cheat

#!/bin/sh

ESC_R="\x1b[0m"
ESC_CC="\x1b[38;5;246m\x1b[3m"
ESC_TL="\x1b[48;5;8m"

PGER="less -RF"

CHEAT_PAGES_DIR="${XDG_DATA_HOME:-$HOME/.local/share}/cheat"
TMPDIR="$CHEAT_PAGES_DIR/tmpdir"
PAGEFILE="$CHEAT_PAGES_DIR/page"

update () {
  set -e
	mkdir -p "$TMPDIR"
	[ -f  "$PAGEFILE" ] && COUNT="$(grep -c '^\[T\]' "$PAGEFILE")"
	
	#Clone Repos And Extract Pages
	#tldr
	echo "Cloning: TLDR"
	git clone -q https://www.github.com/tldr-pages/tldr "$TMPDIR/tldr"
	echo "TLDR: Extracing Pages"
	mkdir -p "$TMPDIR/tldr-cv"
	mv "$TMPDIR"/tldr/pages/common/* "$TMPDIR/tldr-cv"
	mv "$TMPDIR"/tldr/pages/linux/* "$TMPDIR/tldr-cv"
	echo "TLDR: Converting Pages"
	echo > "$PAGEFILE"
	for tldr_page in $(find "$TMPDIR/tldr-cv" ! -name 'tldr-cv' -printf '%f\n' | sed 's/.md$//'); do
		printf "[T]%s:\n" "tldr/$tldr_page" >> "$PAGEFILE"
		sed 's/{{|}}//g; s/^[->]/#/g; s/^`\|`$//g;' "$TMPDIR/tldr-cv/$tldr_page.md" >> "$PAGEFILE"
	done

	#cheat
	echo "Cloning: cheat"
	git clone -q https://github.com/cheat/cheatsheets "$TMPDIR/cheat"
	echo "cheat: Extracting Pages"
	rm -rf "$TMPDIR"/cheat/.git* "$TMPDIR/cheat/vim-plugins"
  find "$TMPDIR/cheat" -maxdepth 1 -type f -exec sh -c \
    'printf "[T]%s:\n" "cheat/$(basename $1)" >> '"$PAGEFILE"' && cat "$1" >> '"$PAGEFILE" sh {} \;

	#cheat_sheets
	echo "Cloning: cheat.sheets"
	git clone -q https://github.com/chubin/cheat.sheets "$TMPDIR/cheat_pages"
	echo "cheat.sheets: Extracting Pages"
  find "$TMPDIR/cheat_pages/sheets/" -maxdepth 1 -type f -exec sh -c \
    'printf "[T]%s:\n" "cheat.sheets/$(basename $1)" >> '"$PAGEFILE"' && cat "$1" >> '"$PAGEFILE" sh {} \;

  #learnxinyminutes
  echo "Cloning: learnxinyminutes"
  git clone -q "https://github.com/adambard/learnxinyminutes-docs.git" "$TMPDIR/learn"
	echo "learnxinyminutes: Extracting Pages"
  find "$TMPDIR/learn/" -maxdepth 1 -name "*.html.markdown" -type f -exec sh -c \
    'printf "[T]%s:\n" "learnxinyminutes/learn-$(basename $1 | sed "s/.html.markdown//")" >> '"$PAGEFILE"' && cat "$1" >> '"$PAGEFILE" sh {} \;

	#Cleanup, Nuke `tmpdir/`
	echo "Cleaning Up"
	rm -rf "$TMPDIR"
	echo "Update Complete"
	printf "%s -> %s\n" "$COUNT" "$(grep -c '^\[T\]' "$PAGEFILE")"
}

while getopts tucp:d: flag; do
	case "$flag" in
		t) ESC_R=""; ESC_CC=""; ESC_TL="";;
		u) update; exit ;;
		c) PGER="cat" ;;
    p) PAGEFILE="$OPTARG" ;;
    d) GETFROM="$OPTARG" ;;
		*) echo "cheat, a tool used for printing useful info about commands\n
Usage: cheat [-htuc] [-d SOURCE] [-p PAGE] COMMAND"; exit ;;
	esac
done
shift $((OPTIND-1))

: ${1:?Needs Args}

awk "
  /^\[T\]/ { j = /$GETFROM\\/$1:$/ }\
	j && (\$1 ~ /^#/ || /^\[T\]/) {\
		gsub(/^\[T\]/, \"$ESC_TL\")
		gsub(/^#/, \"$ESC_CC#\")\
		gsub(/$/, \"$ESC_R\")\
	} j" "$PAGEFILE" | tr -d '\r' | $PGER

[ "$(stat -c '%Y' "$PAGEFILE" )" -lt "$(date -d '1 week ago' '+%s')" ] && \
  printf "It has been over 1 week since you updated your pages, \nrun '%s -u' to update them\n" "$(basename "$0")"