Function normalize 

pub fn normalize(app: AppConfig) -> Result<ResolvedApp, NormalizeError>

Validates one app config

Errors

• NormalizeError::MissingName: name is empty.
• NormalizeError::InvalidName: name contains a path separator or a colon, or is ./...
• NormalizeError::ReservedEnvVar: env sets SHEP_INSTANCE or SHEP_NAME, which shep injects itself (carries the app name and the variable).
• NormalizeError::IncrementVarRemoved: increment_var is set. It was removed in favour of {{instance}} templating (carries the app name and the variable the app named).
• NormalizeError::MissingScript: script is empty.
• NormalizeError::ZeroInstances: instances == 0.
• NormalizeError::InvalidCron: cron_restart is not valid in croner’s dialect (carries the pattern and the rejection reason).
• NormalizeError::InvalidTimezone: cron_timezone is not a name in the IANA time-zone database.
• NormalizeError::InvalidProbe: readiness_probe or liveness_probe has a target ProbeTarget::parse rejects (carries which probe and the rendered reason).
• NormalizeError::ZeroFailureThreshold: a probe’s failure_threshold is explicitly 0.
• NormalizeError::IntervalBelowMinimum: a probe’s interval is under the floor its own loop honours: a full second for liveness_probe, and only “greater than zero” for readiness_probe (carries which probe, the value and the floor).
• NormalizeError::ZeroMaxMemory: max_memory is 0.
• NormalizeError::ActionTimeoutTooLong: action_timeout is at or above the ceiling no RPC caller could ever be given room to wait past (carries the app name, the value and the ceiling).
• NormalizeError::InvalidKillSignal: kill_signal names a signal the daemon’s stop ladder cannot send (carries the app name and the value).
• NormalizeError::WatchWithoutCwd: watch is true with no cwd set.
• NormalizeError::ZeroWatchDelay: watch_delay is 0.
• NormalizeError::InvalidWatchGlob: a watch_options or ignore_watch pattern globset will not compile (carries the app name, which of the two lists, the pattern and the reason).
• NormalizeError::BadTemplate: an env value, an args entry, or an out_file/err_file path carries a {{...}} naming something crate::config::template does not define, or a {{ that is never closed by a }} (carries the app name, which field, and the rejection).
• NormalizeError::SharedLogPath: out_file or err_file renders to the SAME path for two different slots, with instances > 1 and merge_logs off, so every instance would write to one file without having asked to. Rendered, not searched: a path with no {{instance}} in it collides, and so does one carrying only {{name}}, or an escaped {{{{instance}}}}, which spells the token but renders as a literal.