b28daa6d60
This PR renames `String.endPos` to `String.rawEndPos`, as in a future release the name `String.endPos` will be taken by the function that is currently called `String.endValidPos`.
75 lines
2.7 KiB
Text
75 lines
2.7 KiB
Text
import Lake.CLI.Main
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/-!
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Usage: `lean --run script/Modulize.lean [--meta] file1.lean file2.lean ...`
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A simple script that inserts `module` and `public section` into un-modulized files and
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bumps their imports to `public`.
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When `--meta` is passed, `public meta section` and `public meta import` is used instead.
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-/
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open Lean Parser.Module
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def main (args : List String) : IO Unit := do
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let mut args := args
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let mut doMeta := false
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while !args.isEmpty && args[0]!.startsWith "-" do
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match args[0]! with
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| "--meta" => doMeta := true
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| arg => throw <| .userError s!"unknown flag '{arg}'"
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args := args.tail
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for path in args do
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-- Parse the input file
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let mut text ← IO.FS.readFile path
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let inputCtx := Parser.mkInputContext text path
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let (header, parserState, msgs) ← Parser.parseHeader inputCtx
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if !msgs.toList.isEmpty then -- skip this file if there are parse errors
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msgs.forM fun msg => msg.toString >>= IO.println
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throw <| .userError "parse errors in file"
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let `(header| $[module%$moduleTk?]? $imps:import*) := header
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| throw <| .userError s!"unexpected header syntax of {path}"
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if moduleTk?.isSome then
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continue
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-- initial whitespace if empty header
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let startPos := header.raw.getPos? |>.getD parserState.pos
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let dummyEnv ← mkEmptyEnvironment
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let (initCmd, parserState', _) :=
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Parser.parseCommand inputCtx { env := dummyEnv, options := {} } parserState msgs
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-- insert section if any trailing command
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if !initCmd.isOfKind ``Parser.Command.eoi then
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let insertPos? :=
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-- put below initial module docstring if any
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guard (initCmd.isOfKind ``Parser.Command.moduleDoc) *> initCmd.getTailPos? <|>
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-- else below header
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header.raw.getTailPos?
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let insertPos := insertPos?.getD startPos -- empty header
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let mut sec := if doMeta then
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"public meta section"
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else
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"@[expose] public section"
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if !imps.isEmpty then
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sec := "\n\n" ++ sec
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if insertPos?.isNone then
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sec := sec ++ "\n\n"
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text := text.extract 0 insertPos ++ sec ++ text.extract insertPos text.rawEndPos
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-- prepend each import with `public `
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for imp in imps.reverse do
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let insertPos := imp.raw.getPos?.get!
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let prfx := if doMeta then "public meta " else "public "
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text := text.extract 0 insertPos ++ prfx ++ text.extract insertPos text.rawEndPos
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-- insert `module` header
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let mut initText := text.extract 0 startPos
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if !initText.trim.isEmpty then
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-- If there is a header comment, preserve it and put `module` in the line after
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initText := initText.trimRight ++ "\n"
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text := initText ++ "module\n\n" ++ text.extract startPos text.rawEndPos
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IO.FS.writeFile path text
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