Add the ability to run garbage collection on the internal Git repository (#1683)

4 files changed, 44 insertions, 1 deletions

diff --git a/app/src/main/java/dev/msfjarvis/aps/ui/git/base/BaseGitActivity.kt b/app/src/main/java/dev/msfjarvis/aps/ui/git/base/BaseGitActivity.kt
index a008f6c7..e44e3e3c 100644
--- a/app/src/main/java/dev/msfjarvis/aps/ui/git/base/BaseGitActivity.kt
+++ b/app/src/main/java/dev/msfjarvis/aps/ui/git/base/BaseGitActivity.kt
@@ -19,6 +19,7 @@ import dev.msfjarvis.aps.util.extensions.sharedPrefs
 import dev.msfjarvis.aps.util.git.ErrorMessages
 import dev.msfjarvis.aps.util.git.operation.BreakOutOfDetached
 import dev.msfjarvis.aps.util.git.operation.CloneOperation
+import dev.msfjarvis.aps.util.git.operation.GcOperation
 import dev.msfjarvis.aps.util.git.operation.PullOperation
 import dev.msfjarvis.aps.util.git.operation.PushOperation
 import dev.msfjarvis.aps.util.git.operation.ResetToRemoteOperation
@@ -51,6 +52,7 @@ abstract class BaseGitActivity : ContinuationContainerActivity() {
     PUSH,
     RESET,
     SYNC,
+    GC,
   }
 
   @Inject lateinit var gitSettings: GitSettings
@@ -77,8 +79,14 @@ abstract class BaseGitActivity : ContinuationContainerActivity() {
         GitOp.SYNC -> SyncOperation(this, gitSettings.rebaseOnPull)
         GitOp.BREAK_OUT_OF_DETACHED -> BreakOutOfDetached(this)
         GitOp.RESET -> ResetToRemoteOperation(this)
+        GitOp.GC -> GcOperation(this)
       }
-    return op.executeAfterAuthentication(gitSettings.authMode).mapError(::transformGitError)
+    return (if (op.requiresAuth) {
+        op.executeAfterAuthentication(gitSettings.authMode)
+      } else {
+        op.execute()
+      })
+      .mapError(::transformGitError)
   }
 
   fun finishOnSuccessHandler(@Suppress("UNUSED_PARAMETER") nothing: Unit) {
diff --git a/app/src/main/java/dev/msfjarvis/aps/ui/git/config/GitConfigActivity.kt b/app/src/main/java/dev/msfjarvis/aps/ui/git/config/GitConfigActivity.kt
index 04014e17..4fed7b99 100644
--- a/app/src/main/java/dev/msfjarvis/aps/ui/git/config/GitConfigActivity.kt
+++ b/app/src/main/java/dev/msfjarvis/aps/ui/git/config/GitConfigActivity.kt
@@ -124,6 +124,15 @@ class GitConfigActivity : BaseGitActivity() {
           )
       }
     }
+    binding.gitGc.setOnClickListener {
+      lifecycleScope.launch {
+        launchGitOperation(GitOp.GC)
+          .fold(
+            success = ::finishOnSuccessHandler,
+            failure = { err -> promptOnErrorHandler(err) { finish() } },
+          )
+      }
+    }
   }
 
   /**
diff --git a/app/src/main/java/dev/msfjarvis/aps/util/git/operation/GcOperation.kt b/app/src/main/java/dev/msfjarvis/aps/util/git/operation/GcOperation.kt
new file mode 100644
index 00000000..c070027e
--- /dev/null
+++ b/app/src/main/java/dev/msfjarvis/aps/util/git/operation/GcOperation.kt
@@ -0,0 +1,22 @@
+/*
+ * Copyright © 2014-2022 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package dev.msfjarvis.aps.util.git.operation
+
+import dev.msfjarvis.aps.util.git.sshj.ContinuationContainerActivity
+import org.eclipse.jgit.api.GitCommand
+
+/**
+ * Run an aggressive garbage collection job on the repository, expiring every loose object to
+ * achieve the best compression.
+ */
+class GcOperation(
+  callingActivity: ContinuationContainerActivity,
+) : GitOperation(callingActivity) {
+
+  override val requiresAuth: Boolean = false
+  override val commands: Array<GitCommand<out Any>> =
+    arrayOf(git.gc().setAggressive(true).setExpire(null))
+}
diff --git a/app/src/main/java/dev/msfjarvis/aps/util/git/operation/GitOperation.kt b/app/src/main/java/dev/msfjarvis/aps/util/git/operation/GitOperation.kt
index 141de348..fe464069 100644
--- a/app/src/main/java/dev/msfjarvis/aps/util/git/operation/GitOperation.kt
+++ b/app/src/main/java/dev/msfjarvis/aps/util/git/operation/GitOperation.kt
@@ -57,7 +57,11 @@ import org.eclipse.jgit.transport.URIish
  */
 abstract class GitOperation(protected val callingActivity: FragmentActivity) {
 
+  /** List of [GitCommand]s that are executed by an operation. */
   abstract val commands: Array<GitCommand<out Any>>
+
+  /** Whether the operation requires authentication or not. */
+  open val requiresAuth: Boolean = true
   private val hostKeyFile = callingActivity.filesDir.resolve(".host_key")
   private var sshSessionFactory: SshjSessionFactory? = null
   private val hiltEntryPoint =