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authorP. J. McDermott <pj@pehjota.net>2015-10-30 22:24:32 (EDT)
committer P. J. McDermott <pj@pehjota.net>2015-10-30 22:24:32 (EDT)
commitbf46029a27dcac7f2162b939f77622ee1d22d79e (patch)
treec00855e2703459dbfd5375fb4f521c56d1f3b279 /tools
parent5b94afc72e3d4a1dba6c2ac111bef2caa7a4f1a6 (diff)
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tools/shmin.sh: Remove
It screws up handling backslash-escaped characters in src/ui/tui.sh; fails to parse src/dist/libiquity.sh (due to an EOF while parsing a double-quoted string); and doesn't know how to handle parameter expansions, command substitutions, here-documents, etc. It needs to be rewritten into a proper parser. But, if firman gets compressed (e.g. as part of an initramfs) anyway, minifying it first only saves less than 2 KiB.
Diffstat (limited to 'tools')
-rwxr-xr-xtools/shmin.sh292
1 files changed, 0 insertions, 292 deletions
diff --git a/tools/shmin.sh b/tools/shmin.sh
deleted file mode 100755
index d4386c6..0000000
--- a/tools/shmin.sh
+++ /dev/null
@@ -1,292 +0,0 @@
-#!/bin/sh
-#
-# Shell command language minifier
-#
-# Copyright (C) 2015 Patrick "P. J." McDermott
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-set -u
-
-VERSION='0.1.0'
-HT=' '
-LF='
-'
-
-c=
-output=''
-
-die()
-{
- local fmt="${1}"
- shift 1
-
- printf "shmin: ${fmt}\n" "${@}" >&2
- exit 2
-}
-
-fgetc()
-{
- # Damn command substitutions eat trailing whitespace. Even if
- # whitespace is the /only/ thing printed and exactly what we want from
- # the command.
- c="$(dd bs=1 count=1 <&3 2>/dev/null; printf '.')"
- c="${c%.}"
-}
-
-parse()
-{
- local buffer=''
- local escaped=false
-
- # Check for magic number or other first-line comment.
- fgetc
- if [ "x${c}" = 'x#' ]; then
- # Comment
- fgetc
- if [ "x${c}" = 'x!' ]; then
- # Magic number
- buffer="${buffer}#!"
- while :; do
- fgetc
- buffer="${buffer}${c}"
- if [ "x${c}" = "x${LF}" ]; then
- break
- fi
- done
- else
- while :; do
- if [ "x${c}" = "x${LF}" ]; then
- break
- fi
- fgetc
- done
- fi
- fi
-
- # Strip leading whitespace on the first line.
- while :; do
- case "${c}" in
- ' ' | "${HT}" | "${LF}")
- ;;
- *)
- break
- ;;
- esac
- fgetc
- done
-
- # Parse the rest of the file.
- # Like any good parser, this is some very ugly and fragile code.
- # Whitespace code must come before comment code must come before newline
- # code must come before everything else.
- while :; do
- if [ "x${c}" = 'x' ]; then
- break
- fi
- if [ "x${c}" = 'x ' ] || [ "x${c}" = "x${HT}" ]; then
- # Whitespace
- while :; do
- fgetc
- case "${c}" in
- ' ' | "${HT}")
- ;;
- "${LF}" | '#')
- # Eat trailing whitespace.
- break
- ;;
- '') return 1;;
- *)
- # Condense whitespace.
- buffer="${buffer} "
- break
- ;;
- esac
- done
- fi
- if [ "x${c}" = 'x#' ]; then
- # Comment
- while :; do
- fgetc
- if [ "x${c}" = "x${LF}" ]; then
- break
- fi
- [ "x${c}" = 'x' ] && return 1
- done
- fi
- if [ "x${c}" = "x${LF}" ]; then
- # Strip empty lines and leading whitespace.
- while :; do
- fgetc
- case "${c}" in
- ' ' | "${HT}" | "${LF}")
- ;;
- *)
- buffer="${buffer}${LF}"
- break
- ;;
- esac
- done
- fi
- if [ "x${c}" = 'x\' ]; then
- # Backslash
- buffer="${buffer}${c}"
- fgetc
- buffer="${buffer}${c}"
- [ "x${c}" = 'x' ] && return 1
- continue
- fi
- if [ "x${c}" = "x'" ]; then
- # Single quotes
- buffer="${buffer}${c}"
- while :; do
- fgetc
- buffer="${buffer}${c}"
- if [ "x${c}" = "x'" ]; then
- break
- fi
- [ "x${c}" = 'x' ] && return 1
- done
- fgetc
- continue
- fi
- if [ "x${c}" = 'x"' ]; then
- # Double quotes
- buffer="${buffer}${c}"
- while :; do
- fgetc
- buffer="${buffer}${c}"
- if ${escaped}; then
- escaped=false
- continue
- fi
- if [ "x${c}" = 'x\' ]; then
- escaped=true
- continue
- fi
- if [ "x${c}" = 'x"' ]; then
- break
- fi
- [ "x${c}" = 'x' ] && return 1
- done
- fgetc
- continue
- fi
- buffer="${buffer}${c}"
- fgetc
- done
-
- printf '%s' "${buffer}"
-}
-
-minify()
-{
- local input="${1}"
- local buffer=''
-
- # Open input file.
- if ! exec 3<"${input}"; then
- die 'Cannot open file "%s"' "${input}"
- fi
-
- # Parse input.
- if ! buffer="$(parse)"; then
- die 'Syntax error in input'
- exec 3<&-
- fi
-
- # We made it. Now close input file.
- if ! exec 3<&-; then
- die 'Cannot close file "%s"' "${input}"
- fi
-
- # Write the output.
- if [ "x${output}" = 'x-' ]; then
- printf '%s\n' "${buffer}"
- else
- if ! printf '%s\n' "${buffer}" >"${output}~"; then
- die 'Cannot write file "%s"' "${output}~"
- fi
- if ! cat "${output}~" >"${output}"; then
- die 'Cannot rename file to "%s"' "${output}"
- fi
- if ! rm "${output}~"; then
- die 'Cannot remove file "%s"' "${output}~"
- fi
- fi
-}
-
-usage()
-{
- printf 'Usage: %s [option ...] <file>\n' "${0}"
-}
-
-help()
-{
- usage
- cat <<EOF
-Options:
- -h Display this information
- -V Display minifier version information
- -o <output> Write the minified output to <output>, instead of replacing the
- existing file
-EOF
-}
-
-version()
-{
- cat <<EOF
-shmin ${VERSION}
-Copyright (C) 2015 Patrick "P. J." McDermott
-License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
-This is free software: you are free to change and redistribute it.
-There is NO WARRANTY, to the extent permitted by law.
-EOF
-}
-
-main()
-{
- local input=
-
- while getopts 'hVo:' opt; do
- case "${opt}" in
- 'h')
- help
- exit
- ;;
- 'V')
- version
- exit
- ;;
- 'o')
- output="${OPTARG}"
- ;;
- esac
- done
- shift $(($OPTIND - 1))
-
- if [ ${#} -ne 1 ]; then
- usage >&2
- exit 1
- fi
- input="${1}"
-
- if [ "x${output}" = 'x' ]; then
- output="${input}"
- fi
-
- minify "${input}"
-}
-
-main "${@}"