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agda-unused-imports
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Amélia Liao 2 years ago
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      LICENSE
  3. +1
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      README.md
  4. +2
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      Setup.hs
  5. +25
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      agda-unused-imports.cabal
  6. +67
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      src/Main.hs
  7. +67
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      stack.yaml
  8. +13
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      stack.yaml.lock

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.gitignore View File

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/.stack-work
/html
/*.agda
/*.agdai

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LICENSE View File

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Copyright Abigail Magalhães (c) 2021
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
* Neither the name of Abigail Magalhães nor the names of other
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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README.md View File

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# agda-unused-imports

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Setup.hs View File

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import Distribution.Simple
main = defaultMain

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agda-unused-imports.cabal View File

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name: agda-unused-imports
version: 0.1.0.0
-- synopsis:
-- description:
homepage: https://github.com/plt-hokusai/agda-unused-imports#readme
license: BSD3
license-file: LICENSE
author: Abigail Magalhães
maintainer: [email protected]
copyright: 2021 Abigail Magalhães
category: Web
build-type: Simple
cabal-version: >=1.10
extra-source-files: README.md
executable agda-unused-imports
hs-source-dirs: src
main-is: Main.hs
default-language: Haskell2010
build-depends: base >= 4.7 && < 5
, text
, tagsoup
, hashable
, filepath
, unordered-containers

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src/Main.hs View File

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#!/usr/bin/env stack
{- stack --resolver lts-18.14 script
--package text
--package unordered-containers
--package tagsoup
--package filepath
--package hashable
-}
{-# LANGUAGE OverloadedStrings #-}
module Main where
import qualified Data.Text.Lazy.IO as Text
import qualified Data.HashSet as HashSet
import qualified Data.Text.Lazy as Text
import Data.HashSet (HashSet)
import Data.Text.Lazy (Text)
import Data.Hashable
import System.Environment
import Text.HTML.TagSoup
import Data.Function
import Data.Int
import Data.Foldable
import System.FilePath
import Control.Monad
main :: IO ()
main = do
args <- getArgs
for_ args $ \mod -> do
contents <- Text.readFile mod
let unused = findUnusedImports mempty (parseTags contents)
unless (null unused) $ do
putStrLn $ "Potentially unused imports for: \x1b[1m" <> dropExtension (takeFileName mod) <> "\x1b[0m"
Text.putStrLn $ " * " <> Text.intercalate ", " (toList unused)
findUnusedImports :: HashSet Text -> [Tag Text] -> HashSet Text
findUnusedImports unused (TagOpen "pre" attrs:ts)
| Just "Agda" <- lookup "class" attrs
= goAgda 0 unused ts
findUnusedImports unused (_:ts) = findUnusedImports unused ts
findUnusedImports unused [] = unused
goAgda :: Int64 -> HashSet Text -> [Tag Text] -> HashSet Text
goAgda line unused (TagOpen "a" attrs:TagText text:TagClose "a":ts)
| Just "Module" <- lookup "class" attrs
, Just href <- lookup "href" attrs
, ".html" `Text.isSuffixOf` href
= let
imp = Text.take (Text.length href - 5) href
in goAgda line (HashSet.insert imp unused) ts
| Just href <- lookup "href" attrs
, let (mod, ident) = Text.break (== '#') href
, not (Text.null mod), not (Text.null (Text.drop 1 ident))
= let
imp = Text.take (Text.length mod - 5) mod
in goAgda line (HashSet.delete imp unused) ts
goAgda line unused (TagClose "pre":ts) = findUnusedImports unused ts
goAgda line unused (TagText text:ts)
| newlines <- Text.filter (== '\n') text = goAgda (line + Text.length newlines) unused ts
goAgda line unused (t:ts) = goAgda line unused ts
goAgda line unused [] = error "Unclosed <pre class=Agda> tag"

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stack.yaml View File

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# This file was automatically generated by 'stack init'
#
# Some commonly used options have been documented as comments in this file.
# For advanced use and comprehensive documentation of the format, please see:
# https://docs.haskellstack.org/en/stable/yaml_configuration/
# Resolver to choose a 'specific' stackage snapshot or a compiler version.
# A snapshot resolver dictates the compiler version and the set of packages
# to be used for project dependencies. For example:
#
# resolver: lts-3.5
# resolver: nightly-2015-09-21
# resolver: ghc-7.10.2
#
# The location of a snapshot can be provided as a file or url. Stack assumes
# a snapshot provided as a file might change, whereas a url resource does not.
#
# resolver: ./custom-snapshot.yaml
# resolver: https://example.com/snapshots/2018-01-01.yaml
resolver:
url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/14.yaml
# User packages to be built.
# Various formats can be used as shown in the example below.
#
# packages:
# - some-directory
# - https://example.com/foo/bar/baz-0.0.2.tar.gz
# subdirs:
# - auto-update
# - wai
packages:
- .
# Dependency packages to be pulled from upstream that are not in the resolver.
# These entries can reference officially published versions as well as
# forks / in-progress versions pinned to a git hash. For example:
#
# extra-deps:
# - acme-missiles-0.3
# - git: https://github.com/commercialhaskell/stack.git
# commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
#
# extra-deps: []
# Override default flag values for local packages and extra-deps
# flags: {}
# Extra package databases containing global packages
# extra-package-dbs: []
# Control whether we use the GHC we find on the path
# system-ghc: true
#
# Require a specific version of stack, using version ranges
# require-stack-version: -any # Default
# require-stack-version: ">=2.7"
#
# Override the architecture used by stack, especially useful on Windows
# arch: i386
# arch: x86_64
#
# Extra directories used by stack for building
# extra-include-dirs: [/path/to/dir]
# extra-lib-dirs: [/path/to/dir]
#
# Allow a newer minor version of GHC than the snapshot specifies
# compiler-check: newer-minor

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# This file was autogenerated by Stack.
# You should not edit this file by hand.
# For more information, please see the documentation at:
# https://docs.haskellstack.org/en/stable/lock_files
packages: []
snapshots:
- completed:
size: 586069
url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/14.yaml
sha256: 87842ecbaa8ca9cee59a7e6be52369dbed82ed075cb4e0d152614a627e8fd488
original:
url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/14.yaml

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