Separate queue wait from build duration

BuildResult gains runningSince, set when a build leaves the queue; the
recorded duration now measures pure build time from that point, so build
runtimes can be tracked without queue wait. A build cancelled while still
queued records neither. The UI shows the live wait time in italics while
pending and switches to the real build time once the build runs; the Gitea
"after mm:ss" descriptions now also report pure build time.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/main/kotlin/de/hoennig/gittally/build/BuildExecutor.kt

@@ -120,6 +120,7 @@ class BuildExecutor(
                 return
             }
             build.running = true
+            build.runningBuild.runningSince = Instant.now()
             transition(build, BuildStatus.RUNNING, duration = null)
             val preparedWorkspace =
                 workspaces.prepare(
@@ -140,7 +141,8 @@ class BuildExecutor(
             log.error("build of branch {} crashed", build.runningBuild.branch, e)
             appendToLiveLog(build, "\nbuild crashed: ${e.message}\n")
         } finally {
-            val duration = Duration.between(build.runningBuild.startedAt, Instant.now())
+            // pure build time, without the queue wait; null when the build never started executing
+            val duration = build.runningBuild.runningSince?.let { Duration.between(it, Instant.now()) }
             val result = transition(build, finalStatus, duration)
             try {
                 artifactStore.persist(result, build.runningBuild.stagingDir, workspace)
@@ -277,12 +279,17 @@ class BuildExecutor(
         val runningBuild = build.runningBuild
         val updated =
             repository.updateByArtifactKey(runningBuild.artifactKey) {
-                it.copy(status = status, duration = duration ?: it.duration)
+                it.copy(
+                    status = status,
+                    runningSince = runningBuild.runningSince ?: it.runningSince,
+                    duration = duration ?: it.duration,
+                )
             } ?: BuildResult(
                 branch = runningBuild.branch,
                 commit = runningBuild.commit,
                 status = status,
                 startedAt = runningBuild.startedAt,
+                runningSince = runningBuild.runningSince,
                 duration = duration,
                 artifactKey = runningBuild.artifactKey,
             ).also { repository.append(it) }

src/main/kotlin/de/hoennig/gittally/build/BuildResult.kt

@@ -7,7 +7,11 @@ data class BuildResult(
     val branch: String,
     val commit: String,
     val status: BuildStatus,
+    /** When the build was accepted (enqueued); the time until [runningSince] is queue wait. */
     val startedAt: Instant,
+    /** When the build actually started executing; null while queued or when cancelled in the queue. */
+    val runningSince: Instant? = null,
+    /** Pure build execution time (from [runningSince]), without the queue wait. */
     val duration: Duration? = null,
     val artifactKey: String,
 )

src/main/kotlin/de/hoennig/gittally/build/RunningBuild.kt

@@ -13,7 +13,11 @@ data class RunningBuild(
     val stagingDir: Path,
     /** Combined stdout+stderr log, written live while the build runs. */
     val liveLogFile: Path,
-)
+) {
+    /** Set by the executor when the build leaves the queue and starts executing. */
+    @Volatile
+    var runningSince: Instant? = null
+}
 
 /** Published via Spring's `ApplicationEventPublisher` on every persisted status transition. */
 data class BuildStatusChangedEvent(

src/main/kotlin/de/hoennig/gittally/server/ApiDtos.kt

@@ -13,6 +13,8 @@ data class BuildResultDto(
     val commit: String,
     val status: String,
     val startedAt: Instant,
+    /** When the build left the queue; the UI derives the live build time from this, the wait time from [startedAt]. */
+    val runningSince: Instant? = null,
     val durationSeconds: Long?,
     val artifactKey: String,
 ) {
@@ -23,6 +25,7 @@ data class BuildResultDto(
                 commit = result.commit,
                 status = result.status.jsonName,
                 startedAt = result.startedAt,
+                runningSince = result.runningSince,
                 durationSeconds = result.duration?.seconds,
                 artifactKey = result.artifactKey,
             )
@@ -40,6 +43,7 @@ data class BranchDto(
     val commit: String,
     val status: String,
     val startedAt: Instant?,
+    val runningSince: Instant? = null,
     val durationSeconds: Long?,
     val artifactKey: String,
     val latestGreenUrl: String? = null,
@@ -65,6 +69,7 @@ data class BranchDto(
                 commit = latest.commit,
                 status = latest.status.jsonName,
                 startedAt = latest.startedAt,
+                runningSince = latest.runningSince,
                 durationSeconds = latest.duration?.seconds,
                 artifactKey = latest.artifactKey,
                 latestGreenUrl = if (hasGreenBuild) BranchPermalinks.permanentUrl(branch) else null,
@@ -80,6 +85,7 @@ data class CurrentBuildDto(
     val artifactKey: String,
     val status: String,
     val startedAt: Instant,
+    val runningSince: Instant? = null,
     val logSize: Long,
 )
 

src/main/kotlin/de/hoennig/gittally/server/BuildsApiController.kt

@@ -60,6 +60,7 @@ class BuildsApiController(
                     (results.firstOrNull { it.artifactKey == build.artifactKey }?.status ?: BuildStatus.RUNNING)
                         .jsonName,
                 startedAt = build.startedAt,
+                runningSince = build.runningSince,
                 logSize = liveLogSize(build.liveLogFile),
             )
         }

src/main/kotlin/de/hoennig/gittally/server/UiController.kt

@@ -87,6 +87,7 @@ class UiController(
                             .jsonName,
                     startedAtIso = build.startedAt.toString(),
                     startedAt = UiFormats.timestamp(build.startedAt),
+                    runningSinceIso = build.runningSince?.toString() ?: "",
                     artifactKey = build.artifactKey,
                     branchUrl = links.branchUrl(build.branch),
                     commitUrl = links.commitUrl(build.commit),

src/main/kotlin/de/hoennig/gittally/server/UiViews.kt

@@ -75,6 +75,8 @@ data class BuildRowView(
     val status: String,
     val startedAtIso: String,
     val startedAt: String,
+    /** ISO timestamp of the run start for the live build-time ticker; empty while queued. */
+    val runningSinceIso: String,
     val duration: String,
     val artifactKey: String,
     val branchUrl: String?,
@@ -94,6 +96,7 @@ data class BuildRowView(
             status = result.status.jsonName,
             startedAtIso = result.startedAt.toString(),
             startedAt = UiFormats.timestamp(result.startedAt),
+            runningSinceIso = result.runningSince?.toString() ?: "",
             duration = UiFormats.duration(result.duration),
             artifactKey = result.artifactKey,
             branchUrl = links.branchUrl(result.branch),
@@ -112,6 +115,7 @@ data class BuildRowView(
             status = entry.status,
             startedAtIso = entry.startedAt?.toString() ?: "",
             startedAt = entry.startedAt?.let { UiFormats.timestamp(it) } ?: "",
+            runningSinceIso = entry.runningSince?.toString() ?: "",
             duration = UiFormats.duration(entry.durationSeconds?.let { Duration.ofSeconds(it) }),
             artifactKey = entry.artifactKey,
             branchUrl = links.branchUrl(entry.branch),
@@ -130,6 +134,7 @@ data class CurrentBuildView(
     val status: String,
     val startedAtIso: String,
     val startedAt: String,
+    val runningSinceIso: String,
     val artifactKey: String,
     val branchUrl: String?,
     val commitUrl: String?,