Added push with lease + fixed push after changing tracking branch

Fixes #147

src/main/kotlin/com/jetpackduba/gitnuro/git/branches/GetTrackingBranchUseCase.kt

@@ -9,11 +9,15 @@ import javax.inject.Inject
 
 class GetTrackingBranchUseCase @Inject constructor() {
     operator fun invoke(git: Git, ref: Ref): TrackingBranch? {
+        return this.invoke(git, ref.simpleName)
+    }
+
+    operator fun invoke(git: Git, refName: String): TrackingBranch? {
         val repository: Repository = git.repository
 
         val config: Config = repository.config
-        val remote: String? = config.getString("branch", ref.simpleName, "remote")
-        val branch: String? = config.getString("branch", ref.simpleName, "merge")
+        val remote: String? = config.getString("branch", refName, "remote")
+        val branch: String? = config.getString("branch", refName, "merge")
 
         if (remote != null && branch != null) {
             return TrackingBranch(remote, branch.removePrefix(BranchesConstants.UPSTREAM_BRANCH_CONFIG_PREFIX))

src/main/kotlin/com/jetpackduba/gitnuro/git/remote_operations/PushBranchUseCase.kt

@@ -1,28 +1,70 @@
 package com.jetpackduba.gitnuro.git.remote_operations
 
+import com.jetpackduba.gitnuro.git.branches.GetTrackingBranchUseCase
 import com.jetpackduba.gitnuro.git.isRejected
 import com.jetpackduba.gitnuro.git.statusMessage
+import com.jetpackduba.gitnuro.preferences.AppSettings
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.withContext
 import org.eclipse.jgit.api.Git
+import org.eclipse.jgit.lib.Constants
 import org.eclipse.jgit.lib.ProgressMonitor
+import org.eclipse.jgit.transport.RefLeaseSpec
 import org.eclipse.jgit.transport.RefSpec
 import javax.inject.Inject
 
 class PushBranchUseCase @Inject constructor(
     private val handleTransportUseCase: HandleTransportUseCase,
+    private val getTrackingBranchUseCase: GetTrackingBranchUseCase,
+    private val appSettings: AppSettings,
 ) {
     suspend operator fun invoke(git: Git, force: Boolean, pushTags: Boolean) = withContext(Dispatchers.IO) {
-        val currentBranchRefSpec = git.repository.fullBranch
+        val currentBranch = git.repository.fullBranch
+        val tracking = getTrackingBranchUseCase(git, git.repository.branch)
+        val refSpecStr = if (tracking != null) {
+            "$currentBranch:${Constants.R_HEADS}${tracking.branch}"
+        } else {
+            currentBranch
+        }
 
         val pushResult = git
             .push()
-            .setRefSpecs(RefSpec(currentBranchRefSpec))
+            .setRefSpecs(RefSpec(refSpecStr))
+            .run {
+                if (tracking != null) {
+                    setRemote(tracking.remote)
+                } else {
+                    this
+                }
+            }
             .setForce(force)
-            .apply {
-                if (pushTags)
+            .run {
+                if (force && appSettings.pushWithLease) {
+
+                    if (tracking != null) {
+                        val remoteBranchName = "${Constants.R_REMOTES}$remote/${tracking.branch}"
+
+                        val remoteBranchRef = git.repository.findRef(remoteBranchName)
+                        if (remoteBranchRef != null) {
+                            return@run setRefLeaseSpecs(
+                                RefLeaseSpec(
+                                    "${Constants.R_HEADS}${tracking.branch}",
+                                    remoteBranchRef.objectId.name
+                                )
+                            )
+                        }
+                    }
+                }
+
+                return@run this
+            }
+            .run {
+                if (pushTags) {
                     setPushTags()
+                } else {
+                    this
+                }
             }
             .setTransportConfigCallback { handleTransportUseCase(it, git) }
             .setProgressMonitor(object : ProgressMonitor {
@@ -35,14 +77,28 @@ class PushBranchUseCase @Inject constructor(
             })
             .call()
 
-        val results =
-            pushResult.map { it.remoteUpdates.filter { remoteRefUpdate -> remoteRefUpdate.status.isRejected } }
-                .flatten()
+        val results = pushResult
+            .map {
+                it.remoteUpdates.filter { remoteRefUpdate -> remoteRefUpdate.status.isRejected }
+            }
+            .flatten()
         if (results.isNotEmpty()) {
             val error = StringBuilder()
 
             results.forEach { result ->
-                error.append(result.statusMessage)
+                val statusMessage = result.statusMessage
+                val extraMessage = if (statusMessage == "Ref rejected, old object id in remote has changed.") {
+                    "Force push can't be completed without fetching first the remote changes."
+                } else
+                    null
+
+                error.append(statusMessage)
+
+                if (extraMessage != null) {
+                    error.append("\n")
+                    error.append(extraMessage)
+                }
+
                 error.append("\n")
             }
 

src/main/kotlin/com/jetpackduba/gitnuro/preferences/AppSettings.kt

@@ -7,10 +7,7 @@ import com.jetpackduba.gitnuro.theme.ColorsScheme
 import com.jetpackduba.gitnuro.theme.Theme
 import com.jetpackduba.gitnuro.viewmodels.TextDiffType
 import com.jetpackduba.gitnuro.viewmodels.textDiffTypeFromValue
-import kotlinx.coroutines.flow.MutableSharedFlow
-import kotlinx.coroutines.flow.MutableStateFlow
-import kotlinx.coroutines.flow.asSharedFlow
-import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.*
 import kotlinx.serialization.decodeFromString
 import kotlinx.serialization.json.Json
 import java.io.File
@@ -37,6 +34,7 @@ private const val PREF_TERMINAL_PATH = "terminalPath"
 
 private const val PREF_GIT_FF_MERGE = "gitFFMerge"
 private const val PREF_GIT_PULL_REBASE = "gitPullRebase"
+private const val PREF_GIT_PUSH_WITH_LEASE = "gitPushWithLease"
 
 private const val DEFAULT_COMMITS_LIMIT = 1000
 private const val DEFAULT_COMMITS_LIMIT_ENABLED = true
@@ -62,6 +60,9 @@ class AppSettings @Inject constructor() {
     private val _pullRebaseFlow = MutableStateFlow(pullRebase)
     val pullRebaseFlow = _pullRebaseFlow.asStateFlow()
 
+    private val _pushWithLeaseFlow = MutableStateFlow(pushWithLease)
+    val pushWithLeaseFlow: StateFlow<Boolean> = _pushWithLeaseFlow.asStateFlow()
+
     private val _commitsLimitFlow = MutableSharedFlow<Int>()
     val commitsLimitFlow = _commitsLimitFlow.asSharedFlow()
 
@@ -164,6 +165,15 @@ class AppSettings @Inject constructor() {
             _pullRebaseFlow.value = value
         }
 
+    var pushWithLease: Boolean
+        get() {
+            return preferences.getBoolean(PREF_GIT_PUSH_WITH_LEASE, true)
+        }
+        set(value) {
+            preferences.putBoolean(PREF_GIT_PUSH_WITH_LEASE, value)
+            _pushWithLeaseFlow.value = value
+        }
+
     val commitsLimit: Int
         get() {
             return preferences.getInt(PREF_COMMITS_LIMIT, DEFAULT_COMMITS_LIMIT)

src/main/kotlin/com/jetpackduba/gitnuro/ui/dialogs/settings/SettingsDialog.kt

@@ -219,6 +219,7 @@ private fun CommitsHistory(settingsViewModel: SettingsViewModel) {
 @Composable
 private fun RemoteActions(settingsViewModel: SettingsViewModel) {
     val pullRebase by settingsViewModel.pullRebaseFlow.collectAsState()
+    val pushWithLease by settingsViewModel.pushWithLeaseFlow.collectAsState()
 
     SettingToggle(
         title = "Pull with rebase as default",
@@ -228,6 +229,15 @@ private fun RemoteActions(settingsViewModel: SettingsViewModel) {
             settingsViewModel.pullRebase = value
         }
     )
+
+    SettingToggle(
+        title = "Force push with lease",
+        subtitle = "Check if the local version remote branch is up to date to avoid accidentally overriding unintended commits",
+        value = pushWithLease,
+        onValueChanged = { value ->
+            settingsViewModel.pushWithLease = value
+        }
+    )
 }
 
 @Composable

src/main/kotlin/com/jetpackduba/gitnuro/viewmodels/SettingsViewModel.kt

@@ -24,6 +24,7 @@ class SettingsViewModel @Inject constructor(
     val themeState = appSettings.themeState
     val ffMergeFlow = appSettings.ffMergeFlow
     val pullRebaseFlow = appSettings.pullRebaseFlow
+    val pushWithLeaseFlow = appSettings.pushWithLeaseFlow
     val commitsLimitEnabledFlow = appSettings.commitsLimitEnabledFlow
     val swapUncommitedChangesFlow = appSettings.swapUncommitedChangesFlow
     val terminalPathFlow = appSettings.terminalPathFlow
@@ -58,6 +59,12 @@ class SettingsViewModel @Inject constructor(
             appSettings.pullRebase = value
         }
 
+    var pushWithLease: Boolean
+        get() = appSettings.pushWithLease
+        set(value) {
+            appSettings.pushWithLease = value
+        }
+
     var theme: Theme
         get() = appSettings.theme
         set(value) {