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#
# A Makefile to encrypt certain files to the right people.
#
# usage: "make foo.gpg" will encrypt foo.txt
#
# * If unencrypted file exists and is newer than the encrypted, it will
# encrypt it.
# * If the unencrypted file exists and is not newer than the encrypted, it
# will report "up to date" and won't encrypt it
# * If the unencrypted file doesn't exist, it will say you are dumb.
#
# If you don't have one of the keys needed for encrypting:
#
# gpg --recv-keys <fingerprint>
# gpg --fingerprint --keyid-format long <fingerprint>
#
# IT IS IMPERATIVE THAT YOU VERIFY THE FINGERPRINT.
# gpg does not verify the fingerprint when you run --recv-keys.
#
# To add additional files to be encrypted:
#
# files := file_a file_b
# file_a_readers := user1 user2
# file_b_readers := user3 user4
#
# Files should be named without their suffix. The actual source file must
# always end in .txt, and the encrypted file will always end in .gpg.
#
# After you change the x_readers list for a file, you will need to run
# `touch x.txt` in order for `make` to encrypt `x.gpg`.
#
##
## CONFIGURE HERE
##
austin := 5C71C8B497B47404
cyberta := F41BC24F31A1EF75D141EFFC7021AC01F7D46280
drebs := B2B397904D39F3B3D4BA511EA5E6BCA629BA4127
elijah := 8688B48800440025
kali := 23638BF72C593BC1
kwadronaut := BD68C7AA997FA77F
makechanges := 57F8E5D4069A9F31
mcnair := 1D52157B22532C5B
micah := 8CBF9A322861A790
parmegv := E7BD709798449799
sunbird := D45523676ED610B7
varac := 5465E77E7876ED04
meskio := C732B1D1C28F4E2F
files := accounts apple android dns financial jenkins legal panoramix twitter vps distro graphite snap thunderbird
accounts_readers := cyberta elijah mcnair micah kwadronaut
apple_readers := elijah micah kali meskio
android_readers := elijah kwadronaut cyberta
dns_readers := kwadronaut elijah micah varac
financial_readers := elijah makechanges micah
jenkins_readers := micah parmegv kwadronaut
legal_readers := elijah sunbird makechanges mcnair
panoramix_readers := kwadronaut kali micah
vps_readers := kwadronaut elijah micah varac
distro_readers := elijah micah varac kwadronaut
graphite_readers := kali varac drebs
twitter_readers := elijah kali kwadronaut micah mcnair
snap_readers := elijah kali meskio kwadronaut
thunderbird_readers := elijah drebs meskio kali
##
## NO NEED TO MODIFY BELOW HERE
##
GPG := gpg --sign --encrypt
plaintext_input := $(addsuffix .txt, ${files})
encrypted_output := $(addsuffix .gpg, ${files})
empty :=
space := $(empty) $(empty)
comma := ,
all:
@echo "USAGE: make FILE\n where FILE is one of $(subst $(space),$(comma)$(space),${encrypted_output})"
$(encrypted_output): %.gpg : %.txt
@echo "Encrypting '$<' to '$@' with these keys: $($(<:.txt=)_readers)"
$(GPG) $(foreach reader,$($(<:.txt=)_readers),--recipient $($(reader))) --output $@ $<
$(plaintext_input):
@echo "'$@' doesn't exist, why are you trying to encrypt it?"
@exit 1
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