Initial implementation of songbook toolset
Kotlin/JVM multi-module project for generating a scout songbook PDF from ChordPro-format text files. Includes ChordPro parser, layout engine with greedy spread packing for double-page songs, OpenPDF renderer, CLI (Clikt), Compose Desktop GUI, and 5 sample songs. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
shahondin1624
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package de.pfadfinder.songbook.app
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import de.pfadfinder.songbook.model.*
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import de.pfadfinder.songbook.parser.*
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import de.pfadfinder.songbook.layout.*
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import de.pfadfinder.songbook.renderer.pdf.*
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import mu.KotlinLogging
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import java.io.File
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import java.io.FileOutputStream
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private val logger = KotlinLogging.logger {}
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data class BuildResult(
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val success: Boolean,
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val outputFile: File? = null,
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val errors: List<ValidationError> = emptyList(),
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val songCount: Int = 0,
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val pageCount: Int = 0
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)
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class SongbookPipeline(private val projectDir: File) {
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fun build(): BuildResult {
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// 1. Parse config
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val configFile = File(projectDir, "songbook.yaml")
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if (!configFile.exists()) {
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return BuildResult(false, errors = listOf(ValidationError(configFile.name, null, "songbook.yaml not found")))
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}
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logger.info { "Parsing config: ${configFile.absolutePath}" }
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val config = ConfigParser.parse(configFile)
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// Validate config
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val configErrors = Validator.validateConfig(config)
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if (configErrors.isNotEmpty()) {
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return BuildResult(false, errors = configErrors)
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}
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// 2. Parse songs
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val songsDir = File(projectDir, config.songs.directory)
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if (!songsDir.exists() || !songsDir.isDirectory) {
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return BuildResult(false, errors = listOf(ValidationError(config.songs.directory, null, "Songs directory not found")))
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}
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val songFiles = songsDir.listFiles { f: File -> f.extension in listOf("chopro", "cho", "crd") }
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?.sortedBy { it.name }
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?: emptyList()
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if (songFiles.isEmpty()) {
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return BuildResult(false, errors = listOf(ValidationError(config.songs.directory, null, "No song files found")))
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}
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logger.info { "Found ${songFiles.size} song files" }
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val songs = mutableListOf<Song>()
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val allErrors = mutableListOf<ValidationError>()
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for (file in songFiles) {
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try {
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val song = ChordProParser.parseFile(file)
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val songErrors = Validator.validateSong(song, file.name)
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if (songErrors.isNotEmpty()) {
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allErrors.addAll(songErrors)
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} else {
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songs.add(song)
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}
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} catch (e: Exception) {
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allErrors.add(ValidationError(file.name, null, "Parse error: ${e.message}"))
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}
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}
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if (allErrors.isNotEmpty()) {
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return BuildResult(false, errors = allErrors)
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}
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// Sort songs
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val sortedSongs = when (config.songs.order) {
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"alphabetical" -> songs.sortedBy { it.title.lowercase() }
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else -> songs // manual order = file order
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}
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logger.info { "Parsed ${sortedSongs.size} songs" }
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// 3. Measure songs
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val fontMetrics = PdfFontMetrics()
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val measurementEngine = MeasurementEngine(fontMetrics, config)
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val measuredSongs = sortedSongs.map { measurementEngine.measure(it) }
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// 4. Generate TOC and paginate
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val tocGenerator = TocGenerator(config)
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val tocPages = tocGenerator.estimateTocPages(sortedSongs)
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val paginationEngine = PaginationEngine(config)
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val pages = paginationEngine.paginate(measuredSongs, tocPages)
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val tocEntries = tocGenerator.generate(pages, tocPages)
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val layoutResult = LayoutResult(
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tocPages = tocPages,
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pages = pages,
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tocEntries = tocEntries
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)
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logger.info { "Layout: ${tocPages} TOC pages, ${pages.size} content pages" }
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// 5. Render PDF
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val outputDir = File(projectDir, config.output.directory)
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outputDir.mkdirs()
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val outputFile = File(outputDir, config.output.filename)
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logger.info { "Rendering PDF: ${outputFile.absolutePath}" }
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val renderer = PdfBookRenderer()
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FileOutputStream(outputFile).use { fos ->
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renderer.render(layoutResult, config, fos)
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}
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logger.info { "Build complete: ${sortedSongs.size} songs, ${pages.size + tocPages} pages" }
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return BuildResult(
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success = true,
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outputFile = outputFile,
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songCount = sortedSongs.size,
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pageCount = pages.size + tocPages
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)
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}
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fun validate(): List<ValidationError> {
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val configFile = File(projectDir, "songbook.yaml")
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if (!configFile.exists()) {
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return listOf(ValidationError(configFile.name, null, "songbook.yaml not found"))
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}
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val config = ConfigParser.parse(configFile)
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val errors = mutableListOf<ValidationError>()
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errors.addAll(Validator.validateConfig(config))
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val songsDir = File(projectDir, config.songs.directory)
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if (!songsDir.exists()) {
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errors.add(ValidationError(config.songs.directory, null, "Songs directory not found"))
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return errors
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}
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val songFiles = songsDir.listFiles { f: File -> f.extension in listOf("chopro", "cho", "crd") }
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?.sortedBy { it.name }
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?: emptyList()
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for (file in songFiles) {
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try {
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val song = ChordProParser.parseFile(file)
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errors.addAll(Validator.validateSong(song, file.name))
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} catch (e: Exception) {
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errors.add(ValidationError(file.name, null, "Parse error: ${e.message}"))
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}
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}
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return errors
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}
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}
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@@ -0,0 +1,534 @@
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package de.pfadfinder.songbook.app
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import io.kotest.matchers.booleans.shouldBeFalse
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import io.kotest.matchers.booleans.shouldBeTrue
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import io.kotest.matchers.collections.shouldBeEmpty
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import io.kotest.matchers.collections.shouldHaveSize
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import io.kotest.matchers.collections.shouldNotBeEmpty
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import io.kotest.matchers.ints.shouldBeGreaterThan
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import io.kotest.matchers.nulls.shouldBeNull
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import io.kotest.matchers.nulls.shouldNotBeNull
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import io.kotest.matchers.shouldBe
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import io.kotest.matchers.string.shouldContain
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import java.io.File
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import kotlin.test.Test
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class SongbookPipelineTest {
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private fun createTempProject(): File {
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val dir = kotlin.io.path.createTempDirectory("songbook-test").toFile()
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dir.deleteOnExit()
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return dir
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}
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private fun writeConfig(projectDir: File, config: String = defaultConfig()) {
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File(projectDir, "songbook.yaml").writeText(config)
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}
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private fun defaultConfig(
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songsDir: String = "./songs",
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outputDir: String = "./output",
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outputFilename: String = "liederbuch.pdf",
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order: String = "alphabetical"
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): String = """
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book:
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title: "Test Liederbuch"
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format: "A5"
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songs:
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directory: "$songsDir"
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order: "$order"
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fonts:
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lyrics:
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family: "Helvetica"
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size: 10
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chords:
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family: "Helvetica"
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size: 9
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title:
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family: "Helvetica"
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size: 14
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metadata:
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family: "Helvetica"
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size: 8
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toc:
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family: "Helvetica"
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size: 9
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layout:
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margins:
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top: 15
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bottom: 15
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inner: 20
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outer: 12
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images:
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directory: "./images"
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output:
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directory: "$outputDir"
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filename: "$outputFilename"
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""".trimIndent()
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private fun writeSongFile(songsDir: File, filename: String, content: String) {
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songsDir.mkdirs()
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File(songsDir, filename).writeText(content)
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}
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private fun sampleSong(title: String = "Test Song"): String = """
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{title: $title}
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{start_of_verse}
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[Am]Hello [C]world
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This is a test
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{end_of_verse}
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""".trimIndent()
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// --- build() tests ---
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@Test
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fun `build returns error when songbook yaml is missing`() {
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val projectDir = createTempProject()
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try {
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeFalse()
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result.errors shouldHaveSize 1
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result.errors[0].message shouldContain "songbook.yaml not found"
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result.outputFile.shouldBeNull()
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build returns error when songs directory does not exist`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir, defaultConfig(songsDir = "./nonexistent"))
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeFalse()
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result.errors shouldHaveSize 1
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result.errors[0].message shouldContain "Songs directory not found"
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build returns error when songs directory is empty`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir)
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File(projectDir, "songs").mkdirs()
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeFalse()
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result.errors shouldHaveSize 1
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result.errors[0].message shouldContain "No song files found"
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build returns error for invalid config with zero margins`() {
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val projectDir = createTempProject()
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try {
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val config = """
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book:
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title: "Test"
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layout:
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margins:
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top: 0
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bottom: 15
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inner: 20
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outer: 12
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""".trimIndent()
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writeConfig(projectDir, config)
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeFalse()
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result.errors.shouldNotBeEmpty()
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result.errors.any { it.message.contains("margin", ignoreCase = true) }.shouldBeTrue()
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build returns error for song with missing title`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir)
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val songsDir = File(projectDir, "songs")
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writeSongFile(songsDir, "bad_song.chopro", """
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{start_of_verse}
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[Am]Hello world
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{end_of_verse}
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""".trimIndent())
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeFalse()
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result.errors.shouldNotBeEmpty()
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result.errors.any { it.message.contains("title", ignoreCase = true) }.shouldBeTrue()
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build returns error for song with no sections`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir)
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val songsDir = File(projectDir, "songs")
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writeSongFile(songsDir, "empty_song.chopro", "{title: Empty Song}")
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeFalse()
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result.errors.shouldNotBeEmpty()
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result.errors.any { it.message.contains("section", ignoreCase = true) }.shouldBeTrue()
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build succeeds with valid project`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir)
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val songsDir = File(projectDir, "songs")
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writeSongFile(songsDir, "song1.chopro", sampleSong("Alpha Song"))
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writeSongFile(songsDir, "song2.chopro", sampleSong("Beta Song"))
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeTrue()
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result.errors.shouldBeEmpty()
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result.outputFile.shouldNotBeNull()
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result.outputFile!!.exists().shouldBeTrue()
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result.songCount shouldBe 2
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result.pageCount shouldBeGreaterThan 0
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build creates output directory if it does not exist`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir, defaultConfig(outputDir = "./out/build"))
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val songsDir = File(projectDir, "songs")
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writeSongFile(songsDir, "song1.chopro", sampleSong())
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeTrue()
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File(projectDir, "out/build").exists().shouldBeTrue()
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result.outputFile!!.exists().shouldBeTrue()
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build with alphabetical order sorts songs by title`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir, defaultConfig(order = "alphabetical"))
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val songsDir = File(projectDir, "songs")
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writeSongFile(songsDir, "z_first.chopro", sampleSong("Zebra Song"))
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writeSongFile(songsDir, "a_second.chopro", sampleSong("Alpha Song"))
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeTrue()
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result.songCount shouldBe 2
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build with manual order preserves file order`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir, defaultConfig(order = "manual"))
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val songsDir = File(projectDir, "songs")
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writeSongFile(songsDir, "02_second.chopro", sampleSong("Second Song"))
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writeSongFile(songsDir, "01_first.chopro", sampleSong("First Song"))
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeTrue()
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result.songCount shouldBe 2
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build recognizes cho extension`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir)
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val songsDir = File(projectDir, "songs")
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writeSongFile(songsDir, "song1.cho", sampleSong("Cho Song"))
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeTrue()
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result.songCount shouldBe 1
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build recognizes crd extension`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir)
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val songsDir = File(projectDir, "songs")
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writeSongFile(songsDir, "song1.crd", sampleSong("Crd Song"))
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeTrue()
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result.songCount shouldBe 1
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build ignores non-song files in songs directory`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir)
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val songsDir = File(projectDir, "songs")
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writeSongFile(songsDir, "song1.chopro", sampleSong("Real Song"))
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writeSongFile(songsDir, "readme.txt", "Not a song")
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writeSongFile(songsDir, "notes.md", "# Notes")
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeTrue()
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result.songCount shouldBe 1
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} finally {
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projectDir.deleteRecursively()
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}
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}
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@Test
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fun `build output file has correct name`() {
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val projectDir = createTempProject()
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try {
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writeConfig(projectDir, defaultConfig(outputFilename = "my-book.pdf"))
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val songsDir = File(projectDir, "songs")
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writeSongFile(songsDir, "song1.chopro", sampleSong())
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val pipeline = SongbookPipeline(projectDir)
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val result = pipeline.build()
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result.success.shouldBeTrue()
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||||
result.outputFile!!.name shouldBe "my-book.pdf"
|
||||
} finally {
|
||||
projectDir.deleteRecursively()
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
fun `build pageCount includes toc pages`() {
|
||||
val projectDir = createTempProject()
|
||||
try {
|
||||
writeConfig(projectDir)
|
||||
val songsDir = File(projectDir, "songs")
|
||||
writeSongFile(songsDir, "song1.chopro", sampleSong())
|
||||
|
||||
val pipeline = SongbookPipeline(projectDir)
|
||||
val result = pipeline.build()
|
||||
|
||||
result.success.shouldBeTrue()
|
||||
// At least 1 content page + TOC pages (minimum 2 for even count)
|
||||
result.pageCount shouldBeGreaterThan 1
|
||||
} finally {
|
||||
projectDir.deleteRecursively()
|
||||
}
|
||||
}
|
||||
|
||||
// --- validate() tests ---
|
||||
|
||||
@Test
|
||||
fun `validate returns error when songbook yaml is missing`() {
|
||||
val projectDir = createTempProject()
|
||||
try {
|
||||
val pipeline = SongbookPipeline(projectDir)
|
||||
val errors = pipeline.validate()
|
||||
|
||||
errors shouldHaveSize 1
|
||||
errors[0].message shouldContain "songbook.yaml not found"
|
||||
} finally {
|
||||
projectDir.deleteRecursively()
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
fun `validate returns error when songs directory does not exist`() {
|
||||
val projectDir = createTempProject()
|
||||
try {
|
||||
writeConfig(projectDir, defaultConfig(songsDir = "./nonexistent"))
|
||||
val pipeline = SongbookPipeline(projectDir)
|
||||
val errors = pipeline.validate()
|
||||
|
||||
errors.shouldNotBeEmpty()
|
||||
errors.any { it.message.contains("Songs directory not found") }.shouldBeTrue()
|
||||
} finally {
|
||||
projectDir.deleteRecursively()
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
fun `validate returns empty list for valid project`() {
|
||||
val projectDir = createTempProject()
|
||||
try {
|
||||
writeConfig(projectDir)
|
||||
val songsDir = File(projectDir, "songs")
|
||||
writeSongFile(songsDir, "song1.chopro", sampleSong())
|
||||
|
||||
val pipeline = SongbookPipeline(projectDir)
|
||||
val errors = pipeline.validate()
|
||||
|
||||
errors.shouldBeEmpty()
|
||||
} finally {
|
||||
projectDir.deleteRecursively()
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
fun `validate reports config errors`() {
|
||||
val projectDir = createTempProject()
|
||||
try {
|
||||
val config = """
|
||||
layout:
|
||||
margins:
|
||||
top: 0
|
||||
bottom: 0
|
||||
inner: 0
|
||||
outer: 0
|
||||
""".trimIndent()
|
||||
writeConfig(projectDir, config)
|
||||
// Still need songs dir to exist for full validate
|
||||
File(projectDir, "./songs").mkdirs()
|
||||
|
||||
val pipeline = SongbookPipeline(projectDir)
|
||||
val errors = pipeline.validate()
|
||||
|
||||
errors shouldHaveSize 4
|
||||
errors.all { it.message.contains("margin", ignoreCase = true) }.shouldBeTrue()
|
||||
} finally {
|
||||
projectDir.deleteRecursively()
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
fun `validate reports song validation errors`() {
|
||||
val projectDir = createTempProject()
|
||||
try {
|
||||
writeConfig(projectDir)
|
||||
val songsDir = File(projectDir, "songs")
|
||||
writeSongFile(songsDir, "bad_song.chopro", "{title: }")
|
||||
|
||||
val pipeline = SongbookPipeline(projectDir)
|
||||
val errors = pipeline.validate()
|
||||
|
||||
errors.shouldNotBeEmpty()
|
||||
} finally {
|
||||
projectDir.deleteRecursively()
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
fun `validate reports errors for multiple invalid songs`() {
|
||||
val projectDir = createTempProject()
|
||||
try {
|
||||
writeConfig(projectDir)
|
||||
val songsDir = File(projectDir, "songs")
|
||||
writeSongFile(songsDir, "bad1.chopro", "{title: Good Title}") // no sections
|
||||
writeSongFile(songsDir, "bad2.chopro", "{title: Another Title}") // no sections
|
||||
|
||||
val pipeline = SongbookPipeline(projectDir)
|
||||
val errors = pipeline.validate()
|
||||
|
||||
errors.shouldNotBeEmpty()
|
||||
errors.size shouldBeGreaterThan 1
|
||||
} finally {
|
||||
projectDir.deleteRecursively()
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
fun `validate with empty songs directory returns no song errors`() {
|
||||
val projectDir = createTempProject()
|
||||
try {
|
||||
writeConfig(projectDir)
|
||||
File(projectDir, "songs").mkdirs()
|
||||
|
||||
val pipeline = SongbookPipeline(projectDir)
|
||||
val errors = pipeline.validate()
|
||||
|
||||
// No errors because there are no song files to validate
|
||||
errors.shouldBeEmpty()
|
||||
} finally {
|
||||
projectDir.deleteRecursively()
|
||||
}
|
||||
}
|
||||
|
||||
// --- BuildResult data class tests ---
|
||||
|
||||
@Test
|
||||
fun `BuildResult defaults are correct`() {
|
||||
val result = BuildResult(success = false)
|
||||
|
||||
result.success.shouldBeFalse()
|
||||
result.outputFile.shouldBeNull()
|
||||
result.errors.shouldBeEmpty()
|
||||
result.songCount shouldBe 0
|
||||
result.pageCount shouldBe 0
|
||||
}
|
||||
|
||||
@Test
|
||||
fun `BuildResult with all fields set`() {
|
||||
val file = File("/tmp/test.pdf")
|
||||
val errors = listOf(de.pfadfinder.songbook.parser.ValidationError("test", 1, "error"))
|
||||
val result = BuildResult(
|
||||
success = true,
|
||||
outputFile = file,
|
||||
errors = errors,
|
||||
songCount = 5,
|
||||
pageCount = 10
|
||||
)
|
||||
|
||||
result.success.shouldBeTrue()
|
||||
result.outputFile shouldBe file
|
||||
result.errors shouldHaveSize 1
|
||||
result.songCount shouldBe 5
|
||||
result.pageCount shouldBe 10
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user