Use git shortlog for gathering contributors

buildSrc/src/main/kotlin/cc/tweaked/gradle/CCTweakedExtension.kt

@@ -2,6 +2,7 @@
 
 import net.ltgt.gradle.errorprone.CheckSeverity
 import net.ltgt.gradle.errorprone.errorprone
+import org.gradle.api.GradleException
 import org.gradle.api.NamedDomainObjectProvider
 import org.gradle.api.Project
 import org.gradle.api.Task
@@ -25,10 +26,8 @@
 import org.gradle.testing.jacoco.tasks.JacocoReport
 import org.jetbrains.kotlin.gradle.dsl.KotlinProjectExtension
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-import java.io.BufferedWriter
 import java.io.File
 import java.io.IOException
-import java.io.OutputStreamWriter
 import java.net.URI
 import java.net.URL
 import java.util.regex.Pattern
@@ -39,43 +38,30 @@ abstract class CCTweakedExtension(
 ) {
     /** Get the hash of the latest git commit. */
     val gitHash: Provider<String> = gitProvider(project, "<no git hash>") {
-        ProcessHelpers.captureOut("git", "-C", project.projectDir.absolutePath, "rev-parse", "HEAD").trim()
+        ProcessHelpers.captureOut("git", "-C", project.rootProject.projectDir.absolutePath, "rev-parse", "HEAD").trim()
     }
 
     /** Get the current git branch. */
     val gitBranch: Provider<String> = gitProvider(project, "<no git branch>") {
-        ProcessHelpers.captureOut("git", "-C", project.projectDir.absolutePath, "rev-parse", "--abbrev-ref", "HEAD")
+        ProcessHelpers.captureOut("git", "-C", project.rootProject.projectDir.absolutePath, "rev-parse", "--abbrev-ref", "HEAD")
             .trim()
     }
 
     /** Get a list of all contributors to the project. */
     val gitContributors: Provider<List<String>> = gitProvider(project, listOf()) {
-        val authors: Set<String> = HashSet(
-            ProcessHelpers.captureLines(
-                "git", "-C", project.projectDir.absolutePath, "log",
-                "--format=tformat:%an <%ae>%n%cn <%ce>%n%(trailers:key=Co-authored-by,valueonly)",
-            ),
+        ProcessHelpers.captureLines(
+            "git", "-C", project.rootProject.projectDir.absolutePath, "shortlog", "-ns",
+            "--group=author", "--group=trailer:co-authored-by", "HEAD",
         )
-        val process = ProcessHelpers.startProcess("git", "check-mailmap", "--stdin")
-        BufferedWriter(OutputStreamWriter(process.outputStream)).use { writer ->
-            for (authorName in authors) {
-                var author = authorName
-
-                if (author.isEmpty()) continue
-                if (!author.endsWith(">")) author += ">" // Some commits have broken Co-Authored-By lines!
-                writer.write(author)
-                writer.newLine()
+            .asSequence()
+            .map {
+                val matcher = COMMIT_COUNTS.matcher(it)
+                matcher.find()
+                matcher.group(1)
             }
-        }
-        val contributors: MutableSet<String> = HashSet()
-        for (authorLine in ProcessHelpers.captureLines(process)) {
-            val matcher = EMAIL.matcher(authorLine)
-            matcher.find()
-            val name = matcher.group(1)
-            if (!IGNORED_USERS.contains(name)) contributors.add(name)
-        }
-
-        contributors.sortedWith(String.CASE_INSENSITIVE_ORDER)
+            .filter { !IGNORED_USERS.contains(it) }
+            .toList()
+            .sortedWith(String.CASE_INSENSITIVE_ORDER)
     }
 
     /**
@@ -257,7 +243,7 @@ fun downloadFile(label: String, url: String): File {
     }
 
     companion object {
-        private val EMAIL = Pattern.compile("^([^<]+) <.+>$")
+        private val COMMIT_COUNTS = Pattern.compile("""^\s*[0-9]+\s+(.*)$""")
         private val IGNORED_USERS = setOf(
             "GitHub", "Daniel Ratcliffe", "Weblate",
         )
@@ -269,6 +255,9 @@ private fun <T> gitProvider(project: Project, default: T, supplier: () -> T): Pr
                 } catch (e: IOException) {
                     project.logger.error("Cannot read Git repository: ${e.message}")
                     default
+                } catch (e: GradleException) {
+                    project.logger.error("Cannot read Git repository: ${e.message}")
+                    default
                 }
             }
         }

buildSrc/src/main/kotlin/cc/tweaked/gradle/ProcessHelpers.kt

@@ -4,33 +4,37 @@
 import org.gradle.api.GradleException
 import java.io.BufferedReader
 import java.io.File
-import java.io.IOException
 import java.io.InputStreamReader
 
 internal object ProcessHelpers {
     fun startProcess(vararg command: String): Process {
         // Something randomly passes in "GIT_DIR=" as an environment variable which clobbers everything else. Don't
         // inherit the environment array!
-        return Runtime.getRuntime().exec(command, arrayOfNulls(0))
+        return ProcessBuilder()
+            .command(*command)
+            .redirectError(ProcessBuilder.Redirect.INHERIT)
+            .also { it.environment().clear() }
+            .start()
     }
 
     fun captureOut(vararg command: String): String {
         val process = startProcess(*command)
+        process.outputStream.close()
+
         val result = ProcessGroovyMethods.getText(process)
-        if (process.waitFor() != 0) throw IOException("Command exited with a non-0 status")
+        process.waitForOrThrow("Failed to run command")
         return result
     }
 
     fun captureLines(vararg command: String): List<String> {
-        return captureLines(startProcess(*command))
-    }
+        val process = startProcess(*command)
+        process.outputStream.close()
 
-    fun captureLines(process: Process): List<String> {
         val out = BufferedReader(InputStreamReader(process.inputStream)).use { reader ->
             reader.lines().filter { it.isNotEmpty() }.toList()
         }
         ProcessGroovyMethods.closeStreams(process)
-        if (process.waitFor() != 0) throw IOException("Command exited with a non-0 status")
+        process.waitForOrThrow("Failed to run command")
         return out
     }
 

projects/core-api/build.gradle.kts

@@ -22,6 +22,6 @@ dependencies {
 }
 
 tasks.javadoc {
-    // Depend on
-    classpath += docApi
+    // Depend on the common API when publishing javadoc
+    classpath += docApi.get()
 }

projects/core/build.gradle.kts

@@ -32,7 +32,7 @@ tasks.processResources {
     inputs.property("gitHash", cct.gitHash)
 
     filesMatching("data/computercraft/lua/rom/help/credits.txt") {
-        expand(mapOf("gitContributors" to cct.gitContributors.get()))
+        expand(mapOf("gitContributors" to cct.gitContributors.map { it.joinToString("\n") }.get()))
     }
 }