Added status update when file system changes (excluding ignored dirs)

src/main/kotlin/app/git/FileChangesWatcher.kt

@@ -0,0 +1,52 @@
+package app.git
+
+import kotlinx.coroutines.flow.flow
+import java.io.IOException
+import java.nio.file.*
+import java.nio.file.StandardWatchEventKinds.*
+import java.nio.file.attribute.BasicFileAttributes
+import javax.inject.Inject
+
+
+class FileChangesWatcher @Inject constructor() {
+    suspend fun watchDirectoryPath(pathStr: String, ignoredDirsPath: List<String>) = flow {
+        val watchService = FileSystems.getDefault().newWatchService()
+
+        val path = Paths.get(pathStr)
+
+        path.register(
+            watchService,
+            ENTRY_CREATE,
+            ENTRY_DELETE,
+            ENTRY_MODIFY
+        )
+
+        // register directory and sub-directories
+        Files.walkFileTree(path, object : SimpleFileVisitor<Path>() {
+            @Throws(IOException::class)
+            override fun preVisitDirectory(dir: Path, attrs: BasicFileAttributes): FileVisitResult {
+                val isIgnoredDirectory = ignoredDirsPath.any { "$pathStr/$it" == dir.toString() }
+
+                return if(!isIgnoredDirectory) {
+                    dir.register(watchService, ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY)
+                    FileVisitResult.CONTINUE
+                } else {
+                    FileVisitResult.SKIP_SUBTREE
+                }
+            }
+        })
+
+        var key: WatchKey
+        while (watchService.take().also { key = it } != null) {
+            this.emit(Unit)
+            for (event: WatchEvent<*> in key.pollEvents()) {
+                println(
+                    "Event kind:" + event.kind()
+                            + ". File affected: " + event.context() + "."
+                )
+            }
+            key.reset()
+        }
+    }
+
+}

src/main/kotlin/app/git/GitManager.kt

@@ -15,7 +15,10 @@ import app.AppStateManager
 import app.app.Error
 import app.app.ErrorsManager
 import app.app.newErrorNow
+import app.extensions.dirPath
+import kotlinx.coroutines.flow.collect
 import org.eclipse.jgit.lib.ObjectId
+import org.eclipse.jgit.treewalk.FileTreeIterator
 import java.io.File
 import javax.inject.Inject
 
@@ -30,6 +33,7 @@ class GitManager @Inject constructor(
     private val tagsManager: TagsManager,
     val errorsManager: ErrorsManager,
     val appStateManager: AppStateManager,
+    private val fileChangesWatcher: FileChangesWatcher,
 ) {
     val repositoryName: String
         get() = safeGit.repository.directory.parentFile.name
@@ -115,6 +119,9 @@ class GitManager @Inject constructor(
 
                 onRepositoryChanged(repository.directory.parent)
                 refreshRepositoryInfo()
+                launch {
+                    watchRepositoryChanges()
+                }
             } catch (ex: Exception) {
                 ex.printStackTrace()
                 onRepositoryChanged(null)
@@ -123,6 +130,21 @@ class GitManager @Inject constructor(
         }
     }
 
+    private suspend fun watchRepositoryChanges() {
+        val ignored = safeGit.status().call().ignoredNotInIndex.toList()
+
+        fileChangesWatcher.watchDirectoryPath(
+            pathStr = safeGit.repository.directory.parent,
+            ignoredDirsPath = ignored,
+        ).collect {
+            safeProcessing {
+                println("Changes detected, loading status")
+                statusManager.loadHasUncommitedChanges(safeGit)
+                statusManager.loadStatus(safeGit)
+            }
+        }
+    }
+
     fun loadLog() = managerScope.launch {
         coLoadLog()
     }

src/main/kotlin/app/git/StatusManager.kt

@@ -35,8 +35,10 @@ class StatusManager @Inject constructor() {
     }
 
     suspend fun loadStatus(git: Git) = withContext(Dispatchers.IO) {
+        val previousStatus = _stageStatus.value
         _stageStatus.value = StageStatus.Loading
 
+        try {
             loadHasUncommitedChanges(git)
 
             val staged = git
@@ -51,8 +53,12 @@ class StatusManager @Inject constructor() {
                 .call()
 
             ensureActive()
-
             _stageStatus.value = StageStatus.Loaded(staged, unstaged)
+        } catch(ex: Exception) {
+            _stageStatus.value = previousStatus
+            throw ex
+        }
+
     }
 
     suspend fun stage(git: Git, diffEntry: DiffEntry) = withContext(Dispatchers.IO) {