From f13f4219028a1f4ef417dd7315e488bdf5e55bd1 Mon Sep 17 00:00:00 2001
From: Calin Crisan <ccrisan@gmail.com>
Date: Sun, 4 Mar 2018 17:20:28 +0200
Subject: [PATCH] build.sh: add clean-target command

---
 build.sh | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/build.sh b/build.sh
index 1861110162..931588d9ed 100755
--- a/build.sh
+++ b/build.sh
@@ -1,7 +1,12 @@
 #!/bin/bash
 
 if [ -z "$1" ]; then
-    echo "Usage: $0 <board|all> [mkimage|mkrelease|make_targets...]"
+    echo "Usage: $0 <board|all> [mkimage|mkrelease|clean-target|make-targets...]"
+    echo "    mkimage - creates the OS image (.img)"
+    echo "    mkrelease - creates the compressed OS image (.img.gz, .img.xz)"
+    echo "    clean-target - removes the target dir, preserving the package build dirs"
+    echo ""
+    echo "    for other make targets, see the BuildRoot manual"
     exit 1
 fi
 
@@ -44,6 +49,7 @@ fi
 
 if [ "$target" == "mkimage" ]; then
     $boarddir/mkimage.sh
+
 elif [ "$target" == "mkrelease" ]; then
     $boarddir/mkimage.sh
     cp $outputdir/images/$osname-$board.img $basedir
@@ -54,8 +60,23 @@ elif [ "$target" == "mkrelease" ]; then
     rm -f $basedir/$osname-$board-$osversion.img.gz
     $gzip $basedir/$osname-$board-$osversion.img
     echo "your gz image is ready at $basedir/$osname-$board-$osversion.img.gz"
+
+elif [ "$target" == "clean-target" ]; then
+    if [ -d $outputdir/build ]; then
+        echo "removing .stamp_target_installed files"
+        find $outputdir/build -name .stamp_target_installed | xargs -r rm
+    fi
+
+    if [ -d $outputdir/target ]; then
+        echo "removing target directory"
+        rm -rf $outputdir/target
+    fi
+
+    echo "target is clean"
+
 elif [ -n "$target" ]; then
     make O=$outputdir $target
+
 else
     make O=$outputdir all
     echo "build successful"