diff --git a/src/main/kotlin/alfred/web/core/AlfredHome.kt b/src/main/kotlin/alfred/web/core/AlfredHome.kt
new file mode 100644
index 0000000..6b77174
--- /dev/null
+++ b/src/main/kotlin/alfred/web/core/AlfredHome.kt
@@ -0,0 +1,22 @@
+package alfred.web.core
+
+import alfred.web.core.build.BuildId
+import org.springframework.beans.factory.annotation.Value
+import org.springframework.stereotype.Service
+import java.nio.file.Paths
+
+@Service
+class AlfredHome(
+    @Value("\${ALFRED_HOME}")
+    private val home: String,
+) {
+
+    val homePath = Paths.get(home)
+
+    fun logsDir() =
+        homePath.resolve("logs")
+
+    fun buildConfig(buildId: BuildId) =
+        homePath.resolve("builds/${buildId}.properties")
+
+}
diff --git a/src/main/kotlin/alfred/web/core/build/Builds.kt b/src/main/kotlin/alfred/web/core/build/Builds.kt
index f30a928..082eedb 100644
--- a/src/main/kotlin/alfred/web/core/build/Builds.kt
+++ b/src/main/kotlin/alfred/web/core/build/Builds.kt
@@ -1,32 +1,30 @@
 package alfred.web.core.build
 
+import alfred.web.core.AlfredHome
 import com.fasterxml.jackson.annotation.JsonIgnore
 import org.slf4j.Logger
 import org.slf4j.LoggerFactory
-import org.springframework.beans.factory.annotation.Value
 import org.springframework.http.HttpStatus
 import org.springframework.stereotype.Service
 import org.springframework.web.bind.annotation.ResponseStatus
 import java.nio.file.Files.createFile
-import java.nio.file.Paths
 import java.time.LocalDateTime
 import java.time.format.DateTimeFormatter
 import java.util.*
 
 @Service
 class Builds(
-    @Value("\${ALFRED_HOME}")
-    private val home: String
+    val alfredHome: AlfredHome
 ) {
 
     private val logger: Logger = LoggerFactory.getLogger(this::class.java)
 
     init {
-        logger.info("ALFRED_HOME is $home")
+        logger.info("ALFRED_HOME is ${alfredHome.homePath.toFile().absolutePath}")
     }
 
     fun buildConfig(build: BuildId): BuildConfig {
-        val path = Paths.get(home, "builds", "$build.properties")
+        val path = alfredHome.buildConfig(build)
 
         if (!path.toFile().exists()) {
             throw UnknownBuild(build)
@@ -47,10 +45,11 @@ class Builds(
         val nowStr = LocalDateTime.now().format(DateTimeFormatter.ISO_DATE_TIME)
         val fileName = "$build.$nowStr.log"
 
-        val path = Paths.get(home, "logs", fileName)
-        path.toFile().parentFile.mkdirs()
+        val logsDir = alfredHome.logsDir()
+        logsDir.toFile().mkdir()
 
-        return LogFile(createFile(path).toFile())
+        val logFilePath = logsDir.resolve(fileName)
+        return LogFile(createFile(logFilePath).toFile())
     }
 
 }
diff --git a/src/main/kotlin/alfred/web/core/build/LogFile.kt b/src/main/kotlin/alfred/web/core/build/LogFile.kt
index b970826..65ac81d 100644
--- a/src/main/kotlin/alfred/web/core/build/LogFile.kt
+++ b/src/main/kotlin/alfred/web/core/build/LogFile.kt
@@ -17,10 +17,9 @@ class LogFile(
 
     val logger: Logger = LoggerFactory.getLogger(this::class.java)
 
-    fun header(buildId: BuildId, rev: String?, workspace: Path) {
+    fun header(buildId: BuildId, rev: String?) {
         append("At your service.")
         append("Build $buildId, rev [${rev ?: "-none-"}] started at ${ZonedDateTime.now()}")
-        append("Workspace directory is: ${workspace.toFile().absolutePath}")
         append("------------------------------------------------------------")
     }
 
diff --git a/src/main/kotlin/alfred/web/core/build/Workspaces.kt b/src/main/kotlin/alfred/web/core/build/Workspaces.kt
index b8cac99..cf44402 100644
--- a/src/main/kotlin/alfred/web/core/build/Workspaces.kt
+++ b/src/main/kotlin/alfred/web/core/build/Workspaces.kt
@@ -16,7 +16,7 @@ class Workspaces {
         try {
             block(wsDir)
         } finally {
-            wsDir.toFile().deleteRecursively()
+            cleanUp(wsDir)
         }
     }
 
diff --git a/src/main/kotlin/alfred/web/core/process/Git.kt b/src/main/kotlin/alfred/web/core/process/Git.kt
new file mode 100644
index 0000000..19e5b37
--- /dev/null
+++ b/src/main/kotlin/alfred/web/core/process/Git.kt
@@ -0,0 +1,64 @@
+package alfred.web.core.process
+
+import alfred.web.core.Handle
+import alfred.web.core.Handles
+import alfred.web.core.build.BuildContext
+import alfred.web.core.build.BuildId
+import alfred.web.core.build.Workspace
+import org.springframework.stereotype.Service
+import java.util.concurrent.TimeUnit
+
+@Service
+class Git(
+    val processes: Processes,
+    val handles: Handles,
+) {
+
+    fun clone(ctx: BuildContext, ws: Workspace) {
+        ctx.log("cloning ${ctx.config.gitRepo} into $ws")
+
+        val proc = processes.builder(ctx.config, ctx.logFile, "")
+            .command("git", "clone", ctx.config.gitRepo, ".")
+            .directory(ws.toFile())
+            .start()
+        handles.add(Handle(proc.toHandle(), ctx.buildId))
+
+        val cloneSuccess = proc.waitFor(ctx.config.gitCloneTimeout, TimeUnit.SECONDS)
+        if (!cloneSuccess) {
+            throw FailedToClone(ctx.buildId, ctx.config.gitRepo ?: "[no repo configured]")
+        }
+    }
+
+    fun checkout(ctx: BuildContext, ws: Workspace) {
+        ctx.log("checkout rev ${ctx.rev}")
+
+        val proc = processes.builder(ctx.config, ctx.logFile, "")
+            .command("git", "checkout", ctx.rev)
+            .directory(ws.toFile())
+            .start()
+        handles.add(Handle(proc.toHandle(), ctx.buildId))
+
+        val checkoutSuccess = proc.waitFor(ctx.config.gitCloneTimeout, TimeUnit.SECONDS)
+        if (!checkoutSuccess) {
+            throw FailedToCheckout(ctx.buildId, ctx.config.gitRepo!!, ctx.rev)
+        }
+    }
+
+    sealed class GitException(msg: String): Exception(msg)
+
+    private class FailedToClone(
+        buildId: BuildId,
+        gitRepo: String
+    ) : GitException(
+        "failed to clone $gitRepo for build id $buildId"
+    )
+
+    private class FailedToCheckout(
+        buildId: BuildId,
+        gitRepo: String,
+        rev: String
+    ) : GitException(
+        "failed to checkout revision $rev on repo $gitRepo for build id $buildId"
+    )
+
+}
diff --git a/src/main/kotlin/alfred/web/core/process/Script.kt b/src/main/kotlin/alfred/web/core/process/Script.kt
new file mode 100644
index 0000000..3ec9497
--- /dev/null
+++ b/src/main/kotlin/alfred/web/core/process/Script.kt
@@ -0,0 +1,34 @@
+package alfred.web.core.process
+
+import alfred.web.core.Handle
+import alfred.web.core.Handles
+import alfred.web.core.build.BuildContext
+import alfred.web.core.build.Workspace
+import org.springframework.stereotype.Service
+import java.io.File
+
+@Service
+class Script(
+    val handles: Handles,
+    val processes: Processes
+) {
+
+    fun execute(ctx: BuildContext, ws: Workspace, scriptFile: File): Process {
+        ctx.log("Running build file: ${scriptFile.name}")
+
+        val scriptProcess = processes.builder(ctx.config, ctx.logFile, ctx.rev)
+            .command(scriptFile.absolutePath)
+            .directory(ws.toFile())
+            .start()
+        handles.add(Handle(scriptProcess.toHandle(), ctx.buildId))
+
+        return scriptProcess
+    }
+
+    fun exists(scriptFile: File) = scriptFile.exists()
+
+    fun onExit(process: Process, block: () -> Unit) {
+        process.onExit().whenComplete { _, _ -> block() }
+    }
+
+}
diff --git a/src/main/kotlin/alfred/web/core/runner/GitRunner.kt b/src/main/kotlin/alfred/web/core/runner/GitRunner.kt
index 8d806a3..70ed901 100644
--- a/src/main/kotlin/alfred/web/core/runner/GitRunner.kt
+++ b/src/main/kotlin/alfred/web/core/runner/GitRunner.kt
@@ -1,7 +1,5 @@
 package alfred.web.core.runner
 
-import alfred.web.core.Handle
-import alfred.web.core.Handles
 import alfred.web.core.build.BuildContext
 import alfred.web.core.build.BuildId
 import alfred.web.core.build.Builds
@@ -9,22 +7,23 @@ import alfred.web.core.build.ProcessInfo
 import alfred.web.core.build.Workspace
 import alfred.web.core.build.Workspaces
 import alfred.web.core.event.BuildFinished
+import alfred.web.core.process.Git
 import alfred.web.core.process.Processes
+import alfred.web.core.process.Script
 import org.slf4j.Logger
 import org.slf4j.LoggerFactory
 import org.springframework.context.ApplicationEventPublisher
 import org.springframework.stereotype.Service
-import java.util.concurrent.TimeUnit
 import kotlin.collections.forEach
-import kotlin.jvm.java
 
 @Service
 class GitRunner(
     val builds: Builds,
-    val handles: Handles,
     val processes: Processes,
     val workspaces: Workspaces,
-    val eventPublisher: ApplicationEventPublisher
+    val eventPublisher: ApplicationEventPublisher,
+    val git: Git,
+    val script: Script
 ) {
 
     val scriptsDir = ".alfred"
@@ -36,7 +35,7 @@ class GitRunner(
         val logFile = builds.createLogFile(buildId)
 
         logger.info("preparing process for build $buildId")
-        logger.info("log file: $logFile")
+        logger.info("log file: ${logFile.backingFile.absolutePath}")
 
         val ctx = BuildContext(
             buildId = buildId,
@@ -46,74 +45,37 @@ class GitRunner(
         )
 
         processes.startThread {
-            workspaces.withWorkspace(ctx) { wsPath ->
-                logFile.header(buildId, rev, wsPath)
+            logFile.header(buildId, rev)
 
-                clone(ctx, wsPath)
-                checkout(ctx, wsPath)
-                execScripts(ctx, wsPath)
+            workspaces.withWorkspace(ctx) { ws ->
 
-                logFile.footer()
+                git.clone(ctx, ws)
+                git.checkout(ctx, ws)
+                execScripts(ctx, ws)
 
-                eventPublisher.publishEvent(BuildFinished(ctx))
+                logFile.footer()
             }
-        }
 
-        return ProcessInfo(-1, logFile)
-    }
-
-    private fun clone(ctx: BuildContext, ws: Workspace) {
-        ctx.log("cloning ${ctx.config.gitRepo} into $ws")
-
-        val proc = processes.builder(ctx.config, ctx.logFile, "")
-            .command("git", "clone", ctx.config.gitRepo, ".")
-            .directory(ws.toFile())
-            .start()
-        handles.add(Handle(proc.toHandle(), ctx.buildId))
-
-        val cloneSuccess = proc.waitFor(ctx.config.gitCloneTimeout, TimeUnit.SECONDS)
-        if (!cloneSuccess) {
-            throw FailedToClone(ctx.buildId, ctx.config.gitRepo ?: "[no repo configured]")
+            eventPublisher.publishEvent(BuildFinished(ctx))
         }
-    }
 
-    private fun checkout(ctx: BuildContext, ws: Workspace) {
-        ctx.log("checkout rev ${ctx.rev}")
-
-        val proc = processes.builder(ctx.config, ctx.logFile, "")
-            .command("git", "checkout", ctx.rev)
-            .directory(ws.toFile())
-            .start()
-        handles.add(Handle(proc.toHandle(), ctx.buildId))
-
-        val checkoutSuccess = proc.waitFor(ctx.config.gitCloneTimeout, TimeUnit.SECONDS)
-        if (!checkoutSuccess) {
-            throw FailedToCheckout(ctx.buildId, ctx.config.gitRepo!!, ctx.rev)
-        }
+        return ProcessInfo(-1, logFile)
     }
 
     private fun execScripts(ctx: BuildContext, ws: Workspace) {
         ctx.log("looking for scripts $scriptFiles in $scriptsDir/")
 
-        scriptFiles.forEach { script ->
-            val scriptFile = shFile(ws, script)
-            if (scriptFile.exists()) {
-                ctx.log("found script $script, running it")
+        scriptFiles.forEach { scriptName ->
+            val scriptFile = shFile(ws, scriptName)
+            if (script.exists(scriptFile)) {
+                ctx.log("found script $scriptName, running it")
 
-                ctx.log("Running build file: $script")
+                val proc = script.execute(ctx, ws, scriptFile)
+                proc.waitFor()
 
-                val scriptProcess = processes.builder(ctx.config, ctx.logFile, ctx.rev)
-                    .command(scriptFile.absolutePath)
-                    .directory(ws.toFile())
-                    .start()
-                handles.add(Handle(scriptProcess.toHandle(), ctx.buildId))
-
-                val ret = scriptProcess.waitFor()
-                ctx.log("script $script returned $ret")
-
-                ctx.log("$script returned $ret")
+                ctx.log("$scriptName returned ${proc.exitValue()}")
             } else {
-                ctx.log("Build file $scriptsDir/$script not found")
+                ctx.log("Build file $scriptsDir/$scriptName not found")
             }
         }
     }
@@ -124,19 +86,3 @@ class GitRunner(
     val logger: Logger = LoggerFactory.getLogger(this::class.java)
 
 }
-
-
-class FailedToClone(
-    buildId: BuildId,
-    gitRepo: String
-) : RuntimeException(
-    "failed to clone $gitRepo for build id $buildId"
-)
-
-class FailedToCheckout(
-    buildId: BuildId,
-    gitRepo: String,
-    rev: String
-) : RuntimeException(
-    "failed to checkout revision $rev on repo $gitRepo for build id $buildId"
-)
diff --git a/src/main/kotlin/alfred/web/core/runner/ScriptRunner.kt b/src/main/kotlin/alfred/web/core/runner/ScriptRunner.kt
index 4561643..8d2beba 100644
--- a/src/main/kotlin/alfred/web/core/runner/ScriptRunner.kt
+++ b/src/main/kotlin/alfred/web/core/runner/ScriptRunner.kt
@@ -1,22 +1,20 @@
 package alfred.web.core.runner
 
-import alfred.web.core.Handle
-import alfred.web.core.Handles
 import alfred.web.core.build.*
 import alfred.web.core.event.BuildFinished
-import alfred.web.core.process.Processes
+import alfred.web.core.process.Script
 import org.slf4j.Logger
 import org.slf4j.LoggerFactory
 import org.springframework.context.ApplicationEventPublisher
 import org.springframework.stereotype.Service
+import java.io.File
 
 @Service
 class ScriptRunner(
     val builds: Builds,
-    val handles: Handles,
-    val processes: Processes,
     val workspaces: Workspaces,
-    val eventPublisher: ApplicationEventPublisher
+    val eventPublisher: ApplicationEventPublisher,
+    val script: Script
 ) {
 
     fun run(buildId: BuildId, rev: String?): ProcessInfo {
@@ -41,27 +39,27 @@ class ScriptRunner(
         return ProcessInfo(pid = pid, logFile = logFile)
     }
 
-    private fun runScript(
-        ctx: BuildContext
-    ): Process {
+    private fun runScript(ctx: BuildContext): Process {
+        ctx.logFile.header(ctx.buildId, ctx.rev)
+
         val wsDir = workspaces.prepare(ctx)
-        ctx.logFile.header(ctx.buildId, ctx.rev, wsDir)
 
         ctx.log("running ${ctx.config.script} in ${wsDir.toAbsolutePath()}")
-        val process = processes.builder(ctx)
-            .command(ctx.config.script)
-            .directory(wsDir.toFile())
-            .start()
-        handles.add(Handle(process.toHandle(), ctx.buildId))
 
-        process.onExit().whenComplete { _, _ ->
+        val proc = script.execute(
+            ctx,
+            wsDir,
+            File(ctx.config.script!!)
+        )
+
+        script.onExit(proc) {
             ctx.logFile.footer()
             workspaces.cleanUp(wsDir)
 
             eventPublisher.publishEvent(BuildFinished(ctx))
         }
 
-        return process
+        return proc
     }
 
     val logger: Logger = LoggerFactory.getLogger(this::class.java)
diff --git a/src/test/kotlin/alfred/web/core/build/BuildsTest.kt b/src/test/kotlin/alfred/web/core/build/BuildsTest.kt
index 44cd5e1..b178680 100644
--- a/src/test/kotlin/alfred/web/core/build/BuildsTest.kt
+++ b/src/test/kotlin/alfred/web/core/build/BuildsTest.kt
@@ -1,5 +1,6 @@
 package alfred.web.core.build
 
+import alfred.web.core.AlfredHome
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.assertThrows
 import java.nio.file.Paths
@@ -44,10 +45,12 @@ class BuildsTest {
 
     private fun builds() =
         Builds(
-            Paths.get("")
-                .toAbsolutePath()
-                .resolve("src/test/resources/home-1")
-                .toString()
+            AlfredHome(
+                Paths.get("")
+                    .toAbsolutePath()
+                    .resolve("src/test/resources/home-1")
+                    .toString()
+            )
         )
 
 }
diff --git a/src/test/kotlin/alfred/web/core/commonMocks.kt b/src/test/kotlin/alfred/web/core/commonMocks.kt
new file mode 100644
index 0000000..cf50193
--- /dev/null
+++ b/src/test/kotlin/alfred/web/core/commonMocks.kt
@@ -0,0 +1,12 @@
+package alfred.web.core
+
+import io.mockk.justRun
+import io.mockk.mockk
+import org.springframework.context.ApplicationEventPublisher
+import kotlin.reflect.KClass
+
+fun <T : Any> eventPublisher(eventType: KClass<T>): ApplicationEventPublisher {
+    val eventPublisher = mockk<ApplicationEventPublisher>()
+    justRun { eventPublisher.publishEvent(any(eventType)) }
+    return eventPublisher
+}
diff --git a/src/test/kotlin/alfred/web/core/runner/GitRunnerTest.kt b/src/test/kotlin/alfred/web/core/runner/GitRunnerTest.kt
new file mode 100644
index 0000000..2ce3c3a
--- /dev/null
+++ b/src/test/kotlin/alfred/web/core/runner/GitRunnerTest.kt
@@ -0,0 +1,73 @@
+package alfred.web.core.runner
+
+import alfred.web.core.AlfredHome
+import alfred.web.core.build.Builds
+import alfred.web.core.build.Workspaces
+import alfred.web.core.event.BuildFinished
+import alfred.web.core.eventPublisher
+import alfred.web.core.process.Git
+import alfred.web.core.process.ProcessEnvironment
+import alfred.web.core.process.Processes
+import alfred.web.core.process.Script
+import io.mockk.every
+import io.mockk.justRun
+import io.mockk.mockk
+import io.mockk.spyk
+import io.mockk.verify
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.io.TempDir
+import java.nio.file.Path
+import java.nio.file.Paths
+
+class GitRunnerTest {
+
+    @Test
+    fun runs(@TempDir logsDir: Path) {
+        // Given
+        val eventPublisher = eventPublisher(BuildFinished::class)
+
+        val git = mockk<Git>()
+        justRun { git.clone(any(), any()) }
+        justRun { git.checkout(any(), any()) }
+
+        val script = mockk<Script>()
+        every { script.execute(any(), any(), any()) } returns (mockk<Process>(relaxed = true))
+        every { script.exists(any()) } returns (true)
+
+        val workspacesSpy = spyk(Workspaces())
+
+        val homeDir = Paths.get("").toAbsolutePath().resolve("src/test/resources/home-1")
+        val home = spyk(AlfredHome(homeDir.toFile().absolutePath))
+        every { home.logsDir() } returns logsDir
+
+        val runner = GitRunner(
+            builds = Builds(home),
+            processes = Processes(ProcessEnvironment()),
+            workspaces = workspacesSpy,
+            eventPublisher = eventPublisher,
+            git = git,
+            script = script
+        )
+
+        // When
+        runner.run(
+            buildId = "simple-git",
+            rev = "master"
+        )
+
+        // Then
+        verify(timeout = 1_000, exactly = 1) {
+            git.clone(any(), any())
+            git.checkout(any(), any())
+
+            listOf("pre.sh", "job.sh", "post.sh").forEach { scriptName ->
+                script.exists(match { it.name == scriptName })
+                script.execute(any(), any(), match { it.name == scriptName })
+            }
+
+            eventPublisher.publishEvent(any(BuildFinished::class))
+            workspacesSpy.cleanUp(any())
+        }
+    }
+
+}
diff --git a/src/test/kotlin/alfred/web/core/runner/ScriptRunnerTest.kt b/src/test/kotlin/alfred/web/core/runner/ScriptRunnerTest.kt
new file mode 100644
index 0000000..e0be6e8
--- /dev/null
+++ b/src/test/kotlin/alfred/web/core/runner/ScriptRunnerTest.kt
@@ -0,0 +1,65 @@
+package alfred.web.core.runner
+
+import alfred.web.core.AlfredHome
+import alfred.web.core.build.Builds
+import alfred.web.core.build.Workspaces
+import alfred.web.core.event.BuildFinished
+import alfred.web.core.eventPublisher
+import alfred.web.core.process.Script
+import io.mockk.every
+import io.mockk.mockk
+import io.mockk.slot
+import io.mockk.spyk
+import io.mockk.verify
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.io.TempDir
+import org.springframework.test.web.client.ExpectedCount.once
+import java.nio.file.Path
+import java.nio.file.Paths
+
+
+class ScriptRunnerTest {
+
+    @Test
+    fun runs(@TempDir logDir: Path) {
+        // Given
+        val home = spyk(
+            AlfredHome(
+                Paths.get("").toAbsolutePath().resolve("src/test/resources/home-1").toString()
+            )
+        )
+        every { home.logsDir() } returns logDir
+
+        val eventPublisher = eventPublisher(BuildFinished::class)
+
+        val script = mockk<Script>()
+        every { script.execute(any(), any(), any()) } returns mockk<Process>(relaxed = true)
+        val onExit = slot<() -> Unit>()
+        every { script.onExit(any(), capture(onExit)) } answers { onExit.captured() }
+
+        val workspaces = spyk(Workspaces())
+
+        val runner = ScriptRunner(
+            builds = Builds(home),
+            workspaces = workspaces,
+            eventPublisher = eventPublisher,
+            script = script
+        )
+
+        // When
+        runner.run(
+            buildId = "simple-script",
+            rev = null
+        )
+
+        // Then
+        verify(timeout = 1_000, exactly = 1) {
+            script.execute(any(), any(), match { it.name == "some-script" })
+
+            workspaces.cleanUp(any())
+
+            eventPublisher.publishEvent(any(BuildFinished::class))
+        }
+    }
+
+}
diff --git a/src/test/resources/home-1/builds/simple-git.properties b/src/test/resources/home-1/builds/simple-git.properties
new file mode 100644
index 0000000..7c281e5
--- /dev/null
+++ b/src/test/resources/home-1/builds/simple-git.properties
@@ -0,0 +1,5 @@
+user=alfred
+workspace=/tmp
+apikey=Mellon
+
+git.repo.url=some.url
diff --git a/src/test/resources/home-1/builds/simple-script.properties b/src/test/resources/home-1/builds/simple-script.properties
new file mode 100644
index 0000000..5ab6c20
--- /dev/null
+++ b/src/test/resources/home-1/builds/simple-script.properties
@@ -0,0 +1,5 @@
+user=alfred
+workspace=/tmp
+apikey=Mellon
+
+script=some-script