Preparing repository for initial development

.gitignore

@@ -0,0 +1,4 @@
+target/
+project/target/
+project/project/
+modules/core/target/

.pre-commit-config.yaml

@@ -0,0 +1,16 @@
+---
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+      - id: fix-byte-order-marker
+      - id: mixed-line-ending
+        args: ['--fix=lf']
+        description: Enforces using only 'LF' line endings.
+      - id: trailing-whitespace
+  - repo: https://git.garrity.co/garrity-software/gs-pre-commit-scala
+    rev: v1.0.0
+    hooks:
+      - id: scalafmt

.scalafmt.conf

@@ -0,0 +1,72 @@
+// See: https://github.com/scalameta/scalafmt/tags for the latest tags.
+version = 3.7.17
+runner.dialect = scala3
+maxColumn = 80
+
+rewrite {
+    rules = [RedundantBraces, RedundantParens, Imports, SortModifiers]
+    imports.expand = true
+    imports.sort = scalastyle
+    redundantBraces.ifElseExpressions = true
+    redundantBraces.stringInterpolation = true
+}
+
+indent {
+    main = 2
+    callSite = 2
+    defnSite = 2
+    extendSite = 4
+    withSiteRelativeToExtends = 2
+    commaSiteRelativeToExtends = 2
+}
+
+align {
+    preset = more
+    openParenCallSite = false
+    openParenDefnSite = false
+}
+
+newlines {
+    implicitParamListModifierForce = [before,after]
+    topLevelStatementBlankLines = [
+        {
+            blanks = 1
+        }
+    ]
+    afterCurlyLambdaParams = squash
+}
+
+danglingParentheses {
+    defnSite = true
+    callSite = true
+    ctrlSite = true
+    exclude = []
+}
+
+verticalMultiline {
+    atDefnSite = true
+    arityThreshold = 2
+    newlineAfterOpenParen = true
+}
+
+comments {
+    wrap = standalone
+}
+
+docstrings {
+    style = "SpaceAsterisk"
+    oneline = unfold
+    wrap = yes
+    forceBlankLineBefore = true
+}
+
+project {
+  excludePaths = [
+    "glob:**target/**",
+    "glob:**.metals/**",
+    "glob:**.bloop/**",
+    "glob:**.bsp/**",
+    "glob:**metals.sbt",
+    "glob:**.git/**"
+  ]
+}

LICENSE

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+
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README.md

@@ -0,0 +1 @@
+# gs-semver-sbt-plugin

build.sbt

@@ -0,0 +1,32 @@
+ThisBuild / version      := "0.1.0-SNAPSHOT"
+ThisBuild / organization := "gs"
+
+ThisBuild / homepage := Some(
+  url("https://git.garrity.co/garrity-software/gs-semver-sbt-plugin")
+)
+
+ThisBuild / licenses := Seq(
+  "Apache-2.0" -> url("http://www.apache.org/license/LICENSE-2.0")
+)
+
+lazy val root = Project("gs-semver-sbt-plugin", file("."))
+  .enablePlugins(SbtPlugin)
+  .settings(
+    name := "gs-semver-sbt-plugin",
+    libraryDependencies ++= Seq(
+      "org.eclipse.jgit" % "org.eclipse.jgit" % "6.8.0.202311291450-r"
+    ),
+    pluginCrossBuild / sbtVersion := {
+      scalaBinaryVersion.value match {
+        // Minimum SBT version compatible with this plugin.
+        case "2.12" => "1.9.0"
+      }
+    },
+    scalacOptions := Seq(
+      "-unchecked",
+      "-deprecation",
+      "-feature",
+      "-encoding",
+      "utf8"
+    )
+  )

project/build.properties

@@ -0,0 +1 @@
+sbt.version=1.9.8

src/main/scala/gs/Git.scala

@@ -0,0 +1,38 @@
+package gs
+
+import java.io.File
+import org.eclipse.jgit.lib.Constants
+import org.eclipse.jgit.lib.Repository
+import org.eclipse.jgit.revwalk.RevWalk
+import org.eclipse.jgit.storage.file.FileRepositoryBuilder
+import scala.collection.JavaConverters._
+import scala.util.Try
+
+object Git {
+
+  private lazy val repo: Repository = {
+    val builder = new FileRepositoryBuilder()
+    builder.setGitDir(new File(".")).findGitDir().build()
+  }
+
+  def getLatestSemVer(): Option[SemVer] = {
+    val walk = new RevWalk(repo)
+    val result = repo
+      .getRefDatabase()
+      .getRefsByPrefix(Constants.R_TAGS)
+      .asScala
+      .map(ref => walk.parseTag(ref.getObjectId()))
+      .sortBy(_.getTaggerIdent().getWhenAsInstant())
+      .headOption
+      .map(_.getTagName())
+      .map(normalizeTagName)
+      .flatMap(SemVer.parse)
+
+    walk.dispose()
+    result
+  }
+
+  private def normalizeTagName(tag: String): String =
+    tag.trim().stripPrefix("v")
+
+}

src/main/scala/gs/InvalidSemVerException.scala

@@ -0,0 +1,8 @@
+package gs
+
+case class InvalidSemVerException(candidate: String) extends RuntimeException {
+
+  override def getMessage(): String =
+    s"The candidate SemVer '$candidate' is not valid."
+
+}

src/main/scala/gs/SemVer.scala

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+package gs
+
+import scala.util.matching.Regex
+
+case class SemVer(
+  major: Int,
+  minor: Int,
+  patch: Int
+) {
+
+  override def toString(): String =
+    s"$major.$minor.$patch"
+
+  def incrementPatch(): SemVer = copy(patch = this.patch + 1)
+}
+
+object SemVer {
+
+  val SemVerPattern: Regex =
+    "^(0|(?:[1-9][0-9]*))\\.(0|(?:[1-9][0-9]*))\\.(0|(?:[1-9][0-9]*))$".r
+
+  def parse(candidate: String): Option[SemVer] =
+    candidate match {
+      case SemVerPattern(major, minor, patch) =>
+        Some(SemVer(major.toInt, minor.toInt, patch.toInt))
+      case _ =>
+        None
+    }
+
+}

src/main/scala/gs/SemVerKeys.scala

@@ -0,0 +1,27 @@
+package gs
+
+import sbt._
+
+object SemVerKeys {
+
+  /** SBT Setting Key for the latest known project version.
+    *
+    * This value is automatically derived from Git by looking at the most recent
+    * tag. If the project does not yet have any tags, the value 0.1.0 is used.
+    */
+  lazy val latestVersion = settingKey[String](
+    "Latest Git-tagged project version, or 0.1.0 if no tags exist."
+  )
+
+  /** SBT Setting Key for the working project version - used if there are any
+    * non-committed changes.
+    *
+    * This value is automatically derived by taking the latest version, and
+    * either incrementing the revision by 1 or just using 0.1.0 if the project
+    * does not have any Git tags.
+    */
+  lazy val workingVersion = settingKey[String](
+    "Revision level increment of the latest version, or 0.1.0 if no tags exist."
+  )
+
+}

src/main/scala/gs/SemVerPlugin.scala

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+package gs
+
+import Keys._
+import sbt._
+
+object SemVerPlugin extends AutoPlugin {
+  override def trigger = allRequirements
+
+  val autoImport = SemVerKeys
+
+  import autoImport._
+
+  /* override lazy val globalSettings: Seq[Setting[_]] = Seq( helloGreeting :=
+   * "hi", )
+   *
+   * override lazy val projectSettings: Seq[Setting[_]] = Seq( hello := { val s
+   * = streams.value val g = helloGreeting.value s.log.info(g) } ) */
+}