cosmopolitan/build/do

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#!/bin/sh
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#-*-mode:sh;indent-tabs-mode:nil;tab-width:2;coding:utf-8-*-┐
#───vi: set net ft=sh ts=2 sts=2 fenc=utf-8 :vi─────────────┘
#
# OVERVIEW
#
# Generic Command Runner
#
# DESCRIPTION
#
# This does auto mkdir and ephemeral logging.
#
# EXAMPLE
#
# build/do PROG [ARGS...]
MKDIR=${MKDIR:-$(command -v mkdir) -p} || exit
# Ensure directory creation if -o PATH flag is passed.
OUT="$TARGET"
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FIRST=1
OUTARG=0
for x; do
if [ $FIRST -eq 1 ]; then
set --
FIRST=0
elif [ $OUTARG -eq 1 ]; then
OUTARG=0
OUT="$x"
fi
case "$x" in
-o)
OUTARG=1
;;
-o*)
OUT=${x#-o}
;;
esac
set -- "$@" "$x"
done
if [ "$OUT" ]; then
OUTDIR="${OUT%/*}"
if [ "$OUTDIR" != "$OUT" ] && [ ! -d "$OUTDIR" ]; then
$MKDIR "$OUTDIR" || exit 2
fi
fi
# Log command.
if [ "$SILENT" = "0" ]; then
printf "%s\n" "$*" >&2
else
printf "$LOGFMT" "${ACTION:-BUILD}" "$TARGET" >&2
fi
exec "$@"