refactor: enhance cleanup process in Jenkinsfile and build-liveiso.sh

Jenkinsfile

@@ -3,14 +3,32 @@ pipeline {
 
     environment {
         ROOTFS_JOB = "espos-rootfs"
+        WORKDIR = "${WORKSPACE}/work"
     }
 
     stages {
+        stage('Cleanup Previous Mounts') {
+            steps {
+                sh '''
+                    sudo umount -R "$WORKDIR/rootfs" 2>/dev/null || true
+
+                    sudo umount -lf "$WORKDIR/rootfs/dev/pts" 2>/dev/null || true
+                    sudo umount -lf "$WORKDIR/rootfs/dev/shm" 2>/dev/null || true
+                    sudo umount -lf "$WORKDIR/rootfs/dev" 2>/dev/null || true
+                    sudo umount -lf "$WORKDIR/rootfs/proc" 2>/dev/null || true
+                    sudo umount -lf "$WORKDIR/rootfs/sys" 2>/dev/null || true
+
+                    sudo rm -rf "$WORKDIR" || true
+                '''
+            }
+        }
+
         stage("Checkout") {
             steps {
                 checkout scm
             }
         }
+
         stage('Download RootFS') {
             steps {
                 copyArtifacts(
@@ -31,6 +49,18 @@ pipeline {
     }
 
     post {
+        always {
+            sh '''
+                sudo umount -R "$WORKDIR/rootfs" 2>/dev/null || true
+
+                sudo umount -lf "$WORKDIR/rootfs/dev/pts" 2>/dev/null || true
+                sudo umount -lf "$WORKDIR/rootfs/dev/shm" 2>/dev/null || true
+                sudo umount -lf "$WORKDIR/rootfs/dev" 2>/dev/null || true
+                sudo umount -lf "$WORKDIR/rootfs/proc" 2>/dev/null || true
+                sudo umount -lf "$WORKDIR/rootfs/sys" 2>/dev/null || true
+            '''
+        }
+
         success {
             archiveArtifacts(
                 artifacts: '*.iso',

build-liveiso.sh

@@ -10,7 +10,17 @@ rm -rf "$WORKDIR"
 
 mkdir -p "$ROOTFS"
 mkdir -p "$ISO/live"
+cleanup() {
+    umount -R "$ROOTFS" 2>/dev/null || true
 
+    umount -lf "$ROOTFS/dev/pts" 2>/dev/null || true
+    umount -lf "$ROOTFS/dev/shm" 2>/dev/null || true
+    umount -lf "$ROOTFS/dev" 2>/dev/null || true
+    umount -lf "$ROOTFS/proc" 2>/dev/null || true
+    umount -lf "$ROOTFS/sys" 2>/dev/null || true
+}
+
+trap cleanup EXIT
 echo "=== Extracting RootFS ==="
 
 tar --zstd -xf espos-openrc-rootfs.tar.zst -C "$ROOTFS"