Implemented amend previous commit

README.md

@@ -18,6 +18,7 @@ Right now you CAN:
 - Commit.
 - Reset commits.
 - Revert commits.
+- Amend previous commit.
 - Merge.
 - Rebase.
 - Create and delete branches locally.

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

@@ -70,9 +70,38 @@ class LogManager @Inject constructor(
             .setRef(revCommit.name)
             .call()
     }
+
+    suspend fun latestMessage(git: Git): String = withContext(Dispatchers.IO) {
+        try {
+            val log = git.log().setMaxCount(1).call()
+            val latestCommitNode = log.firstOrNull()
+
+            return@withContext if(latestCommitNode == null)
+                ""
+            else
+                latestCommitNode.fullMessage
+
+        } catch (ex: Exception) {
+            ex.printStackTrace()
+            return@withContext ""
+        }
+
+    }
+
+    suspend fun hasPreviousCommits(git: Git): Boolean = withContext(Dispatchers.IO) {
+        try {
+            val log = git.log().setMaxCount(1).call()
+            val latestCommitNode = log.firstOrNull()
+
+            return@withContext latestCommitNode != null
+
+        } catch (ex: Exception) {
+            ex.printStackTrace()
+            return@withContext false
+        }
+    }
 }
 
-// TODO Move this to
 enum class ResetType {
     SOFT,
     MIXED,

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

@@ -188,10 +188,11 @@ class StatusManager @Inject constructor(
             .call()
     }
 
-    suspend fun commit(git: Git, message: String) = withContext(Dispatchers.IO) {
+    suspend fun commit(git: Git, message: String, amend: Boolean) = withContext(Dispatchers.IO) {
         git.commit()
             .setMessage(message)
             .setAllowEmpty(false)
+            .setAmend(amend)
             .call()
     }
 

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

@@ -122,6 +122,8 @@ class TabState @Inject constructor(
             if (showError)
                 errorsManager.addError(newErrorNow(ex, ex.localizedMessage))
         } finally {
+            operationRunning = false
+
             if (refreshType != RefreshType.NONE && (!hasProcessFailed || refreshEvenIfCrashes))
                 _refreshData.emit(refreshType)
         }

src/main/kotlin/app/ui/UncommitedChanges.kt

@@ -10,6 +10,8 @@ import androidx.compose.foundation.*
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowDropDown
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.ExperimentalComposeUiApi
@@ -33,6 +35,8 @@ import app.git.StatusEntry
 import app.theme.*
 import app.ui.components.ScrollableLazyColumn
 import app.ui.components.SecondaryButton
+import app.ui.context_menu.DropDownContent
+import app.ui.context_menu.DropDownContentData
 import app.ui.context_menu.stagedEntriesContextMenuItems
 import app.ui.context_menu.unstagedEntriesContextMenuItems
 import app.viewmodels.StageStatus
@@ -75,12 +79,14 @@ fun UncommitedChanges(
         unstaged = listOf() // return empty lists if still loading
     }
 
-    val doCommit = {
+    val doCommit = { amend: Boolean ->
-        statusViewModel.commit(commitMessage)
+        statusViewModel.commit(commitMessage, amend)
         onStagedDiffEntrySelected(null)
         statusViewModel.newCommitMessage = ""
     }
+
     val canCommit = commitMessage.isNotEmpty() && staged.isNotEmpty()
+    val canAmend = (commitMessage.isNotEmpty() || staged.isNotEmpty()) && statusViewModel.hasPreviousCommits
 
     Column {
         AnimatedVisibility(
@@ -91,7 +97,6 @@ fun UncommitedChanges(
             LinearProgressIndicator(modifier = Modifier.fillMaxWidth())
         }
 
-
         EntriesList(
             modifier = Modifier
                 .padding(start = 8.dp, end = 8.dp, bottom = 4.dp)
@@ -169,7 +174,7 @@ fun UncommitedChanges(
                         .weight(weight = 1f, fill = true)
                         .onPreviewKeyEvent {
                             if (it.isCtrlPressed && it.key == Key.Enter && canCommit) {
-                                doCommit()
+                                doCommit(false)
                                 true
                             } else
                                 false
@@ -185,7 +190,7 @@ fun UncommitedChanges(
                 repositoryState.isMerging -> MergeButtons(
                     haveConflictsBeenSolved = unstaged.isEmpty(),
                     onAbort = { statusViewModel.abortMerge() },
-                    onMerge = { doCommit() }
+                    onMerge = { doCommit(false) }
                 )
                 repositoryState.isRebasing -> RebasingButtons(
                     canContinue = staged.isNotEmpty() || unstaged.isNotEmpty(),
@@ -194,25 +199,84 @@ fun UncommitedChanges(
                     onContinue = { statusViewModel.continueRebase() },
                     onSkip = { statusViewModel.skipRebase() },
                 )
-                else -> {
+                else -> UncommitedChangesButtons(
+                    canCommit = canCommit,
+                    canAmend = canAmend,
+                    onCommit = { amend -> doCommit(amend) },
+                )
+            }
+        }
+    }
+
+}
+
+@Composable
+fun UncommitedChangesButtons(
+    canCommit: Boolean,
+    canAmend: Boolean,
+    onCommit: (Boolean) -> Unit
+) {
+    var showDropDownMenu by remember { mutableStateOf(false) }
+
+
+    Row(
+        modifier = Modifier
+            .padding(top = 2.dp)
+    ) {
         Button(
             modifier = Modifier
-                            .fillMaxWidth(),
+                .weight(1f)
-                        onClick = doCommit,
+                .height(40.dp),
+            onClick = { onCommit(false) },
             enabled = canCommit,
             shape = RectangleShape,
         ) {
-
             Text(
                 text = "Commit",
                 fontSize = 14.sp,
             )
         }
-                }
+        Spacer(
-            }
+            modifier = Modifier
-        }
+                .width(1.dp)
-    }
+                .height(40.dp),
+        )
 
+        Box(
+            modifier = Modifier
+                .height(40.dp)
+                .background(MaterialTheme.colors.primary)
+                .clickable { showDropDownMenu = true },
+        ) {
+            Icon(
+                Icons.Default.ArrowDropDown,
+                contentDescription = null,
+                tint = MaterialTheme.colors.inversePrimaryTextColor,
+                modifier = Modifier
+                    .padding(horizontal = 8.dp)
+                    .align(Alignment.Center),
+            )
+            DropdownMenu(
+                onDismissRequest = {
+                    showDropDownMenu = false
+                },
+                content = {
+                    DropDownContent(
+                        enabled = canAmend,
+                        dropDownContentData = DropDownContentData(
+                            label = "Amend previous commit",
+                            icon = null,
+                            onClick = { onCommit(true) }
+                        ),
+                        onDismiss = { showDropDownMenu = false }
+                    )
+                },
+                expanded = showDropDownMenu,
+            )
+
+        }
+//        }
+    }
 }
 
 @Composable

src/main/kotlin/app/ui/context_menu/DropDownContent.kt

@@ -8,8 +8,13 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.unit.sp
 
 @Composable
-fun DropDownContent(dropDownContentData: DropDownContentData, onDismiss: () -> Unit) {
+fun DropDownContent(
+    dropDownContentData: DropDownContentData,
+    enabled: Boolean = true,
+    onDismiss: () -> Unit,
+) {
     DropdownMenuItem(
+        enabled = enabled,
         onClick = {
             dropDownContentData.onClick()
             onDismiss()

src/main/kotlin/app/viewmodels/StatusViewModel.kt

@@ -17,6 +17,7 @@ class StatusViewModel @Inject constructor(
     private val repositoryManager: RepositoryManager,
     private val rebaseManager: RebaseManager,
     private val mergeManager: MergeManager,
+    private val logManager: LogManager,
 ) {
     private val _stageStatus = MutableStateFlow<StageStatus>(StageStatus.Loaded(listOf(), listOf()))
     val stageStatus: StateFlow<StageStatus> = _stageStatus
@@ -29,6 +30,8 @@ class StatusViewModel @Inject constructor(
             _commitMessage.value = value
         }
 
+    var hasPreviousCommits = true // When false, disable "amend previous commit"
+
     private var lastUncommitedChangesState = false
 
     fun stage(diffEntry: DiffEntry) = tabState.runOperation(
@@ -89,10 +92,15 @@ class StatusViewModel @Inject constructor(
         lastUncommitedChangesState = statusManager.hasUncommitedChanges(git)
     }
 
-    fun commit(message: String) = tabState.safeProcessing(
+    fun commit(message: String, amend: Boolean) = tabState.safeProcessing(
         refreshType = RefreshType.ALL_DATA,
     ) { git ->
-        statusManager.commit(git, message)
+        val commitMessage = if(amend && message.isBlank()) {
+            logManager.latestMessage(git)
+        } else
+            message
+
+        statusManager.commit(git, commitMessage, amend)
     }
 
     suspend fun refresh(git: Git) = withContext(Dispatchers.IO) {
@@ -110,6 +118,7 @@ class StatusViewModel @Inject constructor(
         loadHasUncommitedChanges(git)
 
         val hasNowUncommitedChanges = this.lastUncommitedChangesState
+        hasPreviousCommits = logManager.hasPreviousCommits(git)
 
         // Return true to update the log only if the uncommitedChanges status has changed
         return (hasNowUncommitedChanges != hadUncommitedChanges)