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143 lines
4.6 KiB
Bash
143 lines
4.6 KiB
Bash
#!/usr/bin/env bash
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# Shamelessly extract ASCII distro logos from neofetch
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# (https://github.com/dylanaraps/neofetch)
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# and convert them into C string constants.
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# Requires bash for associative arrays, bleh.
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# Takes a single argument: path to neofetch binary
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set -e
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usage () { echo "usage: `basename $0` path-to-neofetch" ; }
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[ $# -eq 1 ] || { usage >&2 ; exit 1 ; }
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# Obviously, we're very sensitive to the exact contents of the neofetch
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# script. We rely on:
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#
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# ...arbitrary text...
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# ^get_distro_ascii() {$
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# We set STARTED to non-empty upon hitting "get_distro_ascii()"
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STARTED=""
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# We set LOGOSTARTED to the line where the current logo starts, and unset it
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# upon the logo's termination (discovered via ^EOF$).
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LOGOSTARTED=""
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LINE=0
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LOGOS=0
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# don't emit the same key more than once, or we'll get multiple definitions
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declare -A KEYSSEEN
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while IFS= read -r line ; do
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LINE=$((LINE + 1))
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if [ -z "$STARTED" ] ; then
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if [ "$line" = 'get_distro_ascii() {' ] ; then
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STARTED="$LINE"
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# FIXME copy the copyright directly from neofetch?
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cat << EOHEADER
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#include "ncart.h"
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#include <stdlib.h>
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#include <strings.h>
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// Output of "`basename $0` $1"
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// Generated on `date -u`
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// Copyright Dylan Araps under an MIT License
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// The MIT License (MIT)
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//
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// Copyright (c) 2015-2021 Dylan Araps
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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// Found get_distro_ascii at line $LINE
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EOHEADER
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fi
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elif [ -z "$NAME" ] ; then
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NAME=`echo "$line" | sed -n -e 's/.*"\([^|]*\)"\*\?)$/\1/p'`
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if [ -n "$NAME" ] ; then
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echo "// Logo #$LOGOS: $NAME..."
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NAME=`echo $NAME | sed -e 's/\\\\/\\\\\\\\/g' | tr \ _ | tr / _ | tr -- - _`
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if [ -z "${KEYSSEEN[$NAME]}" ] ; then
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KEYSSEEN[$NAME]="$LINE"
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PRESERVE="$NAME"
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else
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echo "Warning, found duplicate name $NAME" >&2
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fi
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elif [ "$line" = "}" ] ; then # are we done with get_distro_ascii()?
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DONE="$LINE"
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echo "// Closed get_distro_ascii at line $LINE"
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break
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fi
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elif [ -z "$LOGOSTARTED" ]; then
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if echo "$line" | grep '^ *read -rd ' > /dev/null ; then
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LOGOS=$((LOGOS + 1)) # found the start of a new logo!
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LOGOSTARTED="$LINE"
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if [ -n "$PRESERVE" ] ; then
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echo -n "static const char $NAME[] = \""
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fi
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fi
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elif [ -n "$LOGOSTARTED" ]; then
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if [ "$line" = "EOF" ] ; then
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if [ -n "$PRESERVE" ] ; then
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echo "\";"
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echo "// $NAME: $((LINE - LOGOSTARTED)) lines, done at line $LINE."
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fi
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LOGOSTARTED=""
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NAME=""
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PRESERVE=""
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else
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if [ -n "$PRESERVE" ] ; then
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# FIXME don't eliminate the color templating once we carry colors
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/bin/echo -E -n "$line" | sed -e 's/\\/\\\\/g' -e 's/"/\\"/g' -e 's/${c.}//g' && /bin/echo -E -n '\n'
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fi
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fi
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fi
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done < "$1"
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# if DONE is defined, we ran to completion. yay! emit a table providing
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# access to these strings via key comparison.
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if [ -n "$DONE" ] ; then
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echo
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echo "struct neofetch_art { const char* oskey; const char* ncart; };"
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echo
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echo "const struct neofetch_art ncarts[] = {"
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for k in "${!KEYSSEEN[@]}" ; do
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echo " { \"$k\", $k },"
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done
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echo " { \"ubuntu\", \"ubuntu_old\" },"
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echo " { NULL, NULL }"
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echo "};"
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echo
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echo "const char* get_neofetch_art(const char* oskey){"
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echo " for(const struct neofetch_art* nfa = ncarts ; nfa->oskey ; ++nfa){"
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echo " if(strcasecmp(nfa->oskey, oskey) == 0){"
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echo " return nfa->ncart;"
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echo " }"
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echo " }"
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echo " return NULL;"
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echo "}"
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exit 0
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fi
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# unsurprisingly, this incredibly brittle code has broken. crap!
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if [ -z "$STARTED" ] ; then
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echo "Failed; never found get_distro_ascii(). Alas..." >&2
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else
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echo "Failed; never closed out get_distro_ascii(). Hrmm..." >&2
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fi
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exit 1
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