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|
#!/usr/bin/env bash
set -euo pipefail
: "${CARGO:=cargo}"
# A list of the licenses that we currently allow in our code.
#
# If a package supports multiple licenses (using OR), then we are okay
# if it supports _any_ of these licenses.
#
# We don't currently do a good job of understanding AND, so
# interesting license combinations that involve AND may need to be given
# in quotes.
RECOGNIZED_LICENSES=(
Apache-2.0
BSD-2-Clause
BSD-3-Clause
CC0-1.0
ISC
MIT
Unicode-DFS-2016
Unlicense
Zlib
"MIT AND BSD-3-Clause"
"(MIT OR Apache-2.0) AND Unicode-DFS-2016"
)
# List of packages that don't list a license.
NO_LICENSE=(
# The license for "ring" is something like "ISC AND openssl AND
# ssleay AND MIT"; the openssl license is not up-to-date with
# modern openssl. It includes an advertising clause. :P
#
# See https://gitlab.torproject.org/tpo/core/arti/-/issues/493 for
# our related ticket.
ring
# License appears to be ISC.
webpki
rustls-webpki
)
# List of packages which we allow to use the MPL-2.0 license.
#
# We need to check these individually because, if the party says
# "MPL-2.0" without actually including the text of exhibit A from the
# MPL, it is not unambiguous that they have applied MPL-2.0 to their
# code.
#
# (See https://gitlab.torproject.org/tpo/core/arti/-/issues/845)
MPL_20_OK=(
# This one is pending: See https://github.com/soc/option-ext/pull/4
option-ext
generational-arena
dynasm
dynasmrt
)
# List of packages allowed to use the LGPL-3.0-only license.
#
# We aren't including LGPL code in the general Arti dependency tree, this is
# just meant to be a limited whitelist which allows some of our own crates
# we are developing under the LGPL.
LGPL_30_ONLY_OK=(
equix
hashx
)
containsElement () {
local e match="$1"
shift
for e; do
[[ "$e" == "$match" ]] && return 0;
done
return 1
}
if ! $CARGO license --help >/dev/null; then
echo "cargo-license is not installed!"
echo
echo "For reasonable results, run:"
echo " cargo install cargo-license"
exit 2
fi
cd "$(dirname "$0")/.."
# The caller might reasonably have set CARGO to something containing spaces.
# So collect the output before we set IFS.
output=$($CARGO license --all-features -t)
problems=0
IFS=$'\n'
for line in $output; do
package=$(echo "$line" | cut -f1)
licenses=$(echo "$line" | cut -f5)
# skip the first line.
if test "$package" = "name" && test "$licenses" = "license"; then
continue;
fi
if test -z "$licenses"; then
if ! containsElement "$package" "${NO_LICENSE[@]}"; then
echo "$package has no license"
problems=1
fi
continue
fi
if test "$licenses" = "MPL-2.0"; then
if ! containsElement "$package" "${MPL_20_OK[@]}"; then
echo "$package uses MPL-2.0 but has not been allow-listed."
problems=1
fi
continue
fi
if test "$licenses" = "LGPL-3.0-only"; then
if ! containsElement "$package" "${LGPL_30_ONLY_OK[@]}"; then
echo "$package uses LGPL-3.0-only but has not been allow-listed."
problems=1
fi
continue
fi
found_ok=0
if containsElement "$licenses" "${RECOGNIZED_LICENSES[@]}"; then
found_ok=1
else
# TODO: By Splitting on "OR" without parsing, this can give bogus
# elements in the output if the license is something like "(A OR
# B) AND C". Fortunately the parenthesis will save us from false
# negatives here, but in the end we should probably switch to a
# real parser.
for lic in ${licenses// OR /$'\n'}; do
if containsElement "$lic" "${RECOGNIZED_LICENSES[@]}"; then
found_ok=1
break
fi
done
fi
if test $found_ok = "0"; then
echo "$package does not advertise any supported license!"
echo " ($package: $licenses)"
problems=1
fi
done
if test "$problems" = 1; then
echo "You can suppress the above warnings by editing $0..."
echo "but only do so if we are actually okay with all the licenses!"
fi
exit "$problems"
|
