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classpath.clj
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classpath.clj
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(ns clojure-lsp.classpath
(:require
[babashka.fs :as fs]
[clojure-lsp.logger :as logger]
[clojure-lsp.producer :as producer]
[clojure-lsp.settings :as settings]
[clojure-lsp.shared :as shared]
[clojure-lsp.source-paths :as source-paths]
[clojure.java.io :as io]
[clojure.java.shell :as shell]
[clojure.set :as set]
[clojure.string :as string])
(:import
(java.io ByteArrayOutputStream)
(java.security MessageDigest)))
(set! *warn-on-reflection* true)
(defn ^:private md5 [^java.io.File file]
(let [bytes'
(with-open [xin (io/input-stream file)
xout (ByteArrayOutputStream.)]
(io/copy xin xout)
(.toByteArray xout))
algorithm (MessageDigest/getInstance "MD5")
raw (.digest algorithm bytes')]
(format "%032x" (BigInteger. 1 raw))))
(defn ^:private valid-project-spec? [root-path {:keys [project-path]}]
(let [project-file (shared/to-file root-path project-path)]
(shared/file-exists? project-file)))
(defn ^:private project-root->project-dep-files [project-root dep-file-path settings]
(let [project-dep-file (io/file project-root dep-file-path)]
(if (string/ends-with? (str project-dep-file) "deps.edn")
(if-let [local-roots (seq (source-paths/deps-file->local-roots project-dep-file settings))]
(concat [project-dep-file]
(->> local-roots
(map #(shared/relativize-filepath % project-root))
(map #(io/file project-root % "deps.edn"))
(filter shared/file-exists?)))
[project-dep-file])
[project-dep-file])))
(defn project-specs->hash [root-path settings]
(->> (:project-specs settings)
(filter (partial valid-project-spec? root-path))
(map (fn [{:keys [project-path]}]
(map md5 (project-root->project-dep-files (str root-path) project-path settings))))
flatten
(reduce str)))
(defn ^:private psh-cmd
"Return the command vector that uses the PowerShell executable PSH to
invoke CMD-AND-ARGS."
([psh & cmd-and-args]
(into [psh "-NoProfile" "-Command"] cmd-and-args)))
(defn ^:private locate-executable
"Locate and return the full path to the EXECUTABLE."
[executable]
(some-> ^java.nio.file.Path (fs/which executable) .toString))
(defn ^:private shell
"Execute CMD-AND-ARGS with `clojure.java.shell/sh`, of which see."
[& cmd-and-args]
(apply shell/sh cmd-and-args))
(defn ^:private classpath-cmd->normalize
"Return CLASSPATH-CMD, but with the EXEC expanded to its full path (if found).
If the EXEC cannot be found, is one of clojure or lein and the
program is running on MS-Windows, then, if possible, it tries to
replace it with a PowerShell cmd invocation sequence in the
following manner, while keeping ARGS the same.
There could be two PowerShell executable available in the system
path: powershell.exe (up to version 5.1, comes with windows) and/or
pwsh.exe (versions 6 and beyond, can be installed on demand).
If powershell.exe is available, it checks if the EXEC is installed
in it as a module, and creates an invocation sequence as such to
replace the EXEC. If not, it tries the same with pwsh.exe."
[[exec & args :as classpath-cmd]]
(if (and shared/windows-os?
(#{"clojure" "lein"} exec)
(not (locate-executable exec)))
(if-let [up (some #(when-let [ps (locate-executable %)]
(when (= 0 (:exit (apply shell (psh-cmd ps "Get-Command" exec))))
(psh-cmd ps exec)))
["powershell" "pwsh"])]
(into up args)
classpath-cmd)
(or (some->> (locate-executable exec)
(assoc classpath-cmd 0))
classpath-cmd)))
(defn ^:private lookup-classpath! [root-path {:keys [classpath-cmd env]}]
(let [command (string/join " " classpath-cmd)]
(logger/info (format "Finding classpath via `%s`" command))
(try
(let [sep (re-pattern (System/getProperty "path.separator"))
{:keys [exit out err]} (apply shell (into classpath-cmd
(cond-> [:dir (str root-path)]
env (conj :env (merge {} (System/getenv) env)))))]
(if (= 0 exit)
(let [paths (-> out
string/split-lines
last
string/trim-newline
(string/split sep))]
(logger/debug "Classpath found, paths: " paths)
{:command command
:paths (set paths)})
{:command command
:error err}))
(catch Exception e
{:command command
:error (.getMessage e)}))))
(defn ^:private lookup-classpath-handling-error! [project-spec root-path producer]
(let [{:keys [command error paths]} (lookup-classpath! root-path project-spec)
retry-action "Retry"
ignore-action "Ignore"]
(if error
(do
(logger/error (format "Error while looking up classpath info in %s. Error: %s" (str root-path) error))
(if-let [chosen-action (producer/show-message-request
producer
(format (str "LSP classpath lookup failed when running `%s`. Some features may not work properly if ignored.\n\n"
"Error: %s\n\nChoose an option:") command error)
:warning
[{:title retry-action}
{:title ignore-action}])]
(if (= retry-action chosen-action)
(recur project-spec root-path producer)
(do
(logger/warn (format "Classpath lookup retry skipped by user"))
paths))
(producer/show-message producer (format "Classpath lookup failed when running `%s`. Some features may not work properly." command) :error error)))
paths)))
(defn scan-classpath! [{:keys [db* producer]}]
(let [db @db*
root-path (shared/uri->path (:project-root-uri db))]
(->> (settings/get db [:project-specs])
(filter (partial valid-project-spec? root-path))
(mapv #(lookup-classpath-handling-error! % root-path producer))
(reduce set/union))))
(defn ^:private lein-source-aliases [source-aliases]
(some->> source-aliases
(map #(str "+" (name %)))
seq
(string/join ",")
(conj ["with-profile"])))
(defn ^:private kw->str
"Given a keyword, returns a string with the ':' omitted, nil if `kw` is not a keyword."
[kw]
(cond
(qualified-keyword? kw)
(str (namespace kw) "/" (name kw))
(keyword? kw)
(name kw)
:else
nil))
(defn ^:private deps-source-aliases [source-aliases]
(some->> source-aliases
(map kw->str)
seq
(string/join ":")
(str "-A:")
vector))
(defn default-project-specs [source-aliases]
(->> [{:project-path "project.clj"
:classpath-cmd (->> ["lein" (lein-source-aliases source-aliases) "classpath"]
flatten
(remove nil?)
vec)}
{:project-path "deps.edn"
:classpath-cmd (->> ["clojure" (deps-source-aliases source-aliases) "-Spath"]
flatten
(remove nil?)
vec)}
{:project-path "build.boot"
:classpath-cmd ["boot" "show" "--fake-classpath"]}
{:project-path "shadow-cljs.edn"
:classpath-cmd ["npx" "shadow-cljs" "classpath"]}
{:project-path "bb.edn"
:classpath-cmd ["bb" "print-deps" "--format" "classpath"]}]
(map #(update % :classpath-cmd classpath-cmd->normalize))))