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"level-field": "level",
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"level": {
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"fatal": "FATAL",
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"error": "ERROR",
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"warning": "WARNING",
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"info": "INFO",
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"debug": "DEBUG"
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},
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"value": {
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"src_line": {
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"kind": "integer",
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"foreign-key": true
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},
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"src_file": {
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"kind": "string",
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"identifier": true,
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"foreign-key": true
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}
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},
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"sample": [
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{ "line": "2022-05-20 11:10:54 +0200 [FATAL] test.lua:8 -- Fatal" },
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{ "line": "2022-05-20 11:10:54 +0200 [ERROR] test.lua:9 -- Error" },
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{ "line": "2022-05-20 11:10:54 +0200 [WARN] test.lua:10 -- Warn" },
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{ "line": "2022-05-20 11:10:54 +0200 [INFO] test.lua:11 -- Info" },
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{ "line": "2022-05-20 11:10:54 +0200 [DEBUG] test.lua:12 -- Debug" }
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]
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}
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}
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```
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