Merge branch 'issue/601' into 'develop'

SCRUM#602: Several improvements

See merge request !19

.gitignore

 chroot
 overlay
-kernel
 *.swp
-iso/**/*.iso
-src/preseed/.preseed.bkp
-initrd
+cache/*
+iso/*
+initrd/*
 initrd.lz
-chroot*.tar.gz
-packages-needed
-base
-todos.txt
-vmlinuz-*-generic
-initrd.img-*-generic
+.Trash-1000/*
+.vscode/*
\ No newline at end of file

.linter_shell.sh

@@ -18,5 +18,6 @@ echo  -e "$files"| xargs shellcheck -s bash && \
 echo "AWESOME! No problems found." ; \
 exit 0
 #else
-echo -e "Understand errors in: ${BLUE}https://github.com/koalaman/shellcheck/wiki${NC}"
+echo -e "Understand errors in: \
+${BLUE}https://github.com/koalaman/shellcheck/wiki${NC}"
 exit 1

.vscode/settings.json

+{
+        // sulzbach:
+        "editor.rulers": [80],
+        "editor.fontSize": 16
+}
\ No newline at end of file

conf/chroot.conf

+export NO_DBUS=true

conf/debug.conf

+PASSWD="123mudar"
\ No newline at end of file

conf/general.conf

+TMPFS="${PREFIX}/tmp"
+TMPFS_SIZE="6291456k"
+TMP="${TMPFS}/${_PROF}"
+CHROOTDIR="${PREFIX}/overlay"
+SCRIPTSDIR="${PREFIX}/scripts-enabled/${_PROF}"
+ISODIR="${PREFIX}/iso"
+CACHEDIR="${PREFIX}/cache/${_PROF}/${_REPO}"
+PKGLIST="${PREFIX}/pkg-list/${_PROF}"
+SOURCESLIST="${PREFIX}/sources-list"
+LOG_PATH="/var/log/create-iso"

conf/lc6.conf

+NAME="Linux Comunicacoes"
+WEBSITE="https://cidadesdigitais.c3sl.ufpr.br/linux-comunicacoes/"
+ISOURL="http://cdimage.ubuntu.com/ubuntu-gnome/releases/16.04/release"
+KEYURL="http://repo.c3sl.ufpr.br/lc2/lc.c3sl.ufpr.br.key"

conf/le6-netbook.conf

+NAME="Linux Educacional Netbook"
+WEBSITE="https://linuxeducacional.c3sl.ufpr.br"
+ISOURL="http://cdimage.ubuntu.com/ubuntu-gnome/releases/16.04/release"
+KEYURL="http://repo.c3sl.ufpr.br/le6/le.c3sl.ufpr.br.key"

conf/le6.conf

+NAME="Linux Educacional"
+WEBSITE="https://linuxeducacional.c3sl.ufpr.br"
+ISOURL="http://cdimage.ubuntu.com/ubuntu-gnome/releases/16.04/release"
+KEYURL="http://repo.c3sl.ufpr.br/le6/le.c3sl.ufpr.br.key"

conf/le6/testing/create-iso.conf

-SHORTNAME=le6
-TMP=${PREFIX}/${_DIST}
-CHROOTDIR=${PREFIX}/overlay
-TMPFS=${PREFIX}/tmp
-DISTRO=Linux_Educacional_6.1.0
-DPLIST=${PREFIX}/pkg-list/${_DIST}/dependencies.list
-INSTLIST=${PREFIX}/pkg-list/${_DIST}/install.list
-ISOLINUX=${PREFIX}/src/isolinux
-MOUNTLIST=${TMP}/mountlist
-OURSOURCESLIST=${PREFIX}/sources-list/${_DIST}/${SHORTNAME}.list
-RMDSKT=${PREFIX}/pkg-list/${_DIST}/remove-desktop.list
-RMLIST=${PREFIX}/pkg-list/${_DIST}/remove.list
-REPOPKGS=${PREFIX}/pkg-list/${_DIST}/repo-local.list
-SCRIPTSDIR=${PREFIX}/scripts-enabled/${_DIST}
-SOURCESLISTDEFAULT=${PREFIX}/sources-list/${_DIST}/default.list
-SCRIPT_NAME="exec.sh"
-LOG_PATH="/var/log"

conf/opts.conf

+_HELP=false
+_PROF=""
+_INPUT=""
+_OUTPUT=""
+_REPO="stable"
+_VERSION=""
+_DEBUG=false
+_MAIL=false

conf/pre.conf

-_HELP=false
-_DIST=""
-_ARCH="amd64"
-_REPO="stable"

create-iso.sh

@@ -21,129 +21,214 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 # USA.
 
-export PREFIX="${PWD}"
-source "${PREFIX}/conf/pre.conf"
+# Get the prefix path (root) of create-iso
+export PREFIX="$(realpath "$(dirname "$0")")"
+
+# Load default values of parameters
+source "${PREFIX}/conf/opts.conf"
 
 while true; do
     case "${1}" in
-        -h | --help   ) _HELP=true; shift ;;
-        -d | --distro ) _DIST="${2}"; shift; shift ;;
-        -a | --arch   ) _ARCH="${2}"; shift; shift ;;
-        -r | --repo   ) _REPO="${2}"; shift; shift ;;
-        -* )            echo "Unrecognized option. Try with --help."; exit 1 ;;
-        *  )            break ;;
+      -h | --help     ) _HELP=true; break ;;
+      -p | --profile  ) _PROF="$2"; shift; shift ;;
+      -v | --version  ) _VERSION="$2"; shift; shift ;;
+      -i | --input    ) _INPUT="$2"; shift; shift ;;
+      -o | --output   ) _OUTPUT="$2"; shift; shift ;;
+      -r | --repo     ) _REPO="$2"; shift; shift ;;
+      -d | --debug    ) _DEBUG=true; shift ;;
+      -s | --sendmail ) _MAIL=true; shift ;;
+      -*              ) echo "Unrecognized option. Try with --help."; exit 1 ;;
+      *               ) break ;;
     esac
 done
 
-if [ "${_HELP}" = true ]; then
-    echo "Usage: ${0} [OPTION] [ARGUMENT]..."
-    echo ""
-    echo "Examples:"
-    echo "    sudo ${0} --distro le6/testing             # Generate default arch (amd64) le6 iso image"
-    echo "    sudo ${0} -d le6/testing -a i386           # Generate i386 architecture le6 iso image"
-    echo ""
-    echo "Options:"
-    echo "    -h, --help                                 Show this help list"
-    echo "    -d, --distro [DIST]                        Select iso image's distro"
-    echo "    -a, --arch [amd64 | i386]                  Select iso image's architecture"
-    echo "    -r, --repo [stable | testing | unstable]   Select remote repository codename to download packages from"
-    exit 2
+if [[ "${_HELP}" = true ]]; then
+    echo    "Usage: $0 [OPTION] [ARGUMENT] ..."
+    echo    ""
+    echo    "Options:"
+    echo    "  -h, --help                               Show this help list"
+    echo -n "  -p, --profile [PROF]                     Select create-iso "
+    echo    "profile"
+    echo -n "  -v, --version [VERSION]                  Set version of the "
+    echo    "distribution to be built"
+    echo -n "  -i, --input [PATH]                       Select ISO9660 file "
+    echo    "to be used as base"
+    echo -n "  -o, --output [PATH]                      Select output path of "
+    echo    "the created ISO9660 image"
+    echo -n "  -r, --repo [stable | testing | unstable] Select the base remote "
+    echo    "repository of the distribution by codename"
+    echo    "  -d, --debug                              Execute in debug mode"
+
+    exit 0
 fi
 
-if [ -z "${_DIST}" ]; then
-    echo "No distro specified. Try with --help."
-    exit 1
+if [[ "$(id -u)" != "0" ]]; then
+    echo "You must have more power to run this script. Are you root?"
+    exit -1
 fi
 
-if [ "${_ARCH}" != "amd64" ] && [ "${_ARCH}" != "i386" ]; then
-    echo "Unrecognized architecture. Try with --help."
+if [[ -z "${_PROF}" ]]; then
+    echo "No profile specified. Try with --help."
     exit 1
 fi
 
-if [ "${_REPO}" != "stable" ] && [ "${_REPO}" != "testing" ] && [ "${_REPO}" != "unstable" ]; then
-    echo "Unrecognized remote repository codename. Try with --help."
+# Load profile config
+if ! source "${PREFIX}/conf/${_PROF}.conf"; then
+    echo "Unavailable profile. Try with --help." 
     exit 1
 fi
 
-if [ "$(id -u)" != "0" ]; then
-    echo "You must have more power to run this script. Are you root?"
-    exit -1
+# Load generic config
+source "${PREFIX}/conf/general.conf"
+
+if [[ -z "${_VERSION}" ]]; then
+    echo "No version specified. Proceeding with unset version."
+else
+    NAME="${NAME} ${_VERSION}"
 fi
 
-source "${PREFIX}/conf/${_DIST}/create-iso.conf"
+if [[ "${_REPO}" != "stable" ]] && [[ "${_REPO}" != "testing" ]] && \
+[[ "${_REPO}" != "unstable" ]]; then
+    echo "Unrecognized remote repository codename. Try with --help."
+    exit 1
+fi
 
 TIME_STAMP="$(date +'%Y-%m-%dT%H:%M:%S')"
-export LOG_FILE="${LOG_PATH}/create-iso-${TIME_STAMP}.log"
+
+mkdir --parents "${LOG_PATH}"
+export LOG_FILE="${LOG_PATH}/${TIME_STAMP}.log"
 
 exec 1<&-
 exec 2<&-
 exec 1<> "${LOG_FILE}"
 exec 1>&1
-mkdir --parents "${TMP}"
 
-source "${PREFIX}/common.sh"
-source "${PREFIX}/helper/logging.incsh"
-source "${PREFIX}/lib/mktmpfs.sh"
-source "${PREFIX}/lib/overlay.sh"
+source "${PREFIX}/include/base.sh"
+source "${PREFIX}/include/chroot.sh"
+source "${PREFIX}/include/logging.sh"
+source "${PREFIX}/include/mount.sh"
+
+# Disable debug logging if not in debug mode
+[[ "${_DEBUG}" == false ]] && let VERBOSE_FLAGS="${ALL} ^ ${LDEBUG}"
 
 # Installation of create-iso's dependencies
-apt-get install isolinux syslinux squashfs-tools genisoimage xorriso --yes || \
-createIsoLogger --message "Failed to install basic tools" --tag "apt-get"
+apt-get install isolinux syslinux squashfs-tools genisoimage xorriso reprepro \
+binwalk --yes || \
+create_iso_logger --message "Failed to install basic tools" --tag "apt-get"
+
+# The default filename of the generated iso is a concatenation of lowered-cased 
+# hyphen-delimited distribution version, repo codename and timestamp
+[[ -z "${_OUTPUT}" ]] && _OUTPUT="${ISODIR}/output/$(sed -e 's/ /-/g' -e \
+'s/\(.*\)/\L\1/g' <<< "${NAME}")-${_REPO}-${TIME_STAMP}.iso"
+
+cond_mount tmpfs "${TMPFS}" tmpfs "suid,dev,size=${TMPFS_SIZE}"
+
+mkdir --parents "${CACHEDIR}"
+find="$(find "${CACHEDIR}" -mindepth 1 -maxdepth 1 -type d | sort --numeric)"
+if [[ -z "${find}" ]]; then
+    [[ -z "${_INPUT}" ]] && _INPUT="$(get_iso "${ISODIR}" "${ISOURL}")"
+    cond_mount "${_INPUT}" "${PREFIX}/isobase" iso9660 ro,loop
+    # TODO: Mount iso in place
+    mkdir --parents "${TMP}/lower"
+    lowerdir="${TMP}/lower"
+    SQUASHFSPATH="${PREFIX}/isobase/casper/filesystem.squashfs"
+else
+    lowerdir="$(head --lines=1 <<< "${find}")"
+    find="$(grep --invert-match "${lowerdir}" <<< "${find}")"
+    lowerdir="$(sed 's/:/\\:/g' <<< "${lowerdir}")/image"
+    for dir in ${find}; do
+        lowerdir="$(sed 's/:/\\:/g' <<< "${dir}")/image:${lowerdir}"
+    done
+    SQUASHFSPATH="${TMP}/image/casper/filesystem.squashfs"
+fi
+
+upperdir="${TMP}/upper"
+workdir="${TMP}/work"
+
+mkdir --parents "${upperdir}"
+mkdir --parents "${workdir}"
+
+cond_mount overlay "${TMP}/image" overlay \
+"rw,lowerdir=${lowerdir},upperdir=${upperdir},workdir=${workdir}"
+
+cond_mount "${SQUASHFSPATH}" "${PREFIX}/squashfsbase" squashfs ro,loop
+
+lowerdir="${PREFIX}/squashfsbase"
+upperdir="${TMPFS}/upper"
+workdir="${TMPFS}/work"
+
+mkdir --parents "${upperdir}"
+mkdir --parents "${workdir}"
 
-mountTmpfs "${TMPFS}"
-mountOverlay "${CHROOTDIR}" "${TMPFS}"
+cond_mount overlay "${CHROOTDIR}" overlay \
+"rw,lowerdir=${lowerdir},upperdir=${upperdir},workdir=${workdir}"
+
+export NO_DBUS=true
 
 # Each one of the available scripts is executed in numeric order
 for script in "${SCRIPTSDIR}"/*; do
-    if [ -x "${script}" ] && grep -E --quiet '^[0-9]{2}-[A-Za-z]+' <<< "$(basename "${script}")"; then
-        createIsoLogger --message "Running $(basename "${script}")..." --type info
-        if ! "${script}"\
-             "${_DIST}" \
-             "${_ARCH}" \
-             "${_REPO}" \
-             "${CHROOTDIR}" \
-             "${SCRIPT_NAME}" \
-             "${DISTRO}" \
-             "${DPLIST}" \
-             "${INSTLIST}" \
-             "${ISOLINUX}" \
-             "${MOUNTLIST}" \
-             "${OURSOURCESLIST}" \
-             "${RMDSKT}" \
-             "${RMLIST}" \
-             "${SCRIPTSDIR}" \
-             "${SHORTNAME}" \
-             "${SOURCESLISTDEFAULT}" \
+    if [[ -x "${script}" ]] && grep -E --quiet '^[0-9]{2}-[A-Za-z]+' \
+    <<< "$(basename "${script}")"; then
+        create_iso_logger --message "Running $(basename "${script}")..." \
+        --type info
+        if ! "${script}" \
+             "${_PROF}" \
+             "${NAME}" \
+             "${WEBSITE}" \
              "${TMP}" \
-             "${TMPFS}" \
-             "${REPOPKGS}" \
-             "${LOG_FILE}"; then
-			cleanup "${CHROOTDIR}" "${TMP}"
-            exit 1
+             "${CHROOTDIR}" \
+             "${CACHEDIR}" \
+             "${PKGLIST}" \
+             "${SOURCESLIST}" \
+             "${_REPO}" \
+             "${KEYURL}" \
+             "${_DEBUG}"; then
+			 cleanup "${CHROOTDIR}"
+             create_iso_logger --message "Failed to run " \
+             "$(basename "${script}")"
         fi
-
-        # If the script is marked as 'chroot', it means it performs changes in the overlayed chroot filesystem,
-        # therefore, the 'chroot script', filled with the required commands by the marked script, is executed
-        # This warning is disabled because the literal '-' is actually needed:
+        # This warning is disabled because the literal '-' is needed:
         # shellcheck disable=SC1001
         if [[ "$(basename "${script}")" =~ [0-9]+\-chroot\.* ]]; then
-            initChroot "${CHROOTDIR}" "${LOG_FILE}"
-            execChroot "${CHROOTDIR}" "${SCRIPT_NAME}"
-            closeChroot "${CHROOTDIR}" "${LOG_FILE}"
+            # If the script is marked as 'chroot', it means it performs
+            # changes in the overlaid chroot filesystem, therefore, the
+            # 'chroot script', filled with the required commands by the marked
+            # script, is executed
+            init_chroot "${CHROOTDIR}"
+            exec_chroot "${CHROOTDIR}"
+            close_chroot "${CHROOTDIR}"
         fi
     fi
 done
 
 # Finally generates the resulting iso image
-NAME="LinuxEducacional6-$(echo "${_DIST}" | cut --delimiter='/' --fields=2).iso"
-pushd "${TMP}/image" || createIsoLogger --message "Unable to change directory" --tag "pushd"
-xorriso -as mkisofs -isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin -c isolinux/boot.cat -b isolinux/isolinux.bin \
--no-emul-boot -boot-load-size 4 -boot-info-table -eltorito-alt-boot -no-emul-boot -isohybrid-gpt-basdat \
--o "${PREFIX}/iso/${NAME}" . || createIsoLogger --message "Failed to generate iso image." --tag "xorriso"
-popd || createIsoLogger --message "Unable to change directory" --tag "popd"
-
-cleanup "${CHROOTDIR}" "${TMP}"
-umountOverlay "${CHROOTDIR}" "${TMPFS}"
-umountTmpfs "${TMPFS}"
+mkdir --parents "$(dirname "${_OUTPUT}")"
+pushd "${TMP}/image" || \
+create_iso_logger --message "Unable to change directory" --tag "pushd"
+xorriso -as mkisofs -isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin -c \
+isolinux/boot.cat -b isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 \
+-boot-info-table -eltorito-alt-boot -no-emul-boot -isohybrid-gpt-basdat -o \
+"${_OUTPUT}" . || \
+create_iso_logger --message "Failed to generate iso image." --tag "xorriso"
+popd || create_iso_logger --message "Unable to change directory" --tag "popd"
+
+cleanup "${CHROOTDIR}"
+
+cond_umount "${CHROOTDIR}"
+rm --recursive --force "${CHROOTDIR}"
+cond_umount "${PREFIX:?}/squashfsbase"
+rm --recursive --force "${PREFIX:?}/squashfsbase"
+cond_umount "${TMP:?}/image"
+
+mkdir --parents "${CACHEDIR}/${TIME_STAMP}"
+mv "${TMP}/MD5SUMS" "${CACHEDIR}/${TIME_STAMP}/" || \
+create_iso_logger --message "Unable to move file" --tag "mv"
+mv "${TMP}/upper" "${CACHEDIR}/${TIME_STAMP}/image" || \
+create_iso_logger --message "Unable to move directory" --tag "mv"
+
+cond_umount "${TMPFS}"
+rm --recursive --force "${TMPFS}"
+cond_umount "${PREFIX:?}/isobase"
+rm --recursive --force "${PREFIX:?}/isobase"
 
 exit 0

cron/le6/job.sh

+#!/bin/bash
+# shellcheck disable=SC1090
+#
+# Copyright (C) 2017 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana - C3SL/UFPR
+#
+# This file is part of create-iso
+#
+# create-iso is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 3
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+# USA.
+
+if [ "$(id -u)" != "0" ]; then
+    echo "You must have more power to run this script. Are you root?"
+    exit -1
+fi
+
+PREFIX="$(realpath "$(dirname "$0")")"
+EXE="$1"
+VERSION="$2"
+ISOPATH="$3"
+TODAY="$(date +'%Y-%m-%d')"
+CMD="\"${EXE}\" --profile le6 --version \"${VERSION}\" --repo testing --output \"${PREFIX}/linux-educacional-${VERSION}-testing-${TODAY}.iso\" --debug --sendmail"
+CFGFILE="${PREFIX}/vars.cfg"
+
+source "${CFGFILE}"
+
+if [ "${SWITCH}" == 0 ]; then
+    # Turn up switch
+    sed --in-place "s/SWITCH=0/SWITCH=1/" "${CFGFILE}"
+    # Do nothing
+    exit 0
+else
+    # Turn down switch
+    sed --in-place "s/SWITCH=1/SWITCH=0/" "${CFGFILE}"
+    # Proceed with job
+fi
+
+# Create GNU screen session
+screen -dmS "${TODAY}" || exit 1
+
+# Execute c3geniso in the main window
+screen -S "${TODAY}" -X stuff "${CMD} && scp -i /home/lucas/.ssh/id_rsa_deployiso \"${PREFIX}\"/*.iso repository@repo.c3sl.ufpr.br:'/home/repository/www/le6/iso' && mv \"${PREFIX}\"/*.iso \"${ISOPATH}\" && exit\n" || exit 2
+
+exit 0

cron/le6/vars.cfg

+SWITCH=0

entra_chroot.sh

-#!/bin/bash
-# shellcheck disable=SC1090
-
-mount --bind /dev chroot/dev
-mount --bind /dev/pts chroot/dev/pts
-mount --bind /sys chroot/sys
-mount --bind /proc chroot/proc
-#chroot chroot dbus-uuidgen > chroot/var/lib/dbus/machine-id
-chroot chroot

helper/logging.incsh

-readonly ERROR=1
-readonly WARNING=2
-readonly INFO=4
-readonly DEBUG=8
-readonly ALL=15
-
-VERBOSE_FLAGS=${ALL}
-
-mapType() {
-	case "${1}" in
-		e | error    ) echo "${ERROR}" ;;
-		w | warning  ) echo "${WARNING}" ;;
-		i | info     ) echo "${INFO}" ;;
-		d | debug    ) echo "${DEBUG}" ;;
-                *            ) createIsoLogger -m "Invalid type '${1}'" -T "LOGGER"; return 1 ;;
-	esac
-}
-
-createIsoLogger() {
-
-	TYPE="${ERROR}"
-	MSG=""
-	SCRIPT="$(basename "${BASH_SOURCE[1]}")"
-	LINE="${BASH_LINENO[0]}"
-
-	while true; do
-    	case "${1}" in
-                -t | --type    ) TYPE="$(mapType "${2}")" || return; shift; shift ;;
-                -T | --tag     ) TAG="${2}"; shift; shift ;;
-                -m | --message ) MSG="${2}"; shift; shift ;;
-                -s | --script  ) SCRIPT="${2}"; shift; shift ;;
-        	-l | --line    ) LINE="${2}"; shift; shift ;;
-                -*             ) createIsoLogger -m "Unrecognized option '${1}'" -T "LOGGER"; return ;;
- 	        *              ) break ;;
-    	esac
-	done
-
-	if [ "$((${VERBOSE_FLAGS} & ${TYPE}))" -eq "${TYPE}" ]; then
-                if [ -z "${TAG}" ]; then
-                        LOG_LINE="[${SCRIPT}]: line ${LINE}: ${MSG}"
-                else
-                        LOG_LINE="[${SCRIPT}]: line ${LINE}: [${TAG}]: ${MSG}"
-                fi
-		case "${TYPE}" in
-			"${ERROR}"    ) LOG_LINE="\033[38;5;9m[ERROR]: ${LOG_LINE}\033[0m" ;;
-			"${WARNING}"  ) LOG_LINE="\033[38;5;11m[WARNING]: ${LOG_LINE}\033[0m" ;;
-			"${INFO}"     ) LOG_LINE="\033[38;5;10m[INFO]: ${LOG_LINE}\033[0m" ;;
-			"${DEBUG}"    ) LOG_LINE="\033[38;5;6m[DEBUG]: ${LOG_LINE}\033[0m" ;;
-			*             ) createIsoLogger -m "Invalid type '${TYPE}'" -T "LOGGER"; return ;;
-		esac
-		echo -e "${LOG_LINE}" 1>&2
-		echo -e "${LOG_LINE}" >> "${LOG_FILE}"
-	else
-		createIsoLogger -m "Tried to use disabled type '${TYPE}'" -T "LOGGER"
-		return
-	fi
-
-	if [ "${TYPE}" -eq "${ERROR}" ]; then
-		/bin/bash
-	fi
-}
-
-true

include/base.sh

+#!/bin/bash
+# shellcheck disable=SC1090
+#
+# Copyright (C) 2017 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana - C3SL/UFPR
+#
+# This file is part of create-iso
+#
+# create-iso is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 3
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+# USA.
+
+get_iso() {
+    local isodir="$1"
+    local isosrc="$2"
+
+    local isoname
+    local md5
+    local oldmd5
+    local newmd5
+
+    md5="$(wget "${isosrc}/MD5SUMS" -O- | \
+    grep "amd64" | \
+    sort --version-sort | \
+    tail --lines=1)"
+    isoname="$(cut --delimiter='*' --fields=2 <<< "${md5}")"
+    newmd5="$(cut --delimiter=' ' --fields=1 <<< "${md5}")"
+    oldmd5="$(cat "${isodir}/input/MD5SUMS")"
+
+    if [[ "${oldmd5}" != "${newmd5}" ]]; then
+        mkdir --parents "${isodir}/input"
+        pushd "${isodir}/input" >/dev/null || \
+        create_iso_logger --message "Unable to change directory" --tag "pushd"
+        create_iso_logger --message "Downloading ${isoname}" --type info
+        wget "${isosrc}/${isoname}" || \
+        create_iso_logger --message "Unable to download image" --tag "wget"
+        create_iso_logger --message "Generating md5sum" --type info
+        md5="$(md5sum "${isodir}/input/${isoname}" | \
+        cut --delimiter=' ' --fields=1)"
+        [[ "${md5}" != "${newmd5}" ]] && \
+        create_iso_logger --message "Iso image is corrupted"
+        popd >/dev/null || \
+        create_iso_logger --message "Unable to change directory" --tag "popd"
+        echo "${newmd5}" > "${isodir}/input/MD5SUMS"
+    fi
+
+    echo "${isodir}/input/${isoname}"
+}
\ No newline at end of file

common.sh → include/chroot.sh

 #!/bin/bash
 # shellcheck disable=SC1090
-
-initChroot() {
-    local chrootdir="${1}"
+#
+# Copyright (C) 2017 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana - C3SL/UFPR
+#
+# This file is part of create-iso
+#
+# create-iso is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 3
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.