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devexamples

Structured Logging With Timestamps

Emit log lines with a UTC timestamp, level, and message from one helper, so shell output stays consistent and easy to parse.

BashResilience

Code

snippet
#!/usr/bin/env bash
set -euo pipefail

LOG_LEVEL="${LOG_LEVEL:-info}"

declare -A LEVELS=([debug]=0 [info]=1 [warn]=2 [error]=3)

log() {
  local level="${1:?level required}"
  shift
  local threshold="${LEVELS[${LOG_LEVEL}]:-1}"
  local current="${LEVELS[${level}]:-1}"
  if (( current < threshold )); then
    return 0
  fi
  printf '{"timestamp":"%s","level":"%s","message":"%s"}\n' \
    "$(date -u +%Y-%m-%dT%H:%M:%SZ)" "${level}" "$*" >&2
}

log info "job started"
log debug "this line is suppressed at info level"
log error "dependency unavailable"

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