From 6d5cf3aa0b8a7cabc50e091c444b8ed4c73dc1ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adrian=20Schr=C3=B6ter?= <adrian@suse.de>
Date: Thu, 28 Nov 2019 09:37:33 +0100
Subject: implement --shell-cmd "CMD" option

also justify code to have only one place to run the shell or command
---
 build    | 23 +++++++++++++++++++----
 build-vm |  8 +++-----
 2 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/build b/build
index 93dca5a..ed5e0c9 100755
--- a/build
+++ b/build
@@ -104,6 +104,7 @@ RSYNCDONE=
 SIGNDUMMY=
 DO_STATISTICS=
 RUN_SHELL=
+RUN_SHELL_CMD=
 CCACHE=
 DLNOSIGNATURE=
 BUILD_FLAVOR=
@@ -163,6 +164,10 @@ Known Parameters:
   --shell     Instead of starting a build start a root shell in
               the build root.
 
+  --shell-cmd CMD
+              Run the command CMD instead of giving a root shell
+              --shell option is implicit set.
+
   --sysrq $   Sends a single specifed char as sysrq to the running
               kernel of the build.
 
@@ -1019,6 +1024,12 @@ while test -n "$1"; do
 	RUN_SHELL=1
 	shift
       ;;
+      -shell-cmd)
+	needarg
+	RUN_SHELL=1
+	RUN_SHELL_CMD="$ARG"
+	shift
+      ;;
       -signdummy)
 	SIGNDUMMY=1
       ;;
@@ -1383,10 +1394,14 @@ for RECIPEFILE in "${RECIPEFILES[@]}" ; do
     setupccache
 
     if test -n "$RUN_SHELL" ; then
-	echo "You may want to initialize environment via:"
-	echo " su - $BUILD_USER"
-	chroot $BUILD_ROOT
-	cleanup_and_exit 0
+        if test -z "$RUN_SHELL_CMD" ; then
+            echo ""
+            echo "You may want to initialize environment via:"
+            echo "  su - $BUILD_USER"
+            echo ""
+        fi
+	chroot $BUILD_ROOT "${RUN_SHELL_CMD:=/bin/bash}"
+        cleanup_and_exit $?
     fi
 
     # fill build directories with sources. Also sets TOPDIR
diff --git a/build-vm b/build-vm
index 0f53c66..0681797 100644
--- a/build-vm
+++ b/build-vm
@@ -863,6 +863,7 @@ vm_first_stage() {
     echo ")" >> $BUILD_ROOT/.build/build.data
     echo "VM_TYPE='$VM_TYPE'" >> $BUILD_ROOT/.build/build.data
     echo "RUN_SHELL='$RUN_SHELL'" >> $BUILD_ROOT/.build/build.data
+    echo "RUN_SHELL_CMD='$RUN_SHELL_CMD'" >> $BUILD_ROOT/.build/build.data
     echo "DO_STATISTICS='$DO_STATISTICS'" >> $BUILD_ROOT/.build/build.data
     echo "TIME_PREINSTALL='$TIME_PREINSTALL'" >> $BUILD_ROOT/.build/build.data
     echo "VM_WATCHDOG='$VM_WATCHDOG'" >> $BUILD_ROOT/.build/build.data
@@ -881,11 +882,8 @@ vm_first_stage() {
     umount -n $BUILD_ROOT/mnt 2> /dev/null || true
 
     vm_init_script="/.build/build"
-    if test -n "$RUN_SHELL"; then
-        vm_init_script="/bin/bash"
-    fi
     if check_use_emulator ; then
-	vm_init_script="/.build/$INITVM_NAME"
+        vm_init_script="/.build/$INITVM_NAME"
     fi
     if test -n "$VM_ROOT" ; then
 	# copy out kernel & initrd (if they exist) during unmounting VM image
@@ -936,7 +934,7 @@ vm_first_stage() {
     fi
 
     vm_attach_root
-    if test -n "$VM_SWAP" ; then
+    if test -n "$VM_SWAP" -a -z "$RUN_SHELL" ; then
 	vm_attach_swap
 	BUILDSTATUS=$(dd if="$VM_SWAP" bs=12 count=1 2>/dev/null | tr '\0' a)
 	case $BUILDSTATUS in
-- 
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