From 43c6a1c73ed18cea3c0dedcc2e81a5b7a3d85406 Mon Sep 17 00:00:00 2001
From: torben
Date: Thu, 10 Dec 2015 16:55:37 +0100
Subject: More fakechroot features.

---
 builder/build-initramfs.sh | 76 +++++++++++++++++++++++++++++-----------------
 1 file changed, 48 insertions(+), 28 deletions(-)

(limited to 'builder/build-initramfs.sh')

diff --git a/builder/build-initramfs.sh b/builder/build-initramfs.sh
index f4e7f699..dc56def6 100755
--- a/builder/build-initramfs.sh
+++ b/builder/build-initramfs.sh
@@ -3,16 +3,14 @@
 
 # region header
 
-# Copyright Torben Sickert (t.sickert["~at~"]gmail.com) 29.10.2015
+# Copyright Torben Sickert (info["~at~"]torben.website) 29.10.2015
 #           Janosch Dobler (TODO) 29.10.2015
 
 # License
 # -------
-
 # This library written by Torben Sickert and Janosch Dobler stand under a
 # creative commons naming 3.0 unported license.
 # see http://creativecommons.org/licenses/by/3.0/deed.de
-
 # This tool provides a generic way to install systemd based remote linux
 # initramfs.
 
@@ -52,10 +50,7 @@
 #                   as file name) for lines containing a match to the given
 #                   PATTERN. By default, grep prints the matching lines.
 
-# endregion
-
-# region ensure presence of needed dependencies
-
+## region ensure presence of needed dependencies
 set -o errexit
 build_initramfs__needed_location="$(dirname "${BASH_SOURCE[0]}")/dnbd3-rootfs"
 if ! [[ -d "$build_initramfs__needed_location" ]]; then
@@ -76,20 +71,19 @@ if ! [[ -d "$build_initramfs__needed_location" ]]; then
     rm --recursive --force "$build_initramfs__temporary_repository_location"
 fi
 set +o errexit
-
-# endregion
+## endregion
 
 source "$(dirname "${BASH_SOURCE[0]}")/dnbd3-rootfs/scripts/rebash/core.sh"
 core.import exceptions
 exceptions.activate
 core.import logging
 core.import utils
+# endregion
 
 logging.set_commands_log_level debug
 logging.set_log_level critical
 
 # region properties
-
 build_initramfs_dracut_parameter='--force --no-hostonly'
 build_initramfs_verbose='no'
 build_initramfs_debug='no'
@@ -97,14 +91,11 @@ build_initramfs_target=''
 build_initramfs_create_system_image=''
 build_initramfs_cleanup='no'
 build_initramfs_dependencies=(bash cpio git test shift echo mktemp cat rm sed \
-    gzip curl tar grep make gcc cmake readlink dirname dmsetup fakeroot)
-
+    gzip curl tar grep make gcc cmake readlink dirname dmsetup fakeroot \
+    fakechroot chroot qemu-nbd)
 # endregion
-
 # region functions
-
 ## region command line interface
-
 function build_initramfs_print_usage_message() {
     # Prints a description about how to use this program.
     logging.cat << EOF
@@ -221,7 +212,7 @@ function build_initramfs_parse_command_line() {
 }
 
 ## endregion
-
+## region helper
 function build_initramfs_initialize_dracut() {
     # Downloads and compiles dracut.
     #
@@ -271,13 +262,10 @@ function build_initramfs_cleanup() {
     clean
     return $?
 }
-
+## endregion
 # endregion
-
 # region controller
-
-# TODO handle fakeroot target feature.
-
+## region dependency checks
 utils.dependency_check "${build_initramfs_dependencies[*]}"
 # TODO check for existing kernel headers.
 # Find lib locations: $(gcc -print-prog-name=cc1plus) -v
@@ -289,15 +277,48 @@ if ! ldconfig --print-cache | grep libz.so; then
     logging.critical "You have to install the compression library \"libz\". Otherwise we aren't able to compile dnbd3 for your kernel."
     exit 1
 fi
+## endregion
 if ! build_initramfs_parse_command_line "$@"; then
     build_initramfs_print_help_message "$0"
     exit 1
 fi
+## region handle delegated operations to specified target
+if [[ "$build_initramfs_target" != '' ]]; then
+    build_initramfs__target="$build_initramfs_target"
+    if [[ -f "$build_initramfs_target" ]]; then
+        build_initramfs__target="$(mktemp --directory)"
+        # TODO
+        #qemu-nbd "$build_initramfs_target" "$build_initramfs__target"
+    fi
+    if [[ -d "$build_initramfs__target" ]]; then
+        build_initramfs__temporary_working_directory="${build_initramfs__target:0:-1}$(fakeroot \
+            fakechroot chroot "$build_initramfs__target" mktemp --directory)"
+        mount --bind "$(pwd)" "$build_initramfs__temporary_working_directory"
+        build_initramfs__parameter_skip=false
+        build_initramfs__parameter_to_forward=()
+        for build_initramfs__parameter; do
+            if $build_initramfs__parameter_skip; then
+                build_initramfs__parameter_skip=false
+            elif [[ "$build_initramfs__parameter" == '-t' ]] || \
+                 [[ "$build_initramfs__parameter" == '--target' ]]
+            then
+                build_initramfs__parameter_skip=true
+            else
+                build_initramfs__parameter_to_forward+=("$build_initramfs__parameter")
+            fi
+        done
+        "${build_initramfs__temporary_working_directory}/${BASH_SOURCE[0]}" ${build_initramfs__parameter_to_forward[*]}
+    fi
+    exit 0
+fi
+## endregion
+## region handle dependencies which can be resolved automatically
 logging.info 'Checking dracut.'
 if ! [[ -d "$(dirname "${BASH_SOURCE[0]}")/dracut" ]]; then
     logging.info "Dracut isn't available yet loading it."
     build_initramfs_initialize_dracut
 fi
+
 build_initramfs__dracut_modules_source='../../dnbd3-rootfs'
 build_initramfs__dracut_modules_target="$(dirname "${BASH_SOURCE[0]}")/dracut/modules.d/90dnbd3-rootfs"
 if [[ ! -L "$build_initramfs__dracut_modules_target" || "$(readlink \
@@ -313,6 +334,8 @@ then
     # ...     "$(basename "$build_initramfs__dracut_modules_source")" \
     # ...     "$build_initramfs__dracut_modules_target"
 fi
+## endregion
+## region prepare and perform final dracut call
 build_initramfs__loglevel=''
 if [ "$build_initramfs_verbose" == 'yes' ]; then
     build_initramfs__loglevel='--verbose'
@@ -334,18 +357,15 @@ else
     # NOTE: We deactivate our exception handle since dracut returns "1" if it
     # is launched with help parameter ("-h" or "--help").
     exceptions.deactivate
-    dracut/dracut.sh --local $build_initramfs__loglevel --modules \
-        "$build_initramfs__modules" ${build_initramfs_dracut_parameter[*]} \
-        /boot/initramfs-test.img
+    "$(dirname "${BASH_SOURCE[0]}")/dracut/dracut.sh" --local \
+        $build_initramfs__loglevel --modules "$build_initramfs__modules" \
+        ${build_initramfs_dracut_parameter[*]} /boot/initramfs-test.img
     exceptions.activate
 fi
 exceptions.deactivate
-
+## endregion
 # endregion
-
 # region vim modline
-
 # vim: set tabstop=4 shiftwidth=4 expandtab:
 # vim: foldmethod=marker foldmarker=region,endregion:
-
 # endregion
-- 
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