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#!/bin/sh -e
# ./scripts/deplist system | ./scripts/genmake [0|1]
##
# This script reads from stdin and generates
# a Makefile in the repository's root.
#
# The first argument to this script is a value {0,1}
# indicating whether to generate real rules or fake
# (simulation) rules. Fake rules might be 'sleep 1'
# or can be user-defined.
#
# NOTE: out-of-tree builds are not supported.
#
HERE="$(dirname $(readlink -f ${0}))";
DEST="${HERE}"/../Makefile;
TEMP="$(mktemp)";
##
# Build recipes.
#
# FIXME: is $(@D) POSIX or $(%/built=%) required?
#
rule_real=$(cat <<"EOF"
@cd $(@D) && abuild -r
EOF
);
rule_fake=$(cat <<"EOF"
@echo $(@D)
@sleep 1
EOF
);
##
# Read deplist from stdin, synthesize Makefile targets.
#
awk '{ $(NF+1)=$1; print $0 }' `# duplicate first column to last` \
| sed > "${TEMP}" -E `# use extended regex, write to temp file ` \
-e 's/ /: /' `# append colon to first column` \
-e '/: /s@( |$)@/built @2g' `# append '/built' to all dependencies` \
-e 's/ $//g' `# trim trailing spaces` \
;
##
# Internal; convenience only.
#
list=$(grep : "${TEMP}" \
| cut -d: -f1 \
| xargs \
);
##
# Create (or truncate) the output Makefile.
#
# Default target builds everything.
#
printf "all: %s\n" "${list}" > "${DEST}";
##
# Append generic target build recipe.
#
rule=;
case ${1} in
0) rule="${rule_real}"; ;;
1) rule="${rule_fake}"; ;;
*) printf "E: Invalid mode '%s'\n" "${1}"; exit 1; ;;
esac
cat >> "${DEST}" <<EOF
%/built: %/APKBUILD
${rule}
@touch \$@
clean:
@find \$(CURDIR) -type f -name built -print -delete
distclean:
@rm -fv \
\$(CURDIR)/Makefile \
\$(CURDIR)/scripts/.index \
\$(CURDIR)/scripts/sgrep \
\$(CURDIR)/scripts/tsort \
;
EOF
##
# Append target rules to output Makefile.
#
cat >> "${DEST}" "${TEMP}";
##
# Clean up.
#
rm "${TEMP}";
|
