my-env/gen-makefile

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#!/bin/bash
mv Makefile Makefile.bak
cat << EOF >> Makefile
# Autogenerated at $(date +'%d.%m.%Y %H:%M') using ${BASH_SOURCE[0]}
.DEFAULT_GOAL := help
EOF
for file in ./packs/*; do
cat ${file} >> Makefile
echo >> Makefile
done;
for file in ./install/*; do
name=${file##*/}
name=${name%.sh}
desc=$(grep -m 1 -oP "(?<=^##makedesc:\s).*$" ${file})
[ -z "$desc" ] && desc='<no description>'
echo -e "##${name}: ${desc}\n${name}:\n\t@${file}\n" >> Makefile
done;
cat << "EOF" >> Makefile
##help: Show this help message
help: Makefile
@echo "Usage:"
@echo "\tmake <goal>\t - Install software"
@echo "\tmake +<goal>\t - Install software"
@echo "\tmake ^<goal>\t - Upgrade software"
@echo "\tmake @<goal>\t - Uninstall software"
@echo "Available goals:"
@sed -n 's/^##//p' $< | column -ts ':' | sed -e "s/^/\t/"
+%:
@$(MAKE) $*
^%:
@./upgrade/$*
@%:
@./uninstall/$*
EOF
echo "New ./Makefile has been generated!"
echo "Old one has been saved as ./Makefile.bak"
echo
make -s help