Tweak build script and docker setup

- Output deb files to debs/ folder by default.
- Use $HOME/.termux-build for build folder by default (changed
  from previous $HOME/termux).
- Make scripts/run-docker.sh re-use a single container instead of
  creating new ones for each run.
- Avoid mounting the whole Termux build folder in docker. This
  fixes #294, mmap not supported host folders under OS X.
- Add a scripts/update-docker.sh utility for checking for an
  updated docker image..
- Make build-package.sh support the [-a ARCH] flag to specify arch.
- Make aarch64 the default arch (from previous arm).
- Try to improve the README a bit.

diff --git a/.gitignore b/.gitignore
index be6a749..71aec2f 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 Session.vim
 .netrwhist
 *~
+/debs/

diff --git a/README.md b/README.md
index a0da28c..7df2221 100644 (file)
--- a/README.md
+++ b/README.md
@@ -27,16 +27,22 @@ adapted from the below setup for Ubuntu:
 
 Build environment using Docker
 ==============================
-A Docker container configured for building images can be downloaded an run with:
+A Docker container configured for building images can be downloaded and run with:
 
     ./scripts/run-docker.sh
 
 This will set you up with a interactive prompt in a container, where this source folder
 is mounted as the /root/termux-packages data volume, so changes are kept in sync between
-the host and the container when trying things out before committing.
+the host and the container when trying things out before committing, and built deb files
+will be available on the host in the `debs/` directory just as when building on the host.
 
-The build output folder is mounted to $HOME/termux, so deb files can be found in
-$HOME/termux/_deb on the host for trying them out on a device or emulator.
+Build commands can be given to be executed in the docker container directly:
+
+    ./scripts/run-docker.sh ./build-package.sh libandroid-support
+
+will launch the docker container, execute the `./build-package.sh libandroid-support`
+command inside it and afterwards return you to the host prompt, with the newly built
+deb in `debs/` to try out.
 
 
 Building a package
@@ -45,13 +51,19 @@ The basic build operation is to run `./build-package.sh $PKG`, which:
 
 * Sets up a patched stand-alone Android NDK toolchain if necessary.
 
-* Reads `packages/$PKG/build.s`h to find out where to find the source code of the  package and how to build it.
+* Reads `packages/$PKG/build.sh` to find out where to find the source code of the package and how to build it.
+
+* Extracts the source in `$HOME/.termux-build/$PKG/src`.
 
 * Applies all patches in packages/$PKG/\*.patch.
 
-* Builds the package and installs it to `$PREFIX`.
+* Builds the package under `$HOME/.termux-build/$PKG/` (either in the build/ directory there or in the
+  src/ directory if the package is specified to build in the src dir) and installs it to `$PREFIX`.
+
+* Extracts modified files in `$PREFIX` into `$HOME/.termux-build/$PKG/massage` and massages the
+  files there for distribution (removes some files, splits it up in sub-packages, modifies elf files).
 
-* Creates a dpkg package file for distribution in `$HOME/termux/_deb`.
+* Creates a deb package file for distribution in `debs/`.
 
 Reading `build-package.sh` is the best way to understand what is going on.
 

diff --git a/build-all.sh b/build-all.sh
index f6c1e9a..c0bff91 100755 (executable)
--- a/build-all.sh
+++ b/build-all.sh
@@ -3,24 +3,27 @@
 
 set -e -u -o pipefail
 
+# Read settings from .termuxrc if existing
+test -f $HOME/.termuxrc && . $HOME/.termuxrc
+: ${TERMUX_TOPDIR:="$HOME/.termux-build"}
+
 BUILDSCRIPT=`dirname $0`/build-package.sh
-BUILDORDER_FILE=$HOME/termux/_buildall/buildorder.txt
-BUILDSTATUS_FILE=$HOME/termux/_buildall/buildstatus.txt
+BUILDORDER_FILE=$TERMUX_TOPDIR/_buildall/buildorder.txt
+BUILDSTATUS_FILE=$TERMUX_TOPDIR/_buildall/buildstatus.txt
 
 if [ -e $BUILDORDER_FILE ]; then
        echo "Using existing buildorder file: $BUILDORDER_FILE"
 else
-       rm -Rf $HOME/termux/* /data/data $HOME/termux/_buildall
-       mkdir -p $HOME/termux/_buildall
+       mkdir -p $TERMUX_TOPDIR/_buildall
        ./scripts/buildorder.py > $BUILDORDER_FILE
 fi
 if [ -e $BUILDSTATUS_FILE ]; then
        echo "Continuing build-all from: $BUILDSTATUS_FILE"
 fi
 
-exec >  >(tee -a $HOME/termux/_buildall/ALL.out)
-exec 2> >(tee -a $HOME/termux/_buildall/ALL.err >&2)
-trap 'echo failure; echo See: $HOME/termux/_buildall/${package}.err' ERR
+exec >  >(tee -a $TERMUX_TOPDIR/_buildall/ALL.out)
+exec 2> >(tee -a $TERMUX_TOPDIR/_buildall/ALL.err >&2)
+trap 'echo failure; echo See: $TERMUX_TOPDIR/_buildall/${package}.err' ERR
 
 for package in `cat $BUILDORDER_FILE`; do
        # Check build status (grepping is a bit crude, but it works)
@@ -32,7 +35,7 @@ for package in `cat $BUILDORDER_FILE`; do
 
        echo -n "Building $package... "
        BUILD_START=`date "+%s"`
-       bash -x $BUILDSCRIPT $package > $HOME/termux/_buildall/${package}.out 2> $HOME/termux/_buildall/${package}.err
+       bash -x $BUILDSCRIPT $package > $TERMUX_TOPDIR/_buildall/${package}.out 2> $TERMUX_TOPDIR/_buildall/${package}.err
        BUILD_END=`date "+%s"`
        BUILD_SECONDS=$(( $BUILD_END - $BUILD_START ))
        echo "done in $BUILD_SECONDS"

diff --git a/build-package.sh b/build-package.sh
index 915e050..34e9181 100755 (executable)
--- a/build-package.sh
+++ b/build-package.sh
@@ -2,52 +2,97 @@
 
 set -e -o pipefail -u
 
-if [ "$#" -ne 1 ]; then echo "ERROR: Specify one argument (name of or path to package)"; exit 1; fi
-export TERMUX_PKG_NAME=`basename $1`
-export TERMUX_SCRIPTDIR=`cd $(dirname $0); pwd`
-
-if [[ $1 == *"/"* ]]; then
-  # Path to directory which may be outside this repo:
-  if [ ! -d $1 ]; then echo "ERROR: '$1' seems to be a path but is not a directory"; exit 1; fi
-  export TERMUX_PKG_BUILDER_DIR=`realpath $1`
-else
-  # Package name:
-  export TERMUX_PKG_BUILDER_DIR=$TERMUX_SCRIPTDIR/packages/$TERMUX_PKG_NAME
-fi
-export TERMUX_PKG_BUILDER_SCRIPT=$TERMUX_PKG_BUILDER_DIR/build.sh
-if test ! -f $TERMUX_PKG_BUILDER_SCRIPT; then echo "ERROR: No build.sh script at supposed package dir $TERMUX_PKG_BUILDER_DIR!"; exit 1; fi
-
-echo "termux - building $1..."
-test -t 1 && printf "\033]0;$1...\007"
-
-# Read settings from .termuxrc if existing
+# Read settings from .termuxrc if existing:
 test -f $HOME/.termuxrc && . $HOME/.termuxrc
 
-# Configurable settings
-: ${NDK:="${HOME}/lib/android-ndk"}
+# Configurable settings:
 : ${ANDROID_HOME:="${HOME}/lib/android-sdk"}
-if [ ! -d "$NDK" ]; then echo 'ERROR: $NDK not defined as pointing at a directory - define it pointing at a android NDK installation!'; exit 1; fi
+: ${NDK:="${HOME}/lib/android-ndk"}
 : ${TERMUX_MAKE_PROCESSES:='4'}
-: ${TERMUX_TOPDIR:="$HOME/termux"}
-: ${TERMUX_ARCH:="arm"} # (arm|aarch64|i686|x86_64) - the x86_64 arch is not yet used or tested.
-TERMUX_ARCH_BITS="32"
-if [ "x86_64" = $TERMUX_ARCH -o "aarch64" = $TERMUX_ARCH ]; then
-       TERMUX_ARCH_BITS="64"
-fi
+: ${TERMUX_TOPDIR:="$HOME/.termux-build"}
+: ${TERMUX_ARCH:="aarch64"} # (arm|aarch64|i686|x86_64) - the x86_64 arch is not yet used or tested.
 : ${TERMUX_CLANG:=""} # Set to non-empty to use clang.
-: ${TERMUX_HOST_PLATFORM:="${TERMUX_ARCH}-linux-android"}
-if [ $TERMUX_ARCH = "arm" ]; then TERMUX_HOST_PLATFORM="${TERMUX_HOST_PLATFORM}eabi"; fi
 : ${TERMUX_PREFIX:='/data/data/com.termux/files/usr'}
 : ${TERMUX_ANDROID_HOME:='/data/data/com.termux/files/home'}
 : ${TERMUX_DEBUG:=""}
 : ${TERMUX_PROCESS_DEB:=""}
 : ${TERMUX_API_LEVEL:="21"}
+: ${TERMUX_ANDROID_BUILD_TOOLS_VERSION:="23.0.3"}
+: ${TERMUX_NDK_VERSION:="11"}
+
+# Handle command-line arguments:
+show_usage () {
+    echo "Usage: ./build-package.sh [-a ARCH] PACKAGE"
+    echo "Build a package."
+    echo ""
+    exit 1
+}
+while getopts :a:h option
+do
+    case "$option" in
+        a) TERMUX_ARCH="$OPTARG";;
+        h) show_usage;;
+        ?) echo "./build-package.sh: illegal option -$OPTARG"; exit 1;;
+    esac
+done
+shift $(($OPTIND-1))
+if [ "$#" -ne 1 ]; then show_usage; fi
+
+# Check the NDK:
+if [ ! -d "$NDK" ]; then
+       echo 'ERROR: $NDK not defined as pointing at a directory - define it pointing at a android NDK installation!'
+       exit 1
+fi
+if grep -s -q "Pkg.Revision = $TERMUX_NDK_VERSION" $NDK/source.properties; then
+       :
+else
+       echo "Wrong NDK version - we need $TERMUX_NDK_VERSION"
+       exit 1
+fi
+
+# Compute standalone toolchain dir, bitness of arch and name of host platform:
+TERMUX_STANDALONE_TOOLCHAIN="$TERMUX_TOPDIR/_lib/android-standalone-toolchain-${TERMUX_ARCH}-api${TERMUX_API_LEVEL}-"
 if [ "$TERMUX_CLANG" = "" ]; then
-       : ${TERMUX_STANDALONE_TOOLCHAIN:="$HOME/lib/android-standalone-toolchain-${TERMUX_ARCH}-api${TERMUX_API_LEVEL}-gcc4.9"}
+       TERMUX_STANDALONE_TOOLCHAIN+="gcc4.9"
 else
-       : ${TERMUX_STANDALONE_TOOLCHAIN:="$HOME/lib/android-standalone-toolchain-${TERMUX_ARCH}-api${TERMUX_API_LEVEL}-clang38"}
+       TERMUX_STANDALONE_TOOLCHAIN+="clang38"
 fi
-: ${TERMUX_ANDROID_BUILD_TOOLS_VERSION:="23.0.3"}
+if [ "x86_64" = $TERMUX_ARCH -o "aarch64" = $TERMUX_ARCH ]; then
+       TERMUX_ARCH_BITS=64
+else
+       TERMUX_ARCH_BITS=32
+fi
+TERMUX_HOST_PLATFORM="${TERMUX_ARCH}-linux-android"
+if [ $TERMUX_ARCH = "arm" ]; then TERMUX_HOST_PLATFORM="${TERMUX_HOST_PLATFORM}eabi"; fi
+
+# Check the package to build:
+TERMUX_PKG_NAME=`basename $1`
+export TERMUX_SCRIPTDIR=`cd $(dirname $0); pwd`
+if [[ $1 == *"/"* ]]; then
+  # Path to directory which may be outside this repo:
+  if [ ! -d $1 ]; then echo "ERROR: '$1' seems to be a path but is not a directory"; exit 1; fi
+  export TERMUX_PKG_BUILDER_DIR=`realpath $1`
+else
+  # Package name:
+  export TERMUX_PKG_BUILDER_DIR=$TERMUX_SCRIPTDIR/packages/$TERMUX_PKG_NAME
+fi
+TERMUX_PKG_BUILDER_SCRIPT=$TERMUX_PKG_BUILDER_DIR/build.sh
+if test ! -f $TERMUX_PKG_BUILDER_SCRIPT; then
+       echo "ERROR: No build.sh script at supposed package dir $TERMUX_PKG_BUILDER_DIR!"
+       exit 1
+fi
+
+# Handle 'all' arch:
+if [ $TERMUX_ARCH = 'all' ]; then
+       for arch in 'arm' 'i686' 'aarch64'; do
+               ./build-package.sh -a $arch $1
+       done
+       exit
+fi
+
+echo "termux - building $1 for arch $TERMUX_ARCH..."
+test -t 1 && printf "\033]0;$1...\007"
+
 # We do not put all of build-tools/$TERMUX_ANDROID_BUILD_TOOLS_VERSION/ into PATH
 # to avoid stuff like arm-linux-androideabi-ld there to conflict with ones from
 # the standalone toolchain.
@@ -62,15 +107,6 @@ test `uname` = "Darwin" && TERMUX_TAR=gnutar
 export TERMUX_TOUCH="touch"
 test `uname` = "Darwin" && TERMUX_TOUCH=gtouch
 
-# Compute NDK version. We remove the first character (the r in e.g. r9d) to get a version number which can be used in packages):
-export TERMUX_NDK_VERSION=11
-if grep -s -q "Pkg.Revision = $TERMUX_NDK_VERSION" $NDK/source.properties; then
-       :
-else
-       echo "Wrong NDK version - we need $TERMUX_NDK_VERSION"
-       exit 1
-fi
-
 export prefix=${TERMUX_PREFIX} # prefix is used by some makefiles
 #export ACLOCAL="aclocal -I $TERMUX_PREFIX/share/aclocal"
 export AR=$TERMUX_HOST_PLATFORM-ar
@@ -113,6 +149,11 @@ elif [ $TERMUX_ARCH = "i686" ]; then
 elif [ $TERMUX_ARCH = "aarch64" ]; then
        LDFLAGS+=" -Wl,-rpath-link,$TERMUX_PREFIX/lib"
        LDFLAGS+=" -Wl,-rpath-link,$TERMUX_STANDALONE_TOOLCHAIN/sysroot/usr/lib"
+elif [ $TERMUX_ARCH = "x86_64" ]; then
+       continue
+else
+       echo "Error: Invalid arch '$TERMUX_ARCH' - support arches are 'arm', 'i686', 'aarch64', 'x86_64'"
+       exit 1
 fi
 
 if [ -n "$TERMUX_DEBUG" ]; then
@@ -153,8 +194,7 @@ if [ ! -d $TERMUX_STANDALONE_TOOLCHAIN ]; then
        for f in $TERMUX_SCRIPTDIR/ndk_patches/*.patch; do
                sed "s%\@TERMUX_PREFIX\@%${TERMUX_PREFIX}%g" $f | \
                        sed "s%\@TERMUX_HOME\@%${TERMUX_ANDROID_HOME}%g" | \
-                       patch -p1;
-               echo "PATCHING FILE $f done!"
+                       patch --silent -p1;
        done
         # elf.h is taken from glibc since the elf.h in the NDK is lacking.
        # sysexits.h is header-only and used by a few programs.
@@ -162,8 +202,8 @@ if [ ! -d $TERMUX_STANDALONE_TOOLCHAIN ]; then
 fi
 
 export TERMUX_COMMON_CACHEDIR="$TERMUX_TOPDIR/_cache"
-export TERMUX_COMMON_DEBDIR="$TERMUX_TOPDIR/_deb"
-mkdir -p $TERMUX_COMMON_CACHEDIR $TERMUX_COMMON_DEBDIR
+export TERMUX_DEBDIR="$TERMUX_SCRIPTDIR/debs"
+mkdir -p $TERMUX_COMMON_CACHEDIR $TERMUX_DEBDIR
 
 TERMUX_PKG_BUILDDIR=$TERMUX_TOPDIR/$TERMUX_PKG_NAME/build
 TERMUX_PKG_CACHEDIR=$TERMUX_TOPDIR/$TERMUX_PKG_NAME/cache
@@ -206,8 +246,6 @@ if [ -f "${TERMUX_ARCH_FILE}" ]; then
                 mkdir -p $TERMUX_DATA_BACKUPDIRS
                 TERMUX_DATA_PREVIOUS_BACKUPDIR=$TERMUX_DATA_BACKUPDIRS/$TERMUX_PREVIOUS_ARCH
                 TERMUX_DATA_CURRENT_BACKUPDIR=$TERMUX_DATA_BACKUPDIRS/$TERMUX_ARCH
-                echo "NOTE: Different archs - building for $TERMUX_ARCH, but current $TERMUX_PREVIOUS_ARCH"
-                echo "      Saving current /data/data to $TERMUX_DATA_PREVIOUS_BACKUPDIR"
                 # Save current /data (removing old backup if any)
                if test -e $TERMUX_DATA_PREVIOUS_BACKUPDIR; then
                        echo "ERROR: Directory already exists"
@@ -216,7 +254,6 @@ if [ -f "${TERMUX_ARCH_FILE}" ]; then
                 mv /data/data $TERMUX_DATA_PREVIOUS_BACKUPDIR
                 # Restore new one (if any)
                 if [ -d $TERMUX_DATA_CURRENT_BACKUPDIR ]; then
-                        echo "      Restoring old backupdir from $TERMUX_DATA_CURRENT_BACKUPDIR"
                         mv $TERMUX_DATA_CURRENT_BACKUPDIR /data/data
                 fi
         fi
@@ -342,7 +379,7 @@ termux_step_patch_package () {
        for patch in $TERMUX_PKG_BUILDER_DIR/*.patch{$TERMUX_ARCH_BITS,}; do
                test -f $patch && sed "s%\@TERMUX_PREFIX\@%${TERMUX_PREFIX}%g" $patch | \
                        sed "s%\@TERMUX_HOME\@%${TERMUX_ANDROID_HOME}%g" | \
-                       patch -p1
+                       patch --silent -p1
        done
 
        find . -name config.sub -exec chmod u+w '{}' \; -exec cp $TERMUX_COMMON_CACHEDIR/config.sub '{}' \;
@@ -384,9 +421,6 @@ termux_step_configure () {
        for f in $TERMUX_PREFIX/bin/*config; do
                test -f $f && cp $f $TERMUX_PKG_TMPDIR/config-scripts
        done
-       set +e +o pipefail
-       find $TERMUX_PKG_TMPDIR/config-scripts | xargs file | grep -F " script" | cut -f 1 -d : | xargs sed -i -E "s@^#\!/system/bin/sh@#\!/bin/sh@"
-       set -e -o pipefail
        export PATH=$TERMUX_PKG_TMPDIR/config-scripts:$PATH
 
        # See http://wiki.buici.com/xwiki/bin/view/Programing+C+and+C%2B%2B/Autoconf+and+RPL_MALLOC
@@ -529,7 +563,6 @@ termux_step_massage () {
                SUB_PKG_NAME=`basename $subpackage .subpackage.sh`
                 # Default value is same as main package, but sub package may override:
                 TERMUX_SUBPKG_PLATFORM_INDEPENDENT=$TERMUX_PKG_PLATFORM_INDEPENDENT
-               echo "$SUB_PKG_NAME => $subpackage"
                 SUB_PKG_DIR=$TERMUX_TOPDIR/$TERMUX_PKG_NAME/subpackages/$SUB_PKG_NAME
                 TERMUX_SUBPKG_DEPENDS=""
                TERMUX_SUBPKG_CONFLICTS=""
@@ -572,7 +605,7 @@ HERE
                $TERMUX_TAR -cJf $SUB_PKG_PACKAGE_DIR/control.tar.xz .
 
                 # Create the actual .deb file:
-                TERMUX_SUBPKG_DEBFILE=$TERMUX_COMMON_DEBDIR/${SUB_PKG_NAME}_${TERMUX_PKG_FULLVERSION}_${SUB_PKG_ARCH}.deb
+                TERMUX_SUBPKG_DEBFILE=$TERMUX_DEBDIR/${SUB_PKG_NAME}_${TERMUX_PKG_FULLVERSION}_${SUB_PKG_ARCH}.deb
                ar cr $TERMUX_SUBPKG_DEBFILE \
                                   $TERMUX_COMMON_CACHEDIR/debian-binary \
                                   $SUB_PKG_PACKAGE_DIR/control.tar.xz \
@@ -652,7 +685,7 @@ termux_step_post_extract_package
 if [ "x$TERMUX_PKG_HOSTBUILD" != "x" ]; then
        cd $TERMUX_PKG_SRCDIR
        for patch in $TERMUX_PKG_BUILDER_DIR/*.patch.beforehostbuild; do
-               test -f $patch && sed "s%\@TERMUX_PREFIX\@%${TERMUX_PREFIX}%g" $patch | patch -p1
+               test -f $patch && sed "s%\@TERMUX_PREFIX\@%${TERMUX_PREFIX}%g" $patch | patch --silent -p1
        done
 
         if [ -f "$TERMUX_PKG_HOSTBUILD_DIR/TERMUX_BUILT_FOR_$TERMUX_PKG_VERSION" ]; then
@@ -770,7 +803,7 @@ termux_step_create_debscripts
 # Create control.tar.xz
 $TERMUX_TAR -cJf $TERMUX_PKG_PACKAGEDIR/control.tar.xz .
 # In the .deb ar file there should be a file "debian-binary" with "2.0" as the content:
-TERMUX_PKG_DEBFILE=$TERMUX_COMMON_DEBDIR/${TERMUX_PKG_NAME}_${TERMUX_PKG_FULLVERSION}_${TERMUX_ARCH}.deb
+TERMUX_PKG_DEBFILE=$TERMUX_DEBDIR/${TERMUX_PKG_NAME}_${TERMUX_PKG_FULLVERSION}_${TERMUX_ARCH}.deb
 # Create the actual .deb file:
 ar cr $TERMUX_PKG_DEBFILE \
                    $TERMUX_COMMON_CACHEDIR/debian-binary \

diff --git a/clean-rebuild-all.sh b/clean-rebuild-all.sh
index 3fac22c..8970f09 100755 (executable)
--- a/clean-rebuild-all.sh
+++ b/clean-rebuild-all.sh
@@ -1,5 +1,9 @@
 #!/bin/sh
 # clean-rebuild-all.sh - clean everything and rebuild
 
-rm -Rf /data/* $HOME/termux/* $HOME/lib/android-standalone-toolchain-*
+# Read settings from .termuxrc if existing
+test -f $HOME/.termuxrc && . $HOME/.termuxrc
+: ${TERMUX_TOPDIR:="$HOME/.termux-build"}
+
+rm -Rf /data/* $TERMUX_TOPDIR
 bash -x build-all.sh

diff --git a/scripts/run-docker.sh b/scripts/run-docker.sh
index 5e2ab67..d14127d 100755 (executable)
--- a/scripts/run-docker.sh
+++ b/scripts/run-docker.sh
@@ -1,15 +1,28 @@
 #!/bin/sh
 set -e -u
 
-# Create build output folder if necessary:
-mkdir -p $HOME/termux
+# Read settings from .termuxrc if existing
+test -f $HOME/.termuxrc && . $HOME/.termuxrc
+: ${TERMUX_TOPDIR:="$HOME/.termux-build"}
 
 IMAGE_NAME=termux/package-builder
+CONTAINER_NAME=termux-package-builder
 
-echo "Running container from image '$IMAGE_NAME'..."
+echo "Running container '$CONTAINER_NAME' from image '$IMAGE_NAME'..."
+
+docker start $CONTAINER_NAME > /dev/null 2> /dev/null || {
+       echo "Creating new container..."
+       docker run \
+               -d \
+               --name $CONTAINER_NAME \
+               -v $PWD:/root/termux-packages \
+               -t $IMAGE_NAME
+}
+
+if [ "$#" -eq  "0" ]; then
+       docker exec -it $CONTAINER_NAME bash
+else
+       docker exec -it $CONTAINER_NAME $@
+fi
 
-docker run \
-       -v $PWD:/root/termux-packages \
-       -v $HOME/termux:/root/termux \
-       -ti $IMAGE_NAME bash
 

diff --git a/scripts/update-docker.sh b/scripts/update-docker.sh
new file mode 100755 (executable)
index 0000000..ef46f25
--- /dev/null
+++ b/scripts/update-docker.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+set -e -u
+
+CONTAINER=termux-package-builder
+IMAGE=termux/package-builder
+
+docker pull $IMAGE
+
+LATEST=`docker inspect --format "{{.Id}}" $IMAGE`
+RUNNING=`docker inspect --format "{{.Image}}" $CONTAINER`
+
+if [ $LATEST = $RUNNING ]; then
+       echo "Image '$IMAGE' used in the container '$CONTAINER' is already up to date"
+else
+       echo "Image '$IMAGE' used in the container '$CONTAINER' has been updated - removing the outdated container"
+       docker stop $CONTAINER
+       docker rm -f $CONTAINER
+fi
+