From aee2aa3461becc0ab525d2faaa8d74622937276e Mon Sep 17 00:00:00 2001
From: Ricard Illa <rilla@monotremata.xyz>
Date: Mon, 14 Mar 2022 15:20:17 +0100
Subject: [PATCH] feat: added lf

---
 home/lf/cleaner.nix    |   7 ++
 home/lf/default.nix    |  18 ++++
 home/lf/lf-wrapper.nix | 195 +++++++++++++++++++++++++++++++++++++++++
 home/lf/pv.nix         |  63 +++++++++++++
 home/nixos-common.nix  |   1 +
 5 files changed, 284 insertions(+)
 create mode 100644 home/lf/cleaner.nix
 create mode 100644 home/lf/default.nix
 create mode 100644 home/lf/lf-wrapper.nix
 create mode 100644 home/lf/pv.nix

diff --git a/home/lf/cleaner.nix b/home/lf/cleaner.nix
new file mode 100644
index 0000000..de9d83d
--- /dev/null
+++ b/home/lf/cleaner.nix
@@ -0,0 +1,7 @@
+{ config, pkgs, ... }:
+
+let printf = "${pkgs.coreutils-full}/bin/printf";
+in
+pkgs.writeShellScript "lf-cleaner.sh" ''
+  [ -n "$FIFO_UEBERZUG" ] && ${printf} '{"action": "remove", "identifier": "PREVIEW"}\n' > "$FIFO_UEBERZUG"
+''
diff --git a/home/lf/default.nix b/home/lf/default.nix
new file mode 100644
index 0000000..bc392a2
--- /dev/null
+++ b/home/lf/default.nix
@@ -0,0 +1,18 @@
+{ config, pkgs, ... }:
+
+let
+  pv = pkgs.callPackage ./pv.nix { inherit config pkgs; };
+  lf-wrapper = pkgs.callPackage ./lf-wrapper.nix { inherit config pkgs; };
+  cleaner = pkgs.callPackage ./cleaner.nix { inherit config pkgs; };
+
+in {
+  home.packages = [ lf-wrapper ];
+  programs.lf = {
+    enable = true;
+    previewer.source = pv;
+    settings.icons = true;
+    extraConfig = ''
+      set cleaner ${cleaner}
+    '';
+  };
+}
diff --git a/home/lf/lf-wrapper.nix b/home/lf/lf-wrapper.nix
new file mode 100644
index 0000000..b41c2de
--- /dev/null
+++ b/home/lf/lf-wrapper.nix
@@ -0,0 +1,195 @@
+{ config, pkgs, ... }:
+
+let
+  shell = "${pkgs.dash}/bin/dash";
+  lf = "${pkgs.lf}/bin/lf";
+  rm = "${pkgs.coreutils-full}/bin/rm";
+  mkdir = "${pkgs.coreutils-full}/bin/mkdir";
+  mkfifo = "${pkgs.coreutils-full}/bin/mkfifo";
+  ueberzug = "${pkgs.ueberzug}/bin/ueberzug";
+  lfcache = "${config.home.homeDirectory}/.cache/lf";
+in pkgs.writeScriptBin "lf-wrapper" ''
+  #!${shell}
+
+  set -e
+
+  export LF_ICONS="\
+  tw=:\
+  st=:\
+  ow=:\
+  dt=:\
+  di=:\
+  fi=:\
+  ln=:\
+  or=:\
+  ex=:\
+  *.c=:\
+  *.cc=:\
+  *.clj=:\
+  *.coffee=:\
+  *.cpp=:\
+  *.css=:\
+  *.d=:\
+  *.dart=:\
+  *.erl=:\
+  *.exs=:\
+  *.fs=:\
+  *.go=:\
+  *.h=:\
+  *.hh=:\
+  *.hpp=:\
+  *.hs=:\
+  *.html=:\
+  *.java=:\
+  *.jl=:\
+  *.js=:\
+  *.json=:\
+  *.lua=:\
+  *.md=:\
+  *.php=:\
+  *.pl=:\
+  *.pro=:\
+  *.py=:\
+  *.rb=:\
+  *.rs=:\
+  *.scala=:\
+  *.ts=:\
+  *.vim=:\
+  *.cmd=:\
+  *.ps1=:\
+  *.sh=:\
+  *.bash=:\
+  *.zsh=:\
+  *.fish=:\
+  *.tar=:\
+  *.tgz=:\
+  *.arc=:\
+  *.arj=:\
+  *.taz=:\
+  *.lha=:\
+  *.lz4=:\
+  *.lzh=:\
+  *.lzma=:\
+  *.tlz=:\
+  *.txz=:\
+  *.tzo=:\
+  *.t7z=:\
+  *.zip=:\
+  *.z=:\
+  *.dz=:\
+  *.gz=:\
+  *.lrz=:\
+  *.lz=:\
+  *.lzo=:\
+  *.xz=:\
+  *.zst=:\
+  *.tzst=:\
+  *.bz2=:\
+  *.bz=:\
+  *.tbz=:\
+  *.tbz2=:\
+  *.tz=:\
+  *.deb=:\
+  *.rpm=:\
+  *.jar=:\
+  *.war=:\
+  *.ear=:\
+  *.sar=:\
+  *.rar=:\
+  *.alz=:\
+  *.ace=:\
+  *.zoo=:\
+  *.cpio=:\
+  *.7z=:\
+  *.rz=:\
+  *.cab=:\
+  *.wim=:\
+  *.swm=:\
+  *.dwm=:\
+  *.esd=:\
+  *.jpg=:\
+  *.jpeg=:\
+  *.mjpg=:\
+  *.mjpeg=:\
+  *.gif=:\
+  *.bmp=:\
+  *.pbm=:\
+  *.pgm=:\
+  *.ppm=:\
+  *.tga=:\
+  *.xbm=:\
+  *.xpm=:\
+  *.tif=:\
+  *.tiff=:\
+  *.png=:\
+  *.svg=:\
+  *.svgz=:\
+  *.mng=:\
+  *.pcx=:\
+  *.mov=:\
+  *.mpg=:\
+  *.mpeg=:\
+  *.m2v=:\
+  *.mkv=:\
+  *.webm=:\
+  *.ogm=:\
+  *.mp4=:\
+  *.m4v=:\
+  *.mp4v=:\
+  *.vob=:\
+  *.qt=:\
+  *.nuv=:\
+  *.wmv=:\
+  *.asf=:\
+  *.rm=:\
+  *.rmvb=:\
+  *.flc=:\
+  *.avi=:\
+  *.fli=:\
+  *.flv=:\
+  *.gl=:\
+  *.dl=:\
+  *.xcf=:\
+  *.xwd=:\
+  *.yuv=:\
+  *.cgm=:\
+  *.emf=:\
+  *.ogv=:\
+  *.ogx=:\
+  *.aac=:\
+  *.au=:\
+  *.flac=:\
+  *.m4a=:\
+  *.mid=:\
+  *.midi=:\
+  *.mka=:\
+  *.mp3=:\
+  *.mpc=:\
+  *.ogg=:\
+  *.ra=:\
+  *.wav=:\
+  *.oga=:\
+  *.opus=:\
+  *.spx=:\
+  *.xspf=:\
+  *.pdf=:\
+  *.nix=:\
+  "
+
+  cleanup () {
+      exec 3>&-
+      rm "$FIFO_UEBERZUG"
+  }
+
+  if [ -n "$SSH_CLIENT" ] || [ -n "$SSH_TTY" ]; then
+      ${lf} "$@"
+  else
+      [ ! -d "${lfcache}" ] && ${mkdir} -p "${lfcache}"
+      export FIFO_UEBERZUG="${lfcache}/ueberzug-''$''$"
+      ${mkfifo} "$FIFO_UEBERZUG"
+      ${ueberzug} layer -s <"$FIFO_UEBERZUG" -p json &
+      exec 3>"$FIFO_UEBERZUG"
+      trap cleanup HUP INT QUIT TERM PWR EXIT
+      ${lf} "$@"
+  fi
+''
diff --git a/home/lf/pv.nix b/home/lf/pv.nix
new file mode 100644
index 0000000..e521272
--- /dev/null
+++ b/home/lf/pv.nix
@@ -0,0 +1,63 @@
+{ config, pkgs, ... }:
+
+let
+  file = "${pkgs.file}/bin/file";
+  lynx = "${pkgs.lynx}/bin/lynx";
+  man = "${pkgs.man}/bin/man";
+  col = "${pkgs.util-linux}/bin/col";
+  bat = "${pkgs.bat}/bin/bat";
+  atool = "${pkgs.atool}/bin/atool";
+  odt2txt = "${pkgs.odt2txt}/bin/odt2txt";
+  gpg = "${pkgs.gnupg}/bin/gpg";
+  mediainfo = "${pkgs.mediainfo}/bin/mediainfo";
+  printf = "${pkgs.coreutils-full}/bin/printf";
+  lfcache = "${config.home.homeDirectory}/.cache/lf";
+  stat = "${pkgs.coreutils-full}/bin/stat";
+  readlink = "${pkgs.coreutils-full}/bin/readlink";
+  sha256sum = "${pkgs.coreutils-full}/bin/sha256sum";
+  awk = "${pkgs.gawk}/bin/awk";
+  ffmpegthumbnailer = "${pkgs.ffmpegthumbnailer}/bin/ffmpegthumbnailer";
+  pdftoppm = "${pkgs.poppler_utils}/bin/pdftoppm";
+in pkgs.writeShellScript "pv.sh" ''
+
+  image() {
+      if [ -n "$DISPLAY" ] && [ -z "$WAYLAND_DISPLAY" ] && [ -n "$FIFO_UEBERZUG" ]; then
+          ${printf} '{"action": "add", "identifier": "PREVIEW", "x": "%s", "y": "%s", "width": "%s", "height": "%s", "scaler": "contain", "path": "%s"}\n' "$4" "$5" "$(($2-1))" "$(($3-1))" "$1" > "$FIFO_UEBERZUG"
+      else
+          ${mediainfo} "$1"
+      fi
+  }
+
+  get_cache_file () {
+      abs_path=$(${readlink} -f "$1")
+      postfix=$(${stat} --printf '%n\0%i\0%F\0%s\0%W\0%Y' -- "$abs_path" | ${sha256sum} | ${awk} '{print $1}')
+      echo "${lfcache}/thumb.$postfix"
+  }
+
+  video () {
+      cache=$(get_cache_file "$1")
+      [ ! -f "$cache" ] && ${ffmpegthumbnailer} -i "$1" -o "$cache" -s 0
+      image "$cache" "$2" "$3" "$4" "$5"
+  }
+
+  pdf () {
+      cache=$(get_cache_file "$1")
+      [ ! -f "$cache.jpg" ] && ${pdftoppm} -jpeg -f 1 -singlefile "$1" "$cache"
+      image "$cache.jpg" "$2" "$3" "$4" "$5"
+  }
+
+  case "$(${file} --dereference --brief --mime-type -- "$1")" in
+      image/*) image "$1" "$2" "$3" "$4" "$5" ;;
+      video/*) video "$1" "$2" "$3" "$4" "$5" ;;
+      */pdf) pdf "$1" "$2" "$3" "$4" "$5" ;;
+      text/html) ${lynx} -width="$4" -display_charset=utf-8 -dump "$1"  ;;
+      text/troff) ${man} ./ "$1" | ${col} -b ;;
+      text/* | */xml) ${bat} --terminal-width "$4" -f "$1" ;;
+      application/zip) ${atool} --list -- "$1" ;;
+      *opendocument*) ${odt2txt} "$1" ;;
+      audio/* | application/octet-stream) ${mediainfo} "$1" || exit 1 ;;
+      application/pgp-encrypted) ${gpg} -d -- "$1" ;;
+  esac
+
+  exit 1
+''
diff --git a/home/nixos-common.nix b/home/nixos-common.nix
index 5cac7d0..0863dcf 100644
--- a/home/nixos-common.nix
+++ b/home/nixos-common.nix
@@ -22,6 +22,7 @@
     ./gotify
     ./gpg
     ./idasen
+    ./lf
     ./mail
     ./maker
     ./minidisc