refactor(mkdockerbuild): extracts common parts (#24)

* fixes mount of project in wrapper scripts, when not running in container

* refactors makefile in preparation to extract common parts

* refactors makefiles and scripts

* fix git ignore matches

* adds support to disable fetch

* update

* fixes docker warning about unused build argument

* adds support to force offline build

fixes shell escaping
changes paths to relative where possible

* moves make docker builder support files

* removes unnecessary configuration elements

* fixes initial download directory creation

* adds missing rule for initial download directory creation

* fixes docker error: unable to prepare context

copies dockerfile to build context, in order to remove dependency to
unsupported/new docker feature

build/mkdocker/bin/cmake_discover_cc_settings.sh

@@ -0,0 +1,57 @@
+#!/bin/sh
+
+set -e
+
+export LANG=C
+export LC_ALL=C
+
+cleanup() {
+  rm -rf "$INCLUDE_DIRS_TMPFILE"
+}
+
+trap cleanup TERM INT EXIT
+
+DEST="${DEST:-$PWD}"
+
+CMAKE_CACHE_FILE="${1:-CMakeCache.txt}"
+CMAKE_CXX_COMPILER="$(sed -n -e 's/CMAKE_CXX_COMPILER:FILEPATH=\(.*\)$/\1/p' "$CMAKE_CACHE_FILE")"
+CMAKE_C_COMPILER="$(sed -n -e 's/CMAKE_C_COMPILER:FILEPATH=\(.*\)$/\1/p' "$CMAKE_CACHE_FILE")"
+
+INCLUDE_DIRS_PREFIX="${2:-$DEST}"
+INCLUDE_DIRS_TMPFILE="$(mktemp -p "$DEST" include_dirs_XXXXXXXXXX.txt)"
+INCLUDE_DIRS_FILE="${INCLUDE_DIRS_FILE:-$DEST/include_dirs.txt}"
+
+C_BUILTIN_FILE="${C_BUILTIN_FILE:-$DEST/builtins.h}"
+CXX_BUILTIN_FILE="${CXX_BUILTIN_FILE:-$DEST/builtins.hpp}"
+
+if [ -z "${RSYNC+x}" ]; then
+  RSYNC=rsync
+fi
+
+{
+  {
+    echo | "$CMAKE_CXX_COMPILER" -xc++ -E -Wp,-v - 2>&1;
+    echo | "$CMAKE_C_COMPILER" -xc -E -Wp,-v - 2>&1;
+  } \
+  | sed -n -e 's/\s\+\(\/.*$\).*/\1/p';
+  
+  sed -n -e 's/.*_INCLUDE_DIRS:INTERNAL=\(.*\)$/\1/p' "$CMAKE_CACHE_FILE";
+} \
+| sed 's/;/\n/g' |  sed '/^$/d' | sort -u 2>/dev/null 1> "$INCLUDE_DIRS_TMPFILE"
+
+{
+  echo '#include <...> search starts here:'
+  # shellcheck disable=SC1117
+  sed -n -e "s@\(.*\)@$INCLUDE_DIRS_PREFIX\1@p" "$INCLUDE_DIRS_TMPFILE"
+  echo 'End of search list.'
+} > "$INCLUDE_DIRS_FILE"
+
+if [ -n "$RSYNC" ]; then
+  "$RSYNC" -arR --files-from="$INCLUDE_DIRS_TMPFILE" / "$DEST"
+  echo "Include folders copied to $DEST" >&2
+fi
+
+"$CMAKE_C_COMPILER" -xc -dM -E - < /dev/null > "$C_BUILTIN_FILE"
+echo "C Compiler built-ins written to $C_BUILTIN_FILE" >&2
+"$CMAKE_CXX_COMPILER" -xc++ -dM -E - < /dev/null > "$CXX_BUILTIN_FILE"
+echo "C++ Compiler built-ins written to $CXX_BUILTIN_FILE" >&2

build/mkdocker/bin/docker_compose.sh

@@ -0,0 +1,56 @@
+#!/bin/sh
+
+set -e
+
+DOCKER="${DOCKER:-docker}"
+DOCKER_HOST="${DOCKER_HOST:-/var/run/docker.sock}"
+VERSION="${VERSION:-1.24.0}"
+IMAGE="${IMAGE:-${REGISTRY_PREFIX}docker/compose:${VERSION}}"
+NETWORK="${NETWORK:-host}"
+USERID="${USERID:-$(id -u)}"
+SCRIPTDIR="${SCRIPTDIR:-"$(cd "$(dirname "$0")" && echo "$PWD")"}"
+PROJECTDIR="${PROJECTDIR:-"$PWD"}"
+ENTRYPOINT="${ENTRYPOINT:-docker-compose}"
+HOST_ENVFILTER="${HOST_ENVFILTER:-^DOCKER_\|^COMPOSE_}"
+PATH="${SCRIPTDIR}:$PATH"
+
+set -- --entrypoint "$ENTRYPOINT" "$IMAGE" "$@"
+set -- --user "$USERID:$USERID" --network "$NETWORK" --workdir "$PWD" "$@"
+
+ENVFLAGS="$(printenv | grep -e "$HOST_ENVFILTER" | sed -n -e 's/\([^=]*\)=.*/-e \1/p')" || true
+#shellcheck disable=SC2086
+set -- $ENVFLAGS "$@"
+
+if [ -n "$CONTAINER_CGROUP_PARENT" ]; then
+  set -- --cgroup-parent "$CONTAINER_CGROUP_PARENT" "$@"
+fi
+
+HOST_CONTAINER="${HOST_CONTAINER:-"$(get_container_id.sh)"}" || true
+if [ -n "$HOST_CONTAINER" ]; then
+  set -- --volumes-from "$HOST_CONTAINER" "$@"
+else
+  set -- --volume "$PROJECTDIR:$PROJECTDIR:cached" "$@"
+fi
+
+# setup options for connection to docker host
+if [ -S "$DOCKER_HOST" ]; then
+  DOCKER_SOCK_GROUP="$(stat -c '%g' "$DOCKER_HOST")"
+  set -- -e DOCKER_SOCK_GROUP="$DOCKER_SOCK_GROUP" --group-add "$DOCKER_SOCK_GROUP" "$@"
+else
+  set -- -e DOCKER_HOST -e DOCKER_TLS_VERIFY -e DOCKER_CERT_PATH "$@"
+fi
+
+if [ -t 0 ] && ! is_running_in_bg.sh $$; then
+  set -- --interactive "$@"
+fi
+
+# if STDIN piped or redirected
+if [ -p /dev/stdin ] || { [ ! -t 0 ] && [ ! -p /dev/stdin ]; }; then
+  set -- --interactive "$@"
+elif [ -t 1 ]; then
+  set -- --tty "$@"
+fi
+
+set -- --rm "$@"
+
+exec "$DOCKER" run "$@"

build/mkdocker/bin/get_container_id.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+set -e
+
+container_id() {
+  if [ "$#" -le 0 ]; then
+    # shellcheck disable=SC2119
+    container_id_by_cgroup
+  else
+    "$DOCKER" inspect --format='{{.Id}}' "$@"
+  fi
+}
+
+# shellcheck disable=SC2120
+container_id_by_cgroup() {
+  impl_container_id_by_cgroup "$@" || return "$?"
+}
+
+impl_container_id_by_cgroup() {
+  file="${1:-/proc/self/cgroup}"
+
+  while IFS= read -r cmd; do
+    id="$(echo "$cmd" | sed -n -e 's/[^:]*:[^:]*:.*\/\([0-9a-fA-F]\+\)$/\1/p')"
+    if container_id "$id" >/dev/null 2>&1; then
+      echo "$id"
+      return 0
+    fi
+  done < "$file"
+
+  return 1
+}
+
+DOCKER="${DOCKER:-docker}"
+
+if [ -z "${CONTAINER+x}" ] && [ -n "$DOCKER" ]; then
+  CONTAINER="$(container_id "$@")"
+fi
+
+echo "$CONTAINER"

build/mkdocker/bin/get_source_date_epoch.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+set -e
+
+export LANG=C
+export LC_ALL=C
+
+[ -n "$TOPDIR" ] && cd "$TOPDIR"
+
+try_git() {
+  [ -e .git ] || return 1
+  SOURCE_DATE_EPOCH="$(git log -1 --format=format:%ct)"
+  [ -n "$SOURCE_DATE_EPOCH" ]
+}
+
+try_svn() {
+  [ -d .svn ] || return 1
+  SOURCE_DATE_EPOCH="$(date -d "$(svn info | sed -n -e 's/^Last Changed Date: //p')" +%s)"
+  [ -n "$SOURCE_DATE_EPOCH" ]
+}
+
+try_hg() {
+  [ -d .hg ] || return 1
+  SOURCE_DATE_EPOCH="$(hg log --template '{date}' -l 1 | cut -d. -f1)"
+  [ -n "$SOURCE_DATE_EPOCH" ]
+}
+
+try_mtime() {
+  perl -e 'print((stat $ARGV[0])[9])' "$0"
+  [ -n "$SOURCE_DATE_EPOCH" ]
+}
+
+try_git || try_svn || try_hg || try_mtime || SOURCE_DATE_EPOCH=""
+echo "$SOURCE_DATE_EPOCH"

build/mkdocker/bin/is_running_in_bg.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+set -e
+
+running_in_background() {
+  pid="$1"
+  
+  case "$("$PS" -o stat= -p "$pid" 2>/dev/null || echo '+')" in
+  *+*) ;;
+  *)   return 0 ;;
+  esac
+  
+  return 1
+}
+
+PS="${PS:-ps}"
+
+running_in_background "$@"