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pypi.clj
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pypi.clj
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(ns pip-license-checker.pypi
"Python PyPI API functions"
(:gen-class)
(:require
;;[clojure.spec.test.alpha :refer [instrument]]
[cheshire.core :as json]
[clj-http.client :as http]
[clojure.spec.alpha :as s]
[clojure.string :as str]
[pip-license-checker.github :as github]
[pip-license-checker.spec :as sp]
[pip-license-checker.file :as file]
[pip-license-checker.filters :as filters]
[pip-license-checker.version :as version]
[pip-license-checker.license :as license]))
(def settings-http-client
{:socket-timeout 3000
:connection-timeout 3000
:max-redirects 3})
(def url-pypi-base "https://pypi.org/pypi")
(def license-undefined #{"" "UNKNOWN" [] ["UNKNOWN"]})
(def unspecific-license-classifiers #{"License :: OSI Approved"})
(def regex-match-classifier #"License :: .*")
(def regex-split-classifier #" :: ")
;; Get API response, parse it
(defn get-releases
"Get seq of versions available for a package
NB! versions are not sorted!"
[package-name]
(let [url (str/join "/" [url-pypi-base package-name "json"])
response (try (http/get url settings-http-client)
(catch Exception _ nil))
body (:body response)
data (json/parse-string body)
releases (get data "releases")
versions (keys releases)
versions-parsed (map #(version/parse-version %) versions)
versions-valid (filter #(not (nil? %)) versions-parsed)]
versions-valid))
(s/fdef get-requirement-version
:args (s/cat
:requirement ::sp/requirement
:pre (s/? keyword?)
:value (s/? boolean?))
:ret ::sp/requirement-response)
(defn get-requirement-version
"Return respone of GET request to PyPI API for requirement"
[requirement & {:keys [pre] :or {pre true}}]
(let [{:keys [name specifiers]} requirement
versions (get-releases name)
version (version/get-version specifiers versions :pre pre)
url
(if (= version nil)
(str/join "/" [url-pypi-base name "json"])
(str/join "/" [url-pypi-base name version "json"]))
response (try (http/get url settings-http-client) (catch Exception _ nil))
origin {:name name
:version (or version (:orig (last (first specifiers))))}]
(if (and response version)
{:ok? true :requirement origin :response (:body response)}
{:ok? false :requirement origin})))
(s/fdef requirement-response->data
:args ::sp/requirement-response
:ret ::sp/requirement-response-data)
(defn requirement-response->data
"Return hash-map from PyPI API JSON response"
[response]
(let [{:keys [ok? response requirement]} response]
(if ok?
{:ok? true :requirement requirement :data (json/parse-string response)}
{:ok? false :requirement requirement})))
;; Helpers to get license name and description
(defn classifiers->license
"Get first most detailed license name from PyPI trove classifiers list"
[classifiers]
(let [license-classifiers
(filter #(re-matches regex-match-classifier %) classifiers)
specifict-classifiers
(remove #(contains? unspecific-license-classifiers %) license-classifiers)
license-names
(map #(last (str/split % regex-split-classifier)) specifict-classifiers)
classifier (str/join ", " license-names)
result (if (= classifier "") nil classifier)]
result))
(defn data->license-map
"Get license name from info.classifiers or info.license field of PyPI API data"
[data]
(let [info (get data "info")
{:strs [license classifiers home_page]} info
license-license (if (contains? license-undefined license) nil license)
classifiers-license (classifiers->license classifiers)
license-name (or
classifiers-license
license-license
(github/homepage->license-name home_page))
license-desc
(license/name->type (or license-name license/name-error))]
(if license-name
{:name license-name :type license-desc}
license/data-error)))
;; Get license data from API JSON
(s/fdef data->license
:args ::sp/requirement-response-data
:ret ::sp/requirement-response-license)
(defn data->license
"Return hash-map with license data"
[json-data]
(let [{:keys [ok? requirement data]} json-data]
(if ok?
{:ok? true
:requirement requirement
:license (data->license-map data)}
{:ok? false
:requirement requirement
:license license/data-error})))
(s/fdef requirement->license
:args (s/cat
:requirement ::sp/requirement
:pre (s/? keyword?)
:value (s/? boolean?))
:ret ::sp/requirement-response-license)
(defn requirement->license
"Return license hash-map for requirement"
[requirement & {:keys [pre]}]
(let [resp (get-requirement-version requirement :pre pre)
data (requirement-response->data resp)
license (data->license data)]
license))
(defn get-all-requirements
"Get a sequence of all requirements"
[packages requirements]
(let [file-packages (file/get-requirement-lines requirements)]
(concat packages file-packages)))
;; Entrypoint
(s/fdef get-parsed-requiements
:args (s/cat
:requirements ::sp/requirements-cli-arg
:packages ::sp/packages-cli-arg
:options ::sp/options-cli-arg)
:ret (s/coll-of ::sp/requirement-response-license))
(defn get-parsed-requiements
"Apply filters and get verdicts for all requirements"
[packages requirements options]
(let [exclude-pattern (:exclude options)
pre (:pre options)
licenses (->> (get-all-requirements packages requirements)
(filters/remove-requirements-internal-rules)
(filters/remove-requirements-user-rules exclude-pattern)
(map filters/sanitize-requirement)
(map filters/requirement->map)
(pmap #(requirement->license % :pre pre)))]
licenses))
;;
;; Instrumented functions - uncomment only while testing
;;
;; (instrument `get-requirement-version)
;; (instrument `requirement-response->data)
;; (instrument `data->license)
;; (instrument `requirement->license)