Plan.nar.why: def of ezx@1.11.0.0
Import: import ezx@1.11.0.0/src/fetch/plan.bend as Plan
Lines 416-437 of ezx@1.11.0.0/src/fetch/plan.bend: https://jend.leeeet.dev/read.txt?path=ezx@1.11.0.0/src/fetch/plan.bend&start_line=416&end_line=437

import Base

# why a checkout may not be laid for the narHash it weighed to, "" when it
# may: the lock records a narHash and the checkout weighed to it
def nar.why(
  none: Bool,
  same: Bool,
  +hash: String,
  +want: String,
  +got: String,
  +url: String,
  +rev: String
) -> String:
  match none:
    case True{}:
      "ez: " ++ hash ++ ": the lock records no narHash for " ++ url ++ " at " ++ rev ++
        ", so its checkout cannot be checked; run `ez lock --upgrade` to pin it"
    case False{}:
      match same:
        case True{}:
          ""
        case False{}:
          "ez: " ++ hash ++ ": " ++ url ++ " at " ++ rev ++ " has narHash " ++ got ++
            ", and the lock records " ++ want

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.append