MobDev.SecurityScan.Diff (mob_dev v0.5.9)

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Computes the delta between the previous scan state and the current report:

  • new — findings present now that were absent last run
  • resolved — findings present last run that are absent now
  • still_present — findings in both, with their first_seen_at preserved from the prior state for patch-lag display

The dedup key is Finding.dedupe_key/1 (id, package, version). Two findings reported by different sources for the same advisory on the same package@version are considered the same finding — resolution is based on the underlying vulnerability, not the scanner that surfaced it.

Summary

Types

t()

Functions

compute(prev_state, report, now)

Compute the diff between a previous state map (typically loaded from the state file) and the current report.

string_key(f)

String form of Finding.dedupe_key/1 — matches StateFile entry keys.

Types

t()

@type t() :: %MobDev.SecurityScan.Diff{
  first_seen: %{required(MobDev.SecurityScan.StateFile.key()) => DateTime.t()},
  new: [MobDev.SecurityScan.Finding.t()],
  resolved: [MobDev.SecurityScan.StateFile.entry()],
  still_present: [MobDev.SecurityScan.Finding.t()]
}

Functions

compute(prev_state, report, now)

@spec compute(
  MobDev.SecurityScan.StateFile.state(),
  MobDev.SecurityScan.Report.t(),
  DateTime.t()
) ::
  t()

Compute the diff between a previous state map (typically loaded from the state file) and the current report.

Both sides are keyed by the string form of Finding.dedupe_key/1 ("id|package|version") so we can compare across the JSON state file boundary.

now is injectable so tests can pin timestamps.

string_key(f)

@spec string_key(MobDev.SecurityScan.Finding.t()) :: String.t()

String form of Finding.dedupe_key/1 — matches StateFile entry keys.