Revert "Merge pull request 'Rewrite easyscan in haskell' (#31) from easyscan2 into trunk"

This reverts commit b3fb8aff73, reversing
changes made to a7aa536cf6.

nix/packages/by-name/easyscan/.gitignore

@@ -1 +0,0 @@
-dist-newstyle/

nix/packages/by-name/easyscan/easyscan.sh

@@ -0,0 +1,61 @@
+# This is here because scanimage's batch mode is broken for my scanner
+
+OUTPUT_FILE="${1:-./scan_"$(date)".pdf}"
+
+if [ -e "$OUTPUT_FILE" ]; then
+	echo "$OUTPUT_FILE" already exists, you are probably making a mistake!
+	exit 1
+fi
+
+tempdir="$(mktemp -d)"
+filenames=()
+counter=1
+
+function clean() {
+	# Make sure I don't remove things other than pdf
+	rm "$tempdir/"*.pdf
+	rm -d "$tempdir"
+}
+trap clean EXIT
+
+while :; do
+	ok="true"
+	echo "Scanning page $counter"
+
+	CUR_FNAME="$tempdir/easyscan_$counter.pdf"
+
+	# If no size is set, the output will be wonky-sized
+	# 210,297 is the size of A4
+	scanimage -x 210 -y 297 --resolution 300 -o "$CUR_FNAME" >/dev/null 2>&1 ||
+		{
+			echo "Failed to scan page..."
+			ok="false"
+		}
+
+	if $ok; then
+		counter=$((counter += 1))
+		filenames+=("$CUR_FNAME")
+	fi
+
+	IFS= read -r -p "Continue scanning? [Y/n] " cont
+	case "$cont" in
+	[nN])
+		echo "Exiting..."
+		break
+		;;
+	[yY] | *) ;;
+	esac
+done
+
+# Multiple files are scanned, join them
+#
+# Note: do NOT use the * glob, because bash orders lexicographically and not
+# numerically, the merged ordering will be wrong.
+merged_filename="$tempdir/easyscan_final.pdf"
+pdfunite "${filenames[@]}" "$merged_filename"
+
+# Copy scan to current directory
+mkdir -p "$(dirname "$OUTPUT_FILE")"
+cp "$merged_filename" "$OUTPUT_FILE"
+
+clean

nix/packages/by-name/easyscan/package.nix

@@ -1,28 +1,19 @@
 {
-  lib,
-  haskellPackages,
-  haskell,
-  symlinkJoin,
-  makeWrapper,
-  sane-backends, # scanimage
-  poppler-utils, # mergepdf
+  writeShellApplication,
+  sane-backends,
+  poppler-utils,
+  fzf,
+  ghostscript,
 }:
-let
-  inherit (haskell.lib.compose) justStaticExecutables;
-
-  drv = haskellPackages.callCabal2nix "easyscan" ./src { };
-in
-symlinkJoin {
+writeShellApplication {
   name = "easyscan";
-  paths = [ (justStaticExecutables drv) ];
-  buildInputs = [ makeWrapper ];
-  postBuild = ''
-    wrapProgram $out/bin/easyscan \
-      --prefix PATH : "${
-        lib.makeBinPath [
-          sane-backends
-          poppler-utils
-        ]
-      }"
-  '';
+
+  runtimeInputs = [
+    sane-backends
+    poppler-utils
+    fzf
+    ghostscript
+  ];
+
+  text = builtins.readFile ./easyscan.sh;
 }

nix/packages/by-name/easyscan/src/Main.hs

@@ -1,99 +0,0 @@
-#!/usr/bin/env runhaskell
-{-# LANGUAGE LambdaCase #-}
-
--- This is here because scanimage's batch mode is broken for my scanner
-
-import Control.Monad
-import Data.Char
-import System.Directory
-import System.Environment
-import System.Exit
-import System.FilePath
-import System.Posix.Temp
-import System.IO
-import System.Process
-
-data ScanState = ScanState (Maybe ExitCode) Word
-
-defaultScanimageArgs :: [String]
-defaultScanimageArgs =
-  -- If no size is set, the output will be wonky-sized
-  -- 210,297 is the size of A4
-  [ "-x", "210"
-  , "-y", "297"
-  , "--resolution", "300"
-  ]
-
-main :: IO ()
-main = do
-  let confirmP = ( \c -> c == "y" || null c ) . map toLower
-
-  getArgs >>= \case
-    ( targetFile : [] ) -> do
-      workingDir <- mkdtemp "/tmp/"
-
-      (ScanState mExitCode nextIndex) <- loop
-        ( do; putStr "Continue? [Y/n] "; confirmP <$> getLine
-        )
-        ( readPage workingDir
-        )
-        ( ScanState Nothing 1
-        )
-      when (mExitCode /= Just ExitSuccess) $ exitWith (ExitFailure 1)
-
-      let mergedFilename = workingDir </> "easyscan_joined.pdf"
-          allFiles = map (\n -> workingDir </> show n <.> "pdf" ) [1 .. nextIndex - 1 ]
-
-      if null allFiles
-      then do
-        putStrLn "No file was scanned, exiting."
-        exitWith (ExitFailure 1)
-      else do
-        () <$ readProcessWithExitCodeTraced "pdfunite" (allFiles ++ [ mergedFilename ]) ""
-        copyFile mergedFilename targetFile
-        removeDirectoryRecursive workingDir
-
-    -- TODO: help page
-    _ -> exitWith (ExitFailure 1)
-  where
-    loop :: IO Bool -> (s -> IO s) -> s -> IO s
-    loop cond action state0 = do
-            x <- action state0
-            c <- cond
-            if c then loop cond action x
-            else      pure x
-
--- |
--- Invariant: the counter is only incremented upon success
-readPage :: FilePath -> ScanState -> IO ScanState
-readPage dir (ScanState _ n) = do
-  (c, _out, err) <- readProcessWithExitCodeTraced
-    "scanimage"
-    ( defaultScanimageArgs <> [ "-o", dir </> show n <.> "pdf" ]
-    )
-    ""
-  case c of
-    ExitSuccess -> pure (ScanState (Just c) (n+1))
-    ExitFailure _ -> do
-      putStr (redForeground err)
-      pure (ScanState (Just c) n)
-
---
--- Helpers
---
-
-quote :: String -> String
-quote x = "\"" <> x <> "\""
-
--- https://stackoverflow.com/a/70162369
-blueForeground :: String -> String
-blueForeground x = "\ESC[34m" <> x <> "\ESC[0m"
-
-redForeground :: String -> String
-redForeground x = "\ESC[31m" <> x <> "\ESC[0m"
-
-readProcessWithExitCodeTraced :: String -> [String] -> String -> IO (ExitCode, String, String)
-readProcessWithExitCodeTraced cmdName args inp = do
-  hPutStrLn stderr
-    $ "Executing: " <> (quote . blueForeground) (showCommandForUser cmdName args)
-  readProcessWithExitCode cmdName args inp

nix/packages/by-name/easyscan/src/easyscan.cabal

@@ -1,24 +0,0 @@
-cabal-version:      3.0
-name:               easyscan
-version:            0.1.0.0
-description:        scanimage helper
-author:             Léana 江
-maintainer:         leana.jiang+git@icloud.com
-build-type:         Simple
-
-common common
-  ghc-options:
-    -Wall -Wcompat -Widentities -Wincomplete-record-updates
-    -Wincomplete-patterns -Wincomplete-uni-patterns
-    -Wredundant-constraints -Werror=missing-fields
-  build-depends: base
-  default-language: Haskell2010
-
-executable easyscan
-  import: common
-  main-is: ./Main.hs
-  build-depends:
-    , filepath
-    , directory
-    , process
-    , unix