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license.clj
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license.clj
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(ns pip-license-checker.license
"Licenses constants"
(:gen-class)
(:require
[clojure.string :as str]))
;; Lincense regex
;;
;; When discriminating between permissive and copyleft licenses here,
;; we are mostly concerned with the dynamic *linking*, because this is
;; the most used aspect of the dependency libraries for a Python program.
;; See more details here (be careful though, as not all the details
;; are acurate enough):
;; https://en.wikipedia.org/wiki/Comparison_of_free_and_open-source_software_licences
;;
;; Another useful links to learn about licenses
;;
;; GNU licenses (GPL, LGPL, AGPL)
;; https://www.gnu.org/licenses/
;; https://www.gnu.org/licenses/gpl-3.0.txt
;; https://www.gnu.org/licenses/gpl-faq.html
;; Free Software Movement license list
;; https://www.gnu.org/licenses/license-list.html
;; OSI license list
;; https://opensource.org/licenses
;; European Union Public Licence (EUPL)
;; https://joinup.ec.europa.eu/collection/eupl/eupl-text-eupl-12
;; https://joinup.ec.europa.eu/collection/eupl/matrix-eupl-compatible-open-source-licences#section-3
;; Mozilla Public License (MPL)
;; https://www.mozilla.org/en-US/MPL/
;; https://www.mozilla.org/en-US/MPL/2.0/FAQ/
;; CeCILL
;; https://cecill.info/licences.en.html
;; https://cecill.info/faq.en.html
;; Eclipse Public License
;; https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
;; https://www.eclipse.org/legal/epl-2.0/faq.php
;; ODC-BY, ODBl
;; https://opendatacommons.org/licenses/by/1-0/
;; https://opendatacommons.org/licenses/odbl/1-0/
;; Misc
;; https://opensource.stackexchange.com/
(def regex-ignore-case #"(?i)")
(def regex-list-copyleft-network
"Copyleft licenses that consider access over the network as distribution"
[#"\bAffero"
#"\bAGPL"
#"GNU Affero General Public License"
#"\bOSL"
#"Open Software License"
#"\bRPSL"
#"RealNetworks Public Source License"
#"\bWatcom"
#"Sybase Open Watcom Public License"])
(def regex-list-copyleft-strong
"Copyleft licenses with wide range of activities considered as derivation"
[#"GNU General Public License(?!.*classpath|.*linking|.*exception)"
#"\bGPL(?!.*classpath|.*linking|.*exception)"
#"IBM Public License"
#"\bRPL"
#"Reciprocal Public License"
#"Sleepycat License"])
(def regex-list-copyleft-weak
"Weak or partial copyleft that usually not triggered for static and/or dynamic linking"
[#"GNU Lesser General Public License"
#"GNU Library or Lesser General Public License"
#"\bLGPL"
#"GNU General Public License.*(?:classpath|linking|exception)"
#"\bGPL.*(?:classpath|linking|exception)"
#"\bMPL"
#"Mozilla Public License"
#"\bMotosoto"
#"Nokia Open Source License"
#"\bNPL"
#"Netscape Public License"
#"\bNOSL"
#"Netizen Open Source License"
#"\bODbL"
#"Open Database License"
#"BitTorrent Open Source License"
#"\bSPL"
#"Sun Public License"
#"\bEPL"
#"Eclipse Public License"
;; Linking as producing a derivative work is not confirmed by case law yet,
;; but probably contradicts the EU laws, that's why weak copyleft
;; If proved otherwise, may be moved to a strong copyleft list
;; See https://joinup.ec.europa.eu/collection/eupl/matrix-eupl-compatible-open-source-licences#section-3
#"\bEUPL"
#"European Union Public Licence"
#"Eurosym License"
#"\bCPL"
#"Common Public License"
#"\bCDDL"
#"Common Development and Distribution License"
#"CeCILL-C"
#"CEA CNRS Inria Logiciel Libre License"
#"CeCILL-2.1"
#"\bAPSL"
#"Apple Public Source License"
#"Ms-RL"
#"Microsoft Reciprocal License"
#"\bOFL"
#"SIL Open Font License"])
(def regex-list-copyleft-all
"All copyleft licenses"
(into
[]
(concat
regex-list-copyleft-network
regex-list-copyleft-strong
regex-list-copyleft-weak)))
(def regex-list-permissive
"Permissive licenses"
[#"\bAFL"
#"Academic Free License"
#"\bApache"
#"Apache Software License"
#"\bAAL"
#"Attribution Assurance License"
#"Artistic"
#"BSD"
#"CC0"
#"CC(-?|\s*)BY(-?|\s*)(?!.*SA|.*share|.*ND|.*derivative|.*NC|.*commercial)"
#"CeCILL-B Free Software License Agreement"
#"CeCILL-B"
#"Eiffel Forum License"
#"Historical Permission Notice and Disclaimer"
#"\bHPND"
#"MIT License"
#"\bMIT"
#"MirOS"
#"Intel Open Source License"
#"\bISC\b"
#"\bISCL"
#"ISC License"
#"Ms-PL"
#"Microsoft Public License"
#"\bODC(-?|\s*)BY"
#"Open Data Commons Attribution License"
#"PostgreSQL License"
#"Python Software Foundation License"
#"Python License"
#"Public Domain"
#"\bQPL"
#"Q Public License"
#"Repoze Public License"
#"Unlicense"
#"\bUPL"
#"Universal Permissive License"
#"\bUIUC"
#"University of Illinois"
#"NCSA Open Source License"
#"University of Illinois/NCSA Open Source License"
#"Vovida Software License"
#"W3C"
#"X.Net License"
#"Zope Public License"
#"zlib/libpng"
#"WTFPL"
#"Do What the Fuck You Want To Public License"])
;; Const
(def name-error "Error")
(def type-error "Error")
(def type-copyleft-all "Copyleft")
(def type-copyleft-weak "WeakCopyleft")
(def type-copyleft-strong "StrongCopyleft")
(def type-copyleft-network "NetworkCopyleft")
(def type-permissive "Permissive")
(def type-other "Other")
(def types-copyleft
(sorted-set type-copyleft-network
type-copyleft-strong
type-copyleft-weak))
(def types
(sorted-set type-error
type-copyleft-all
type-copyleft-weak
type-copyleft-strong
type-copyleft-network
type-permissive
type-other))
(def invalid-type
(format "Invalid license type. Use one of: %s"
(str/join ", " types)))
(def data-error {:name name-error :type type-error})
;; Functions
(defn is-type-valid?
"Return true if license-type string is valid, false otherwise"
[license-type]
(contains? types license-type))
(defn strings->pattern
"Get regex pattern from sequence of strings"
[patterns]
(re-pattern
(str regex-ignore-case
(apply str (interpose "|" (map #(str "(?:" % ")") patterns))))))
(defn name->type
"Get license type by its name"
[name]
(let [regex-copyleft-network (strings->pattern regex-list-copyleft-network)
regex-copyleft-strong (strings->pattern regex-list-copyleft-strong)
regex-copyleft-weak (strings->pattern regex-list-copyleft-weak)
match-copyleft-network (some? (re-find regex-copyleft-network name))
match-copyleft-strong (some? (re-find regex-copyleft-strong name))
match-copyleft-weak (some? (re-find regex-copyleft-weak name))
regex-permissive (strings->pattern regex-list-permissive)
match-permissive (some? (re-find regex-permissive name))]
(cond
match-copyleft-network type-copyleft-network
match-copyleft-strong type-copyleft-strong
match-copyleft-weak type-copyleft-weak
match-permissive type-permissive
:else type-other)))