(#109) Build: download PSScriptAnalyzer automatically

Author: ForNeVeR

.gitignore

@@ -1,3 +1,4 @@
+/language_host/current/modules/PSScriptAnalyzer
 /src/main/gen-parser
 /src/main/gen-lexer
 

.idea/dictionaries/fried.xml

@@ -1,8 +1,12 @@
+import de.undercouch.gradle.tasks.download.Download
 import org.jetbrains.intellij.tasks.PrepareSandboxTask
+import java.security.MessageDigest
+import kotlin.io.path.deleteExisting
 
 plugins {
   id("java")
   alias(libs.plugins.changelog)
+  alias(libs.plugins.download)
   alias(libs.plugins.grammarkit)
   alias(libs.plugins.intellij)
   alias(libs.plugins.kotlin)
@@ -94,7 +98,58 @@ tasks {
     kotlinOptions.jvmTarget = "17"
   }
 
+  val downloads = layout.buildDirectory.get().dir("download")
+
+  val psScriptAnalyzerVersion: String by project
+  val psScriptAnalyzerSha256Hash: String by project
+
+  val psScriptAnalyzerFileName = "PSScriptAnalyzer.$psScriptAnalyzerVersion.nupkg"
+  val psScriptAnalyzerOutFile = downloads.file(psScriptAnalyzerFileName)
+
+  val downloadPsScriptAnalyzer by register<Download>("downloadPsScriptAnalyzer") {
+    inputs.property("version", psScriptAnalyzerVersion)
+    inputs.property("hash", psScriptAnalyzerSha256Hash)
+
+    // NOTE: Do not overwrite: the verification step should delete an incorrect file.
+    // NOTE: Notably, this property allows us to skip the task completely if no inputs change.
+    overwrite(false)
+
+    src("https://github.com/PowerShell/PSScriptAnalyzer/releases/download/" +
+      "$psScriptAnalyzerVersion/$psScriptAnalyzerFileName")
+    dest(psScriptAnalyzerOutFile)
+
+    doLast {
+      val data = psScriptAnalyzerOutFile.asFile.readBytes()
+      val hash = MessageDigest.getInstance("SHA-256").let { sha256 ->
+        sha256.update(data)
+        sha256.digest().joinToString("") { "%02x".format(it) }
+      }
+      if (!hash.equals(psScriptAnalyzerSha256Hash, ignoreCase = true)) {
+        psScriptAnalyzerOutFile.asFile.toPath().deleteExisting()
+        error("PSScriptAnalyzer hash check failed. Expected ${psScriptAnalyzerSha256Hash}, but got $hash\n" +
+          "Please try running the task again, or update the expected hash in the gradle.properties file.")
+      }
+    }
+  }
+
+  val getPsScriptAnalyzer by register<Copy>("getPsScriptAnalyzer") {
+    val outDir = projectDir.resolve("language_host/current/LanguageHost/modules/PSScriptAnalyzer")
+    doFirst {
+      if (!outDir.deleteRecursively()) error("Cannot delete \"$outDir\".")
+    }
+
+    dependsOn(downloadPsScriptAnalyzer)
+    from(zipTree(psScriptAnalyzerOutFile))
+    // NuGet stuff:
+    exclude("_manifest/**", "_rels/**", "package/**", "[Content_Types].xml", "*.nuspec")
+
+    // Compatibility profiles, see https://github.com/PowerShell/PSScriptAnalyzer/issues/1148
+    exclude("compatibility_profiles/**")
+    into(outDir)
+  }
+
   withType<PrepareSandboxTask> {
+    dependsOn(getPsScriptAnalyzer)
     from("${project.rootDir}/language_host/current") {
       into("${intellij.pluginName.get()}/lib/")
     }

build.gradle.kts

@@ -1 +1,4 @@
-kotlin.stdlib.default.dependency = false
+kotlin.stdlib.default.dependency=false
+
+psScriptAnalyzerVersion=1.21.0
+psScriptAnalyzerSha256Hash=66353f139f4f1ffaa532fdeed965e70afbb8400b4810b6b2b91e091119aa6fad

gradle.properties

@@ -13,6 +13,7 @@ junixsocket = ["junixsocket-common", "junixsocket-native-common"]
 
 [plugins]
 changelog = { id = "org.jetbrains.changelog", version = "2.2.0" }
+download = { id = "de.undercouch.download", version = "5.6.0" }
 grammarkit = { id = "org.jetbrains.grammarkit", version = "2022.3.2.2" }
 intellij = { id = "org.jetbrains.intellij", version = "1.17.2" }
 kotlin = { id = "org.jetbrains.kotlin.jvm", version = "1.9.23" }