83 lines
3.3 KiB
Text
83 lines
3.3 KiB
Text
/-
|
|
Copyright (c) 2019 Microsoft Corporation. All rights reserved.
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
|
Authors: Leonardo de Moura, Sebastian Ullrich
|
|
|
|
Management of the Lean search path (`LEAN_PATH`), which is a list of
|
|
paths containing package roots: an import `A.B.C` resolves to
|
|
`path/A/B/C.olean` for the first entry `path` in `LEAN_PATH`
|
|
with a directory `A/`. `import A` resolves to `path/A.olean`.
|
|
-/
|
|
import Lean.Data.Name
|
|
|
|
namespace Lean
|
|
open System.FilePath (pathSeparator extSeparator)
|
|
private def pathSep : String := toString pathSeparator
|
|
|
|
def realPathNormalized (fname : String) : IO String := do
|
|
fname ← IO.realPath fname
|
|
pure (System.FilePath.normalizePath fname)
|
|
|
|
abbrev SearchPath := List String
|
|
|
|
builtin_initialize searchPathRef : IO.Ref SearchPath ← IO.mkRef {}
|
|
|
|
def parseSearchPath (path : String) (sp : SearchPath := ∅) : IO SearchPath :=
|
|
pure $ System.FilePath.splitSearchPath path ++ sp
|
|
|
|
@[extern c inline "LEAN_IS_STAGE0"]
|
|
constant isStage0 (u : Unit) : Bool
|
|
|
|
def getBuiltinSearchPath : IO SearchPath := do
|
|
let appDir ← IO.appDir
|
|
-- use stage1 stdlib with stage0 executable (which should never be distributed outside of the build directory)
|
|
pure [appDir ++ pathSep ++ ".." ++ (if isStage0 () then pathSep ++ ".." ++ pathSep ++ "stage1" else "") ++ pathSep ++ "lib" ++ pathSep ++ "lean"]
|
|
|
|
def addSearchPathFromEnv (sp : SearchPath) : IO SearchPath := do
|
|
let val ← IO.getEnv "LEAN_PATH"
|
|
match val with
|
|
| none => pure sp
|
|
| some val => parseSearchPath val sp
|
|
|
|
@[export lean_init_search_path]
|
|
def initSearchPath (path : Option String := none) : IO Unit :=
|
|
match path with
|
|
| some path => parseSearchPath path >>= searchPathRef.set
|
|
| none => do
|
|
let sp ← getBuiltinSearchPath
|
|
let sp ← addSearchPathFromEnv sp
|
|
searchPathRef.set sp
|
|
|
|
def modPathToFilePath : Name → String
|
|
| Name.str p h _ => modPathToFilePath p ++ pathSep ++ h
|
|
| Name.anonymous => ""
|
|
| Name.num p _ _ => panic! "ill-formed import"
|
|
|
|
def findOLean (mod : Name) : IO String := do
|
|
let sp ← searchPathRef.get
|
|
let pkg := mod.getRoot.toString
|
|
let some root ← sp.findM? (fun path => IO.isDir $ path ++ pathSep ++ pkg)
|
|
| throw $ IO.userError $ "unknown package '" ++ pkg ++ "'"
|
|
pure $ root ++ modPathToFilePath mod ++ ".olean"
|
|
|
|
/-- Infer module name of source file name. -/
|
|
@[export lean_module_name_of_file]
|
|
def moduleNameOfFileName (fname : String) (rootDir : Option String) : IO Name := do
|
|
let fname ← realPathNormalized fname
|
|
let rootDir ← match rootDir with
|
|
| some rootDir => pure rootDir
|
|
| none => IO.currentDir
|
|
let rootDir ← realPathNormalized rootDir
|
|
if !rootDir.isPrefixOf fname then
|
|
throw $ IO.userError s!"input file '{fname}' must be contained in root directory ({rootDir})"
|
|
let fnameSuffix := fname.drop rootDir.length
|
|
let fnameSuffix := if fnameSuffix.get 0 == pathSeparator then fnameSuffix.drop 1 else fnameSuffix
|
|
let some extPos ← pure (fnameSuffix.revPosOf '.')
|
|
| throw (IO.userError ("failed to convert file name '" ++ fname ++ "' to module name, extension is missing"))
|
|
let modNameStr := fnameSuffix.extract 0 extPos
|
|
let extStr := fnameSuffix.extract (extPos + 1) fnameSuffix.bsize
|
|
let parts := modNameStr.splitOn pathSep
|
|
let modName := parts.foldl mkNameStr Name.anonymous
|
|
pure modName
|
|
|
|
end Lean
|