enhanced build in docker

build-in-docker.sh

@@ -2,11 +2,11 @@
 
 # build and test everything in a fresh docker installation
 img="ubuntu:latest"
-repos=""
-keys=""
-envs=""
-dirs="-v $(pwd):/workdir"
-packages=""
+repos=()
+keys=()
+envs=()
+dirs=("-v $(pwd):/workdir")
+packages=()
 targets="all check distcheck"
 commands=()
 if test -e ./build-in-docker.conf; then
@@ -20,6 +20,7 @@ while test $# -gt 0; do
             echo "$0 [OPTIONS]"
             echo
             echo "OPTIONS:"
+            echo
             echo "  -h, --help            show this help"
             echo "  -i, --image <image>   use given docker image instead of ${img}"
             echo "  -t, --targets targets specify build targets, default: ${targets}"
@@ -28,7 +29,20 @@ while test $# -gt 0; do
             echo "  -e, --env <var>=<val> set environment variable in docker"
             echo "  -d, --dir <dir>       access given directory read only"
             echo "  -p, --package <pkg>   install extra debian packages"
-            echo "  -x, --exe <command>   execute commands as root in docker"
+            echo "  -c, --cmd <command>   execute commands as root in docker"
+            echo
+            echo "  The options -r -k -e -d -p -c can be repeated several times."
+            echo
+            echo "  The options -r -p -c allow an if-then-else contruct"
+            echo "  depending on the operating system:"
+            echo "    <os>:::<A>:::<B>"
+            echo "    <os>:::<A>"
+            echo "  Read as: On linux type <os> use <A> else use <B>"
+            echo "  That means: If the distributer ID or codename in lsb_release"
+            echo "  matches <os>, then <A> is replaced, else <B> is replaced."
+            echo "  The three colons are for splitting <os> from <A> and <B> part."
+            echo "  E.g.: Install package curl on wheezy and npm on olter systems:"
+            echo "    $0 -p wheezy:::curl:::npm"
             echo
             echo "EXAMPLE:"
             echo
@@ -50,21 +64,21 @@ while test $# -gt 0; do
             targets="$1"
             ;;
         (-r|--repo) shift;
-            repos+=" $1"
+            repos+=("$1")
             ;;
         (-k|--key) shift;
-            keys+=" $1"
+            keys+=("$1")
             ;;
         (-e|--env) shift;
-            envs+=" -e $1"
+            envs+=("-e $1")
             ;;
         (-d|--dirs) shift;
-            dirs+=" -v $1:$1:ro"
+            dirs+=("-v $1:$1:ro")
             ;;
         (-p|--package) shift;
-            packages+=" $1"
+            packages+=("$1")
             ;;
-        (-x|--exe) shift;
+        (-c|--cmd) shift;
             commands+=("$1")
             ;;
         (*)
@@ -79,28 +93,47 @@ while test $# -gt 0; do
     shift
 done
 
+function ifthenelse() {
+    arg="$1"
+    shift
+    cmd="$*"
+    if test "${arg/:::/}" = "${arg}"; then
+        docker exec ${DOCKER_ID} bash -c "${cmd//ARG/${arg}}"
+    else
+        os="${arg%%:::*}"
+        thenpart="${arg#*:::}"
+        if test "${thenpart/:::/}" = "${thenpart}"; then
+            docker exec ${DOCKER_ID} bash -c 'os="'$os'"; if test "${os//$(lsb_release -is)/}${os//$(lsb_release -cs)/}" != "${os}${os}"; then '"${cmd//ARG/${thenpart}}"'; fi'
+        else
+            elsepart="${thenpart##*:::}"
+            thenpart="${thenpart%:::*}"
+            docker exec ${DOCKER_ID} bash -c 'os="'$os'"; if test "${os//$(lsb_release -is)/}${os//$(lsb_release -cs)/}" != "${os}${os}"; then '"${cmd//ARG/${thenpart}}"'; else '"${cmd//ARG/${elsepart}}"'; fi'
+        fi
+    fi
+}
+
 set -x
 
-DOCKER_ID=$(docker run -d ${dirs} ${envs} -w /workdir $img sleep infinity)
+DOCKER_ID=$(docker run -d ${dirs[@]} ${envs[@]} -w /workdir $img sleep infinity)
 trap "docker rm -f ${DOCKER_ID}" INT TERM EXIT
-docker exec ${DOCKER_ID} apt-get install -y software-properties-common apt-transport-https dpkg-dev
-if test -n "${repos}"; then
-    for repo in ${repos}; do
-        docker exec ${DOCKER_ID} apt-add-repository ${repo}
-    done
-fi
-if test -n "${keys}"; then
-    for key in ${keys}; do
-        wget -O- ${key} \
-            | docker exec -i ${DOCKER_ID} apt-key add -
-    done
-fi
 docker exec ${DOCKER_ID} apt-get update
-if test -n "${packages}"; then
-    docker exec -i ${DOCKER_ID} apt-get install -y ${packages}
+docker exec ${DOCKER_ID} apt-get upgrade -y --force-yes
+if ! docker exec ${DOCKER_ID} apt-get install -y --force-yes python-software-properties apt-transport-https dpkg-dev lsb-release; then
+    docker exec ${DOCKER_ID} apt-get install -y --force-yes software-properties-common apt-transport-https dpkg-dev lsb-release
 fi
+for repo in "${repos[@]}"; do
+    ifthenelse "${repo}" "apt-add-repository ARG"
+done
+for key in "${keys[@]}"; do
+    wget -O-  \
+        | docker exec -i ${DOCKER_ID} apt-key add -
+done
+docker exec ${DOCKER_ID} apt-get update
+for package in "${packages[@]}"; do
+    ifthenelse "${package}" "apt-get install -y --force-yes ARG"
+done
 for command in "${commands[@]}"; do
-    docker exec -i ${DOCKER_ID} ${command}
+    ifthenelse "${command}" "ARG"
 done
 docker exec ${DOCKER_ID} ./resolve-debbuilddeps.sh
 docker exec -u $(id -u) ${DOCKER_ID} svn upgrade || true