#!/bin/sh

usage () {
	cat <<EOF>&2
Usage: ${0##*/} COMMAND [PACKAGES]

Wrapper around essential features of 'tlmgr' TeXlive manager.

List of commands:

  f:  Search files.
  i:  Install packages.
  l   List installed packages.
  q   Query info about package.
  r:  Remove packages.
  s:  Search packages.
  u:  Update tlmgr.
EOF
}

[ $# -eq 0 ] && usage && exit 1


if ! command -v tlmgr >/dev/null 2>&1; then
	echo 'tlmgr not found'
	exit 1
fi

command="$1"
shift 1

## It is important to set umask properly, otherwise users might not have
## authorization to use the packages.
case "$command" in
f)
	tlmgr search --global --file "$@"	;;
h)
	usage ;;
i)
	sudo sh -c 'umask 022 && tlmgr install $0 "$@"' "$@" ;;
l)
	## Note: We use <TAB> in the sed expressions.
	TEXLIVE_BASIC="$(mktemp)"
	tlmgr info collection-basic --list | sed -n '/^	/{s/	//g;p;}' | LC_ALL=C sort >"$TEXLIVE_BASIC"

	TEXLIVE_ALL="$(mktemp)"
	tlmgr info --only-installed | grep -v 'x86_64\|amd64' | cut -d' ' -f2 | cut -f1 -d':' | LC_ALL=C sort >"$TEXLIVE_ALL"

	LC_ALL=C comm -3 "$TEXLIVE_BASIC" "$TEXLIVE_ALL" | sed 's/	//g' | \
		grep -vi 'collection-basic\|scheme-minimal\|texlive-common\|texlive-docindex\|texlive-en'

	rm "$TEXLIVE_ALL" "$TEXLIVE_BASIC"
	;;
q)
	## First query locally, then online db if needed.
	buf=$(tlmgr info --list --only-installed "$@")
	installed=$(echo "$buf" | awk '$1 == "package:" {firstline=$0; getline; if($1!="category:") next; else print firstline } 1')
	echo "$installed"
	missing=$(echo "$buf" | awk '$1 == "package:" {pkg=$2; getline; if($1!="category:") print pkg}')
	[ -n "$missing" ] && tlmgr info --list "$missing"
	;;
r)
	sudo sh -c 'umask 022 && tlmgr remove $0 "$@"' "$@" ;;
s)
	tlmgr search --global "$@" ;;
u)
	sudo sh -c 'umask 022 && tlmgr update --self'	;;
*)
	echo "wrong command '$command'"
	usage
	exit 1 ;;
esac

exit $?