Effects.fetch_if: def of near-v-framework@0.4.0.0
Import: import near-v-framework@0.4.0.0/domain/architecture/system/effects.bend as Effects
Lines 85-95 of near-v-framework@0.4.0.0/domain/architecture/system/effects.bend: https://jend.leeeet.dev/read.txt?path=near-v-framework@0.4.0.0/domain/architecture/system/effects.bend&start_line=85&end_line=95

import Base
import bend-kit-files@0.1.0.0/files.bend as Fs
import near-v-framework@0.4.0.0/domain/architecture/system/effs/io.bend as X

# The package's hash, as Bend's local cache names it. A package not cached yet is fetched first by
# checking a file that imports it: the hub has it exactly when that succeeds.
def fetch_if(missing: Bool, +home: String, +n: String, +v: String, +e: String, +cached: String) -> IO(String):
  match missing:
    case False{}:
      IO.pure(String, cached)
    case True{}:
      do IO<String>:
        X.write("/tmp/v-probe.bend", "import Base\nimport " ++ n ++ "@" ++ v ++ "/" ++ Fs.path.file_name(e) ++ " as P\n")
        _ : Bool <- X.succeeds(home ++ "/.bend/bin/bend", ["/tmp/v-probe.bend", "--check-only"])
        X.read(home ++ "/.bend/lib/names/" ++ n ++ "@" ++ v)

Uses (12):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO.bind
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO.pure
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  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
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit
  https://jend.leeeet.dev/definition.txt?path=bend-kit-files@0.3.1.0/files.bend&name=path.file_name
  https://jend.leeeet.dev/definition.txt?path=near-v-framework@0.4.0.0/domain/architecture/system/effs/io.bend&name=read
  https://jend.leeeet.dev/definition.txt?path=near-v-framework@0.4.0.0/domain/architecture/system/effs/io.bend&name=succeeds
  https://jend.leeeet.dev/definition.txt?path=near-v-framework@0.4.0.0/domain/architecture/system/effs/io.bend&name=write