/
closure.clj
1926 lines (1598 loc) · 71.9 KB
/
closure.clj
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(ns shadow.build.closure
(:require [clojure.string :as str]
[clojure.java.io :as io]
[cljs.analyzer :as ana]
[cljs.compiler :as comp]
[cljs.env :as env]
[shadow.cljs.util :as util]
[shadow.build.output :as output]
[shadow.build.warnings :as warnings]
[shadow.build.log :as build-log]
[shadow.build.data :as data]
[shadow.build.npm :as npm]
[clojure.set :as set]
[cljs.source-map :as sm]
[clojure.data.json :as json]
[shadow.build.cache :as cache]
[cljs.compiler :as cljs-comp]
[clojure.tools.logging :as log]
[shadow.core-ext :as core-ext])
(:import (java.io StringWriter ByteArrayInputStream FileOutputStream File)
(com.google.javascript.jscomp JSError SourceFile CompilerOptions CustomPassExecutionTime
CommandLineRunner VariableMap SourceMapInput DiagnosticGroups
CheckLevel JSModule CompilerOptions$LanguageMode
BasicErrorManager Result ShadowAccess
SourceMap$DetailLevel SourceMap$Format ClosureCodingConvention CompilationLevel AnonymousFunctionNamingPolicy DiagnosticGroup NodeTraversal StrictModeCheck VariableRenamingPolicy PropertyRenamingPolicy)
(shadow.build.closure ReplaceCLJSConstants NodeEnvInlinePass ReplaceRequirePass PropertyCollector NodeStuffInlinePass)
(com.google.javascript.jscomp.deps ModuleLoader$ResolutionMode)
(java.nio.charset Charset)))
(def SHADOW-CACHE-KEY
;; timestamp to ensure that new shadow-cljs release always invalidate caches
;; technically needs to check all files but given that they'll all be in the
;; same jar one is enough
[(util/resource-last-modified "shadow/build/closure.clj")
;; in case someone sets a specific closure dependency
(util/resource-last-modified "com/google/javascript/jscomp/Compiler.class")])
(defn noop-error-manager []
(proxy [BasicErrorManager] []
(printSummary [])
(println [level error])))
(defn ^com.google.javascript.jscomp.Compiler make-closure-compiler
([]
(doto (com.google.javascript.jscomp.ShadowCompiler.)
(.disableThreads)))
([out-or-error-manager]
(doto (com.google.javascript.jscomp.ShadowCompiler. out-or-error-manager)
(.disableThreads))))
(def injected-libraries-field
(doto (-> (Class/forName "com.google.javascript.jscomp.Compiler")
(.getDeclaredField "injectedLibraries"))
(.setAccessible true)))
;;;
;;; partially taken from cljs/closure.clj
;;; removed the things we don't need
;;;
(def check-levels
{:error CheckLevel/ERROR
:warning CheckLevel/WARNING
:off CheckLevel/OFF})
(def warning-types
(reduce
(fn [warnings [registered-name group]]
(let [kw (-> registered-name
(str/replace #"[A-Z]" #(str "-" (str/lower-case %)))
keyword)]
(assoc warnings kw group)))
{}
(-> (DiagnosticGroups.)
(.getRegisteredGroups))))
(defn ^CompilerOptions$LanguageMode lang-key->lang-mode [key]
(case (keyword (str/replace (name key) #"^es" "ecmascript"))
:no-transpile CompilerOptions$LanguageMode/NO_TRANSPILE ;; same mode as input (for language-out only)
:ecmascript3 CompilerOptions$LanguageMode/ECMASCRIPT3
:ecmascript5 CompilerOptions$LanguageMode/ECMASCRIPT5
:ecmascript5-strict CompilerOptions$LanguageMode/ECMASCRIPT5_STRICT
:ecmascript6 CompilerOptions$LanguageMode/ECMASCRIPT_2015 ;; (deprecated and remapped)
:ecmascript6-strict CompilerOptions$LanguageMode/ECMASCRIPT_2015 ;; (deprecated and remapped)
:ecmascript-2015 CompilerOptions$LanguageMode/ECMASCRIPT_2015
:ecmascript6-typed CompilerOptions$LanguageMode/ECMASCRIPT6_TYPED
:ecmascript-2016 CompilerOptions$LanguageMode/ECMASCRIPT_2016
:ecmascript-2017 CompilerOptions$LanguageMode/ECMASCRIPT_2017
:ecmascript-next CompilerOptions$LanguageMode/ECMASCRIPT_NEXT))
(defn set-options
[^CompilerOptions closure-opts opts state]
(when-let [level
(case (:optimizations opts)
:advanced CompilationLevel/ADVANCED_OPTIMIZATIONS
:whitespace CompilationLevel/WHITESPACE_ONLY
:simple CompilationLevel/SIMPLE_OPTIMIZATIONS
nil)]
(.setOptionsForCompilationLevel level closure-opts))
(when (contains? opts :pretty-print)
(.setPrettyPrint closure-opts (:pretty-print opts)))
(when (:source-map opts)
(doto closure-opts
(.setSourceMapOutputPath "/dev/null")
(.setSourceMapDetailLevel SourceMap$DetailLevel/ALL)
(.setSourceMapFormat SourceMap$Format/V3)))
(when (contains? opts :pseudo-names)
(.setGeneratePseudoNames closure-opts (:pseudo-names opts)))
(when (contains? opts :anon-fn-naming-policy)
(let [policy (:anon-fn-naming-policy opts)]
(set! (.anonymousFunctionNaming closure-opts)
(case policy
:off AnonymousFunctionNamingPolicy/OFF
:unmapped AnonymousFunctionNamingPolicy/UNMAPPED
:mapped AnonymousFunctionNamingPolicy/MAPPED
(throw (IllegalArgumentException. (str "Invalid :anon-fn-naming-policy value " policy " - only :off, :unmapped, :mapped permitted")))))))
(when-let [lang-key (:language-in opts)]
(.setLanguageIn closure-opts (lang-key->lang-mode lang-key)))
(when-let [lang-key (:language-out opts)]
(.setLanguageOut closure-opts (lang-key->lang-mode lang-key)))
(when-let [extra-annotations (:closure-extra-annotations opts)]
(. closure-opts (setExtraAnnotationNames (map name extra-annotations))))
(when (contains? opts :print-input-delimiter)
(set! (.printInputDelimiter closure-opts) (:print-input-delimiter opts)))
(when (contains? opts :closure-warnings)
(doseq [[type level] (:closure-warnings opts)]
(let [group (get warning-types type)
check-level (get check-levels level)]
(if-not (and group check-level)
(util/warn state {:type ::invalid-closure-warning :key type :level level})
(. closure-opts (setWarningLevel group check-level))))))
(when (contains? opts :closure-extra-annotations)
(. closure-opts (setExtraAnnotationNames (map name (:closure-extra-annotations opts)))))
(when (contains? opts :closure-generate-exports)
(. closure-opts (setGenerateExports (:closure-generate-exports opts))))
(when (contains? opts :rewrite-polyfills)
(. closure-opts (setRewritePolyfills (:rewrite-polyfills opts))))
(. closure-opts (setOutputCharset (Charset/forName (:closure-output-charset opts "UTF-8"))))
(when (contains? opts :variable-renaming)
(.setVariableRenaming
closure-opts
(case (:variable-renaming opts)
false VariableRenamingPolicy/OFF
:off VariableRenamingPolicy/OFF
:local VariableRenamingPolicy/LOCAL
:all VariableRenamingPolicy/ALL
(throw (ex-info "invalid :variable-renaming (use :off, :local or :all)" {})))))
(when (contains? opts :property-renaming)
(.setPropertyRenaming
closure-opts
(case (:property-renaming opts)
false PropertyRenamingPolicy/OFF
:off PropertyRenamingPolicy/OFF
true PropertyRenamingPolicy/ALL_UNQUOTED
:all-unquoted PropertyRenamingPolicy/ALL_UNQUOTED
(throw (ex-info "invalid :property-renaming (use :off or :all-unquoted)" {})))))
(when (contains? opts :rename-prefix)
(.setRenamePrefix closure-opts (:rename-prefix opts)))
(when (contains? opts :rename-prefix-namespace)
(.setRenamePrefixNamespace closure-opts (:rename-prefix-namespace opts)))
closure-opts)
(defn ^CompilerOptions make-options []
(doto (CompilerOptions.)
(.setCodingConvention (ClosureCodingConvention.))))
(def default-externs
(into [] (CommandLineRunner/getDefaultExterns)))
;; should use the exters/externs-map?
(def known-js-globals
(->> '[$CLJS
CLOSURE_BASE_PATH
COMPILED
Array
Boolean
document
Date
DocumentFragment
encodeURIComponent
Error
HTMLElement
Infinity
JSON
Number
Math
Object
ReferenceError
RegExp
self
setTimeout
String
Symbol
TypeError
console
eval
global
isFinite
isNaN
parseFloat
parseInt
performance
postMessage
process
require
WebSocket
Worker
XMLHttpRequest
window
__filename
__dirname]
(into #{} (map str))))
(defn clean-collected-properties [properties]
;; some files may have been minified by closure
;; which follows this naming pattern and we can't reserve those
;; since we need them for our :advanced build later
(if-not (set/superset? properties #{"a" "b" "c" "d" "e" "f"})
properties
;; just strip out the "short" properties
(into #{} (remove #(<= (count %) 2)) properties)))
(defn extern-props-from-cljs [state]
(->> (:build-sources state)
(map #(get-in state [:sources %]))
(filter #(= :cljs (:type %)))
(map (fn [{:keys [ns file] :as src}]
;; we know those don't need externs
(when (not= ns 'cljs.core)
(let [{:shadow/keys [js-access-properties]}
(get-in state [:compiler-env :cljs.analyzer/namespaces ns])]
js-access-properties
))))
(reduce set/union #{})))
(defn extern-globals-from-cljs [state]
(->> (:build-sources state)
(map #(get-in state [:sources %]))
(filter #(= :cljs (:type %)))
(map (fn [{:keys [ns file] :as src}]
;; we know those don't need externs
(when (not= ns 'cljs.core)
(let [{:shadow/keys [js-access-global]}
(get-in state [:compiler-env :cljs.analyzer/namespaces ns])]
js-access-global
))))
(reduce set/union #{})))
(defn externs-for-build [{:keys [build-id externs-file] :as state}]
(when (and externs-file (.exists externs-file))
(let [{props false
globals true
:as lines}
(with-open [rdr (io/reader externs-file)]
(->> (line-seq rdr)
(map str/trim)
(filter seq)
(remove #(str/starts-with? % "#"))
(group-by #(str/starts-with? % "global:"))))]
[(into #{} props)
(into #{} (map #(subs % 7)) globals)]
)))
(defn generate-externs [state]
(let [[file-props file-globals]
(externs-for-build state)
js-externs?
(and (true? (get-in state [:js-options :generate-externs]))
(= :shadow (get-in state [:js-options :js-provider])))
js-props
(set/union
(when js-externs?
(:js-properties state))
(extern-props-from-cljs state)
file-props)
js-globals
(set/union
(extern-globals-from-cljs state)
file-globals)
content
(str "/** @constructor */\nfunction ShadowJS() {};\n"
(->> js-globals
(remove known-js-globals)
(map #(cljs-comp/munge % #{}))
(sort)
(map #(str "/** @const {ShadowJS} */ var " % ";"))
(str/join "\n"))
"\n"
(->> js-props
(sort)
(map #(cljs-comp/munge % #{}))
(map #(str "ShadowJS.prototype." % ";"))
(str/join "\n")))]
;; not actually required but makes it easier to verify
(let [file (data/cache-file state "externs.shadow.js")]
(io/make-parents file)
(spit file content))
(SourceFile/fromCode "externs.shadow.js" content)
))
(defn load-externs [{:keys [deps-externs] :as state} generate?]
(let [externs
(distinct
(concat
(:externs state)
(get-in state [:compiler-options :externs])
;; needed to get rid of process/global errors in cljs/core.cljs
["shadow/cljs/externs/node.js"
;; always need those
"shadow/cljs/externs/process.js"]
(when (= :js (get-in state [:build-options :module-format]))
["shadow/cljs/externs/npm.js"])))
manual-externs
(when (seq externs)
(->> externs
(map
(fn [ext]
(if-let [rc (or (io/resource ext)
(let [file (io/file ext)]
(when (.exists file)
file)))]
(SourceFile/fromCode (str "EXTERNS:" ext) (slurp rc))
(do (util/warn state {:type :missing-externs :extern ext})
nil))))
(remove nil?)
;; just to force the logging
(into [])))
deps-externs
(when (get-in state [:build-options :cljsjs-externs])
(->> (for [[deps-path externs] deps-externs
{:keys [resource-name url] :as ext} externs]
;; FIXME: use url? deps-path is accurate enough for now
(SourceFile/fromCode (str "EXTERNS:" deps-path "!/" resource-name) (slurp url)))
(into [])))
all-externs
(-> []
(into default-externs)
(into deps-externs)
(into manual-externs)
(cond->
generate?
(conj (generate-externs state))))]
;; logs when loading externs for externs inference which is pretty annoying
#_(doseq [^SourceFile ext all-externs]
(log/debug ::externs (.getName ext)))
all-externs))
(defn register-cljs-protocol-properties
"this is needed to make :check-types work
It registers all known CLJS protocols with the Closure TypeRegistry
each method is as a property on Object since most of the time Closure doesn't know the proper type
and annotating everything seems unlikely."
[{::keys [compiler compiler-options]
:keys [compiler-env build-sources]
:as state}]
(when (contains? #{:warning :error} (get-in state [:compiler-options :closure-warnings :check-types]))
(let [type-reg
(.getTypeRegistry compiler)
obj-type
(.getGlobalType type-reg "Object")]
;; some general properties
(doseq [prop
["cljs$lang$protocol_mask$partition$"
"cljs$lang$macro"
"cljs$lang$test"]]
(.registerPropertyOnType type-reg prop obj-type))
;; find all protocols and register the protocol method properties
(doseq [ana-ns (vals (::ana/namespaces compiler-env))
:let [{:keys [defs]} ana-ns]
def (vals defs)
:when (-> def :meta :protocol-symbol)]
(let [{:keys [name meta]} def
{:keys [protocol-info]} meta
prefix
(str (comp/protocol-prefix name))]
;; the marker prop
;; some.prototype.cljs$core$ISeq$ = cljs.core.PROTOCOL_SENTINEL;
(.registerPropertyOnType type-reg prefix obj-type)
(doseq [[meth-name meth-sigs] (:methods protocol-info)
:let [munged-name (comp/munge meth-name)]
meth-sig meth-sigs]
(let [arity
(count meth-sig)
prop
(str prefix munged-name "$arity$" arity)]
;; register each arity some.prototype.cljs$core$ISeq$_seq$arity$1
(.registerPropertyOnType type-reg prop obj-type)
))))))
state)
(defn read-variable-map [state name]
(let [map-file (data/cache-file state name)]
(when (.exists map-file)
(try
(VariableMap/load (.getAbsolutePath map-file))
(catch Exception e
(util/error state {:type ::map-load-error :file map-file :ex e})
nil)))))
(defn use-variable-maps? [state]
(and (not (true? (get-in state [:compiler-options :pseudo-names])))
(= :advanced (get-in state [:compiler-options :optimizations]))))
(defn read-variable-maps
[{::keys [compiler compiler-options] :as state}]
(when (use-variable-maps? state)
(when-some [data (read-variable-map state "closure.property.map")]
(.setInputPropertyMap compiler-options data))
(when-some [data (read-variable-map state "closure.variable.map")]
(.setInputVariableMap compiler-options data)))
state)
(defn write-variable-map [state name map]
(when map
(let [map-file
(doto (data/cache-file state name)
(io/make-parents))
bytes
(ByteArrayInputStream. (.toBytes map))]
(with-open [out (FileOutputStream. map-file)]
(io/copy bytes out)))))
(defn write-variable-maps [{::keys [result] :as state}]
(when (use-variable-maps? state)
(write-variable-map state "closure.variable.map" (.-variableMap result))
(write-variable-map state "closure.property.map" (.-propertyMap result)))
state)
(defmethod build-log/event->str ::warnings
[{:keys [warnings]}]
(warnings/print-warnings warnings))
(defn js-error-xf [state ^com.google.javascript.jscomp.Compiler cc]
(map (fn [^JSError err]
(let [source-name
(.-sourceName err)
line
(.getLineNumber err)
column
(.getCharno err)
mapping
(.getSourceMapping cc source-name line column)
src
(when mapping
(let [src-name (.getOriginalFile mapping)]
(try
(data/get-source-by-name state src-name)
(catch Exception e
;; we might be importing JS files with source maps
;; which map back to source files we do not have
nil))))]
(if-not src
;; FIXME: add source-excerpt if src wasn't CLJS
{:resource-name source-name
:source-name source-name
:line line
:column column
:msg (.-description err)}
(let [{:keys [resource-id resource-name file url]} src
file
(or (when file (.getAbsolutePath file))
(let [x (str url)]
(if-let [idx (str/index-of x ".m2")]
(str "~/" (subs x idx))
x))
(.getOriginalFile mapping))
line
(.getLineNumber mapping)
column
(.getColumnPosition mapping)
source-excerpt
(warnings/get-source-excerpt-for-rc state src {:line line :column column})]
{:resource-id resource-id
:resource-name resource-name
:source-name source-name
:file file
:line line
:column column
:msg (.-description err)
:source-excerpt source-excerpt}
))))))
(defn closure-source-file [name code]
(SourceFile/fromCode name code))
(defn add-input-source-maps [{:keys [build-sources] :as state} cc]
(doseq [src-id build-sources
:let [{:keys [resource-name type output-name] :as rc}
(data/get-source-by-id state src-id)]
:when (not= :shadow-js type)]
(let [{:keys [source-map-json] :as output}
(data/get-output! state rc)
source-map-json
(or source-map-json
;; source-map is CLJS source map data, need to encode it to json so closure can read it
(output/encode-source-map-json rc output))]
;; not using SourceFile/fromFile as the name that gets displayed in warnings sucks
;; public/js/cljs-runtime/cljs/core.cljs vs cljs/core.cljs
(->> (closure-source-file output-name source-map-json)
(SourceMapInput.)
(.addInputSourceMap cc resource-name))
)))
;; CLOSURE-WARNING: Property nodeGlobalRequire never defined on goog
;; Original: ~/.m2/repository/org/clojure/clojurescript/1.9.542/clojurescript-1.9.542.jar!/cljs/core.cljs [293:4]
;; cljs/core.cljs contains a call to goog.nodeGlobalRequire(...) which is only used in self-host mode
;; but causes the closure compiler --check to complain
;; since we are never going to use it just emit a noop to get rid of the warning
(def goog-nodeGlobalRequire-fix
"\ngoog.nodeGlobalRequire = function(path) { return false };\n")
(def constants-inject
(str "function shadow$keyword(name, hash) { return new cljs.core.Keyword(null, name, name, hash); };\n"
"function shadow$keyword_fqn(ns, name, hash) { return new cljs.core.Keyword(ns, name, ns + \"/\" + name, hash); };\n"))
(defn make-js-modules
[{:keys [build-modules build-sources] :as state}]
;; modules that only contain foreign sources must not be exposed to closure
;; since they technically do not depend on goog but closure only allows one root module
;; when optimizing
(let [skip-mods
(->> build-modules
(filter :all-foreign)
(map :module-id)
(into #{}))
required-js-names
(data/js-names-accessed-from-cljs state build-sources)
js-mods
(reduce
(fn [js-mods {:keys [module-id output-name depends-on sources goog-base] :as mod}]
(let [js-mod (JSModule. output-name)
sources
(->> sources
(map #(data/get-source-by-id state %))
(remove util/foreign?))
mod-provides
(->> sources
(map :provides)
(reduce set/union #{}))
mod-deps
(->> sources
(mapcat #(data/deps->syms state %))
(into #{}))
mod-constants-name
(str "shadow/cljs/constants/" (name module-id) ".js")]
(doseq [other-mod-id depends-on
:when (not (contains? skip-mods other-mod-id))
:let [other-mod (get js-mods other-mod-id)]]
(when-not other-mod
(throw (ex-info (format "module \"%s\" depends on undefined module \"%s\", defined modules are %s"
module-id
other-mod-id
(set (map :module-id build-modules)))
{:id module-id :other other-mod-id})))
(.addDependency js-mod other-mod))
;; every module that does not contain cljs.core will get a .constants js files as its first input
;; so the ReplaceCLJSConstants pass can write them into that file
;; special case for cljs.core since we shouldn't create keywords before they are defined
(when (and (contains? mod-deps 'cljs.core)
(not (contains? mod-provides 'cljs.core)))
(.add js-mod (closure-source-file mod-constants-name "")))
(doseq [{:keys [resource-id resource-name output-name ns type output] :as rc}
sources]
(let [{:keys [js source] :as output}
(data/get-output! state rc)
js
(cond
(= "goog/base.js" resource-name)
(str (output/closure-defines state)
js
goog-nodeGlobalRequire-fix)
(= :shadow-js type)
(str (when (contains? required-js-names ns)
(str "goog.provide(\"" ns "\");\n"
ns " = " (npm/shadow-js-require rc))))
:else
js)]
(.add js-mod (closure-source-file resource-name js))
(when (= ns 'cljs.core)
(.add js-mod (closure-source-file mod-constants-name constants-inject)))
))
(assoc js-mods module-id js-mod)))
{}
(->> build-modules
(remove :all-foreign)))
modules
(->> (for [{:keys [module-id] :as mod} build-modules]
(assoc mod :js-module (get js-mods module-id)))
(into []))]
(assoc state ::modules modules)))
(defn as-module-exports [defs]
(when (seq defs)
(str "\nmodule.exports={" defs "};")))
(defn make-js-module-per-source
[{:keys [compiler-env build-sources] :as state}]
(let [js-mods
(reduce
(fn [js-mods resource-id]
(let [{:keys [ns deps type resource-name output-name] :as src}
(data/get-source-by-id state resource-id)
{:keys [js] :as output}
(data/get-output! state {:resource-id resource-id})
defs
(cond
;; special case for js shim namespaces
(:export-self src)
(str "\nmodule.exports=" ns ";")
;; for every CLJS namespace, collect every ^:export def
;; and copy them to module.exports, the goog.export... will be removed
;; as that exports to global which is not what we want
ns
(->> (get-in compiler-env [::ana/namespaces ns :defs])
(vals)
(filter #(get-in % [:meta :export]))
(map :name)
(map (fn [def]
(let [export-name
(-> def name str comp/munge core-ext/safe-pr-str)]
(str export-name ":" (comp/munge def)))))
(str/join ",")
(as-module-exports))
:else
nil)
base?
(= output/goog-base-id resource-id)
code
(str (when base?
(output/closure-defines state))
js
(when base?
(str goog-nodeGlobalRequire-fix
"\ngoog.global = global;"))
;; FIXME: module.exports will become window.module.exports, rewritten later
(when (seq defs)
defs))
js-mod
(JSModule. (util/flat-filename output-name))]
(when (= :cljs type)
(.add js-mod (closure-source-file (str "shadow/cljs/constants/" resource-name) "")))
(.add js-mod (closure-source-file resource-name code))
(doseq [dep
(->> (data/deps->syms state src)
(map #(data/get-source-id-by-provide state %))
(distinct)
(into []))]
(let [other-mod (get js-mods dep)]
(when-not other-mod
(throw (ex-info (format "internal module error, no mod for dep:%s" dep)
{:dep dep})))
(.addDependency js-mod other-mod)))
(assoc js-mods resource-id js-mod)))
{}
build-sources)
modules
(->> build-sources
(map (fn [resource-id]
(let [src (data/get-source-by-id state resource-id)]
{:module-id resource-id
:name (:name src)
:output-name (util/flat-filename (:output-name src))
:js-module (get js-mods resource-id)
:sources [resource-id]})))
(into []))]
(assoc state ::modules modules)))
(defn setup
[{::keys [modules]
:keys [closure-injected-libs compiler-options] :as state}]
(let [source-map?
(boolean (:source-map compiler-options))
cc
(make-closure-compiler (noop-error-manager))
closure-opts
(doto (make-options)
(.resetWarningsGuard)
(.setNumParallelThreads (get-in state [:compiler-options :closure-threads] 1))
(.setWarningLevel DiagnosticGroups/CHECK_TYPES CheckLevel/OFF)
;; really only want the undefined variables warnings
;; must turn off CHECK_VARIABLES first or it will complain too much (REDECLARED_VARIABLES)
(.setWarningLevel DiagnosticGroups/CHECK_VARIABLES CheckLevel/OFF)
;; this one is very helpful to spot missing externs
;; (js/React...) will otherwise just work without externs
(.setWarningLevel DiagnosticGroups/UNDEFINED_VARIABLES CheckLevel/WARNING))]
(set-options closure-opts compiler-options state)
;; ensure that libs injected during transforms are injected again
;; not using polyfill-js since we might need to inject polyfills for CLJS
;; which wasn't processed yet and would clash with the manually injected libs
(let [injected-libs
(set/union
#{}
closure-injected-libs
(get-in state [:compiler-options :force-library-injection]))]
(when (seq injected-libs)
(doto closure-opts
(.setRewritePolyfills true)
(.setForceLibraryInjection injected-libs))))
;; add-input-source-maps requires options to be set, otherwise throws NPE
;; ShadowCompiler exposes this to just set options since initOptions does a bunch of stuff
;; we do not need yet
(.justSetOptions cc closure-opts)
(when source-map?
;; FIXME: path is not used at all but needs to be set
;; otherwise the applyInputSourceMaps will have no effect since it happens
;; inside a if (sourceMapOutputPath != null)
(.setSourceMapOutputPath closure-opts "/dev/null")
(.setSourceMapIncludeSourcesContent closure-opts true)
(.setApplyInputSourceMaps closure-opts true)
(add-input-source-maps state cc))
(.addCustomPass closure-opts CustomPassExecutionTime/BEFORE_CHECKS
(ReplaceCLJSConstants. cc (true? (get-in state [:compiler-options :shadow-keywords]))))
(.addCustomPass closure-opts CustomPassExecutionTime/BEFORE_CHECKS
(NodeEnvInlinePass. cc (if (= :release (:mode state))
"production"
"development")))
;; (fn [closure-compiler compiler-options state])
(doseq [cfg (:closure-configurators compiler-options)]
(cfg cc closure-opts state))
(when (= :js (get-in state [:build-options :module-format]))
;; cut the goog.exportSymbol call CLJS may have generated
;; since they will still export to window which is not what we want
(set! (.-stripTypePrefixes closure-opts) #{"goog.exportSymbol"})
;; can be anything but will be repeated a lot
;; $ vs $CLJS adds about 4kb to cljs.core alone but that is only 250 bytes after gzip
;; choosing $CLJS so the alias is the same in dev mode and avoiding potential conflicts
;; with jQuery or so when using only $
(.setRenamePrefixNamespace closure-opts "$CLJS"))
(assoc state
::externs (load-externs state true)
::compiler cc
::compiler-options closure-opts)))
(defn load-extern-properties [{::keys [extern-properties] :as state}]
(if extern-properties
state
(let [cc (make-closure-compiler)
co
(doto (make-options)
(set-options
{:optimizations :simple
:language-in :ecmascript5}
state))
externs
(load-externs state false)
result
(.compile cc externs [] co)
;; already immutable set, but incompatible
;; com.google.common.collect.RegularImmutableSet cannot be cast to clojure.lang.IPersistentCollection
extern-properties
(into #{} (ShadowAccess/getExternProperties cc))]
(when-not (.success result)
(throw (ex-info "externs trouble" {})))
(assoc state ::extern-properties extern-properties)
)))
(defn rewrite-node-global-access [js]
(-> js
;; RescopeGlobalSymbols rewrites
;; require("react")
;; to
;; (0,window.require)("react") // FIXME: why the 0,?
;; webpack & co no not recognize this
;; so we must turn it back into
;; /*********/require("react")
;; with the padding to not mess up source maps
(str/replace "(0,window.require)(" "/*********/require(")
;; window.module.exports
;; /*****/module.exports
(str/replace "window.module.exports", "/*****/module.exports")
(str/replace "window.__filename", "/*****/__filename")
(str/replace "window.__dirname", "/*****/__dirname")
))
(defn dump-js-modules [modules]
(doseq [js-mod modules]
(println
(str (format "--module %s:%d"
(.getName js-mod)
(count (.getInputs js-mod)))
(let [deps (.getDependencies js-mod)]
(when (seq deps)
(format ":%s" (->> deps
(map #(.getName %))
(str/join ",")))))
" \\"
))
(doseq [input (.getInputs js-mod)]
(println (format "--js %s \\" (.getName input))))))
(defn source-map-sources [state]
(->> (:build-sources state)
(map (fn [src-id]
(let [{:keys [resource-name] :as rc}
(get-in state [:sources src-id])
{:keys [source]}
(data/get-output! state rc)]
(when (string? source)
(closure-source-file resource-name source)))))
(remove nil?)
(into [])))
(defn add-sources-to-source-map [state source-map]
;; this needs to add ALL sources, not just the sources of the module
;; this is because cross-module motion may have moved code
;; closure will only include the relevant files but it needs to be able to find all
;; for some reason .reset removes them all so we need to repeat this for every module
;; since modules require .reset
(doseq [src-file (source-map-sources state)]
(.addSourceFile source-map (.getName src-file) (.getCode src-file))))
(defn compile-js-modules
[{::keys [externs modules compiler compiler-options] :as state}]
(let [js-mods
(->> modules
(map :js-module)
(remove nil?)
(into []))
;; _ (dump-js-modules js-mods)
^Result result
(.compileModules
compiler
externs
js-mods
compiler-options)
success?
(.success result)
;; keep track of all the injected polyfills for some reports?
injected-libs
(-> (.get injected-libraries-field compiler)
(keys)
(into #{}))
source-map
(when (and success? (get-in state [:compiler-options :source-map]))
(.getSourceMap compiler))]
(-> state
(assoc ::result result ::injected-libs injected-libs)
(cond->
success?
(update ::modules
(fn [modules]
(->> modules
(map (fn [{:keys [goog-base module-id prepend append output-name js-module sources includes] :as mod}]
;; must reset source map before calling .toSource
(when source-map
(.reset source-map)
(add-sources-to-source-map state source-map))
(let [js
(if-not js-module ;; foreign only doesnt have JSModule instance
""
(.toSource compiler js-module))]
(if (and (not (seq js))
(not (seq prepend))
(not (seq append)))
(assoc mod :dead true :output "")
(-> mod
(assoc :output js)
(cond->
(not= :goog (get-in state [:build-options :module-format]))
(update :output rewrite-node-global-access)
(and js-module source-map)
(merge (let [sw (StringWriter.)]
(.appendTo source-map sw output-name)
{:source-map-json (.toString sw)}))
))))))
(into []))))))))
(defn strip-dead-modules
"remove any modules that were completely eliminated or moved by closure