Fix optional shellcheck warnings

Additionally fix a few code style issues found with shfmt.

7 files changed, 373 insertions, 372 deletions

diff --git a/.editorconfig b/.editorconfig
index 74ed4eb..cbb5538 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -16,6 +16,10 @@ charset = utf-8
 indent_style = space
 indent_size = 4
 max_line_length = 120
+# for shfmt
+switch_case_indent = true
+binary_next_line = true
+
 
 [*.{yml,yaml}]
 end_of_line = lf
@@ -32,3 +36,6 @@ trim_trailing_whitespace = true
 charset = utf-8
 indent_style = space
 indent_size = 2
+
+[Makefile]
+indent_style = tab
diff --git a/.gitlab/ci/build_archiso.sh b/.gitlab/ci/build_archiso.sh
index 104792a..3e1211b 100755
--- a/.gitlab/ci/build_archiso.sh
+++ b/.gitlab/ci/build_archiso.sh
@@ -35,141 +35,142 @@ ca_key=""
 pgp_key_id=""
 
 print_section_start() {
-  # gitlab collapsible sections start: https://docs.gitlab.com/ee/ci/jobs/#custom-collapsible-sections
-  local _section _title
-  _section="${1}"
-  _title="${2}"
+    # gitlab collapsible sections start: https://docs.gitlab.com/ee/ci/jobs/#custom-collapsible-sections
+    local _section _title
+    _section="${1}"
+    _title="${2}"
 
-  printf "\e[0Ksection_start:%(%s)T:%s\r\e[0K%s\n" '-1' "${_section}" "${_title}"
+    printf "\e[0Ksection_start:%(%s)T:%s\r\e[0K%s\n" '-1' "${_section}" "${_title}"
 }
 
 print_section_end() {
-  # gitlab collapsible sections end: https://docs.gitlab.com/ee/ci/jobs/#custom-collapsible-sections
-  local _section
-  _section="${1}"
+    # gitlab collapsible sections end: https://docs.gitlab.com/ee/ci/jobs/#custom-collapsible-sections
+    local _section
+    _section="${1}"
 
-  printf "\e[0Ksection_end:%(%s)T:%s\r\e[0K\n" '-1' "${_section}"
+    printf "\e[0Ksection_end:%(%s)T:%s\r\e[0K\n" '-1' "${_section}"
 }
 
 cleanup() {
-  # clean up temporary directories
-  print_section_start "cleanup" "Cleaning up temporary directory"
+    # clean up temporary directories
+    print_section_start "cleanup" "Cleaning up temporary directory"
 
-  if [ -n "${tmpdir_base:-}" ]; then
-    rm -fr "${tmpdir_base}"
-  fi
+    if [[ -n "${tmpdir_base:-}" ]]; then
+        rm -fr "${tmpdir_base}"
+    fi
 
-  print_section_end "cleanup"
+    print_section_end "cleanup"
 }
 
 create_checksums() {
-  # create checksums for files
-  # $@: files
-  local _file_path _file_name _current_pwd
-  _current_pwd="${PWD}"
-
-  print_section_start "checksums" "Creating checksums"
-
-  for _file_path in "$@"; do
-    cd "$(dirname "${_file_path}")"
-    _file_name="$(basename "${_file_path}")"
-    b2sum "${_file_name}" > "${_file_name}.b2"
-    md5sum "${_file_name}" > "${_file_name}.md5"
-    sha1sum "${_file_name}" > "${_file_name}.sha1"
-    sha256sum "${_file_name}" > "${_file_name}.sha256"
-    sha512sum "${_file_name}" > "${_file_name}.sha512"
-    ls -lah "${_file_name}."{b2,md5,sha{1,256,512}}
-    cat "${_file_name}."{b2,md5,sha{1,256,512}}
-  done
-  cd "${_current_pwd}"
-
-  print_section_end "checksums"
+    # create checksums for files
+    # $@: files
+    local _file_path _file_name _current_pwd
+    _current_pwd="${PWD}"
+
+    print_section_start "checksums" "Creating checksums"
+
+    for _file_path in "$@"; do
+        cd "$(dirname "${_file_path}")"
+        _file_name="$(basename "${_file_path}")"
+        b2sum "${_file_name}" >"${_file_name}.b2"
+        md5sum "${_file_name}" >"${_file_name}.md5"
+        sha1sum "${_file_name}" >"${_file_name}.sha1"
+        sha256sum "${_file_name}" >"${_file_name}.sha256"
+        sha512sum "${_file_name}" >"${_file_name}.sha512"
+        ls -lah "${_file_name}."{b2,md5,sha{1,256,512}}
+        cat "${_file_name}."{b2,md5,sha{1,256,512}}
+    done
+    cd "${_current_pwd}"
+
+    print_section_end "checksums"
 }
 
 create_zsync_delta() {
-  # create zsync control files for files
-  # $@: files
-  local _file
-
-  print_section_start "zsync_delta" "Creating zsync delta"
-
-  for _file in "$@"; do
-    if [[ "${buildmode}" == "bootstrap" ]]; then
-      # zsyncmake fails on 'too long between blocks' with default block size on bootstrap image
-      zsyncmake -v -b 512 -C -u "${_file##*/}" -o "${_file}".zsync "${_file}"
-    else
-      zsyncmake -v -C -u "${_file##*/}" -o "${_file}".zsync "${_file}"
-    fi
-  done
+    # create zsync control files for files
+    # $@: files
+    local _file
+
+    print_section_start "zsync_delta" "Creating zsync delta"
+
+    for _file in "$@"; do
+        if [[ "${buildmode}" == "bootstrap" ]]; then
+            # zsyncmake fails on 'too long between blocks' with default block size on bootstrap image
+            zsyncmake -v -b 512 -C -u "${_file##*/}" -o "${_file}".zsync "${_file}"
+        else
+            zsyncmake -v -C -u "${_file##*/}" -o "${_file}".zsync "${_file}"
+        fi
+    done
 
-  print_section_end "zsync_delta"
+    print_section_end "zsync_delta"
 }
 
 create_metrics() {
-  local _metrics="${output}/metrics.txt"
-  # create metrics
-  print_section_start "metrics" "Creating metrics"
-
-  {
-    # create metrics based on buildmode
-    case "${buildmode}" in
-      iso)
-        printf 'image_size_mebibytes{image="%s"} %s\n' \
-          "${profile}" \
-          "$(du -m -- "${output}/"*.iso | cut -f1)"
-        printf 'package_count{image="%s"} %s\n' \
-          "${profile}" \
-          "$(sort -u -- "${tmpdir}/iso/"*/pkglist.*.txt | wc -l)"
-        if [[ -e "${tmpdir}/efiboot.img" ]]; then
-          printf 'eltorito_efi_image_size_mebibytes{image="%s"} %s\n' \
-            "${profile}" \
-            "$(du -m -- "${tmpdir}/efiboot.img" | cut -f1)"
-        fi
-        # shellcheck disable=SC2046
-        # shellcheck disable=SC2183
-        printf 'initramfs_size_mebibytes{image="%s",initramfs="%s"} %s\n' \
-          $(du -m -- "${tmpdir}/iso/"*/boot/**/initramfs*.img | \
-            awk -v profile="${profile}" \
-            'function basename(file) {
-              sub(".*/", "", file)
-              return file
-            }
-            { print profile, basename($2), $1 }'
-          )
-        ;;
-      netboot)
-        printf 'netboot_size_mebibytes{image="%s"} %s\n' \
-          "${profile}" \
-          "$(du -m -- "${output}/${install_dir}/" | tail -n1 | cut -f1)"
-        printf 'netboot_package_count{image="%s"} %s\n' \
-          "${profile}" \
-          "$(sort -u -- "${tmpdir}/iso/"*/pkglist.*.txt | wc -l)"
-        ;;
-      bootstrap)
-        printf 'bootstrap_size_mebibytes{image="%s"} %s\n' \
-          "${profile}" \
-          "$(du -m -- "${output}/"*.tar*(.gz|.xz|.zst) | cut -f1)"
-        printf 'bootstrap_package_count{image="%s"} %s\n' \
-          "${profile}" \
-          "$(sort -u -- "${tmpdir}/"*/bootstrap/root.*/pkglist.*.txt | wc -l)"
-        ;;
-    esac
-  } > "${_metrics}"
-  ls -lah "${_metrics}"
-  cat "${_metrics}"
-
-  print_section_end "metrics"
+    local _metrics="${output}/metrics.txt"
+    # create metrics
+    print_section_start "metrics" "Creating metrics"
+
+    {
+        # create metrics based on buildmode
+        case "${buildmode}" in
+            iso)
+                printf 'image_size_mebibytes{image="%s"} %s\n' \
+                    "${profile}" \
+                    "$(du -m -- "${output}/"*.iso | cut -f1)"
+                printf 'package_count{image="%s"} %s\n' \
+                    "${profile}" \
+                    "$(sort -u -- "${tmpdir}/iso/"*/pkglist.*.txt | wc -l)"
+                if [[ -e "${tmpdir}/efiboot.img" ]]; then
+                    printf 'eltorito_efi_image_size_mebibytes{image="%s"} %s\n' \
+                    "${profile}" \
+                    "$(du -m -- "${tmpdir}/efiboot.img" | cut -f1)"
+                fi
+                # shellcheck disable=SC2046
+                # shellcheck disable=SC2183
+                printf 'initramfs_size_mebibytes{image="%s",initramfs="%s"} %s\n' \
+                    $(
+                        du -m -- "${tmpdir}/iso/"*/boot/**/initramfs*.img \
+                            | awk -v profile="${profile}" \
+                                'function basename(file) {
+                                    sub(".*/", "", file)
+                                    return file
+                                }
+                                { print profile, basename($2), $1 }'
+                    )
+                ;;
+            netboot)
+                printf 'netboot_size_mebibytes{image="%s"} %s\n' \
+                    "${profile}" \
+                    "$(du -m -- "${output}/${install_dir}/" | tail -n1 | cut -f1)"
+                printf 'netboot_package_count{image="%s"} %s\n' \
+                    "${profile}" \
+                    "$(sort -u -- "${tmpdir}/iso/"*/pkglist.*.txt | wc -l)"
+                ;;
+            bootstrap)
+                printf 'bootstrap_size_mebibytes{image="%s"} %s\n' \
+                    "${profile}" \
+                    "$(du -m -- "${output}/"*.tar*(.gz|.xz|.zst) | cut -f1)"
+                printf 'bootstrap_package_count{image="%s"} %s\n' \
+                    "${profile}" \
+                    "$(sort -u -- "${tmpdir}/"*/bootstrap/root.*/pkglist.*.txt | wc -l)"
+                ;;
+        esac
+    } >"${_metrics}"
+    ls -lah "${_metrics}"
+    cat "${_metrics}"
+
+    print_section_end "metrics"
 }
 
 create_ephemeral_pgp_key() {
-  # create an ephemeral PGP key for signing the rootfs image
-  print_section_start "ephemeral_pgp_key" "Creating ephemeral PGP key"
+    # create an ephemeral PGP key for signing the rootfs image
+    print_section_start "ephemeral_pgp_key" "Creating ephemeral PGP key"
 
-  gnupg_homedir="$tmpdir/.gnupg"
-  mkdir -p "${gnupg_homedir}"
-  chmod 700 "${gnupg_homedir}"
+    gnupg_homedir="$tmpdir/.gnupg"
+    mkdir -p "${gnupg_homedir}"
+    chmod 700 "${gnupg_homedir}"
 
-  cat << __EOF__ > "${gnupg_homedir}"/gpg.conf
+    cat <<__EOF__ >"${gnupg_homedir}"/gpg.conf
 quiet
 batch
 no-tty
@@ -180,7 +181,7 @@ armor
 no-emit-version
 __EOF__
 
-  gpg --homedir "${gnupg_homedir}" --gen-key <<EOF
+    gpg --homedir "${gnupg_homedir}" --gen-key <<EOF
 %echo Generating ephemeral Arch Linux release engineering key pair...
 Key-Type: default
 Key-Length: 3072
@@ -194,63 +195,63 @@ Expire-Date: 0
 %echo Done
 EOF
 
-  pgp_key_id="$(
-    gpg --homedir "${gnupg_homedir}" \
-        --list-secret-keys \
-        --with-colons \
-        | awk -F':' '{if($1 ~ /sec/){ print $5 }}'
-  )"
+    pgp_key_id="$(
+        gpg --homedir "${gnupg_homedir}" \
+            --list-secret-keys \
+            --with-colons \
+            | awk -F':' '{if($1 ~ /sec/){ print $5 }}'
+    )"
 
-  pgp_sender="Arch Linux Release Engineering (Ephemeral Signing Key) <arch-releng@lists.archlinux.org>"
+    pgp_sender="Arch Linux Release Engineering (Ephemeral Signing Key) <arch-releng@lists.archlinux.org>"
 
-  print_section_end "ephemeral_pgp_key"
+    print_section_end "ephemeral_pgp_key"
 }
 
 create_ephemeral_codesigning_keys() {
-  # create ephemeral certificates used for codesigning
-  print_section_start "ephemeral_codesigning_key" "Creating ephemeral codesigning keys"
-
-  # The exact steps in creating a CA with Codesigning being signed was taken from
-  # https://jamielinux.com/docs/openssl-certificate-authority/introduction.html
-  # (slight modifications to the process to not disturb default values of /etc/ssl/openssl.cnf)
-  
-  codesigning_dir="${tmpdir}/.codesigning/"
-  local ca_dir="${codesigning_dir}/ca/"
-
-  local ca_conf="${ca_dir}/certificate_authority.cnf"
-  local ca_subj="/C=DE/ST=Berlin/L=Berlin/O=Arch Linux/OU=Release Engineering/CN=archlinux.org"
-  ca_cert="${ca_dir}/cacert.pem"
-  ca_key="${ca_dir}/private/cakey.pem"
-
-  local codesigning_conf="${codesigning_dir}/code_signing.cnf"
-  local codesigning_subj="/C=DE/ST=Berlin/L=Berlin/O=Arch Linux/OU=Release Engineering/CN=archlinux.org"
-  codesigning_cert="${codesigning_dir}/codesign.crt"
-  codesigning_key="${codesigning_dir}/codesign.key"
-
-  mkdir -p "${ca_dir}/"{private,newcerts,crl}
-  mkdir -p "${codesigning_dir}"
-  cp -- /etc/ssl/openssl.cnf "${codesigning_conf}"
-  cp -- /etc/ssl/openssl.cnf "${ca_conf}"
-  touch "${ca_dir}/index.txt"
-  echo "1000" > "${ca_dir}/serial"
-
-  # Prepare the ca configuration for the change in directory
-  sed -i "s#/etc/ssl#${ca_dir}#g" "${ca_conf}"
-
-  # Create the Certificate Authority
-  openssl req \
-      -newkey rsa:4096 \
-      -sha256 \
-      -nodes \
-      -x509 \
-      -new \
-      -sha256 \
-      -keyout "${ca_key}" \
-      -config "${ca_conf}" \
-      -subj "${ca_subj}" \
-      -out "${ca_cert}"
-
-  cat << EOF >> "${ca_conf}"
+    # create ephemeral certificates used for codesigning
+    print_section_start "ephemeral_codesigning_key" "Creating ephemeral codesigning keys"
+
+    # The exact steps in creating a CA with Codesigning being signed was taken from
+    # https://jamielinux.com/docs/openssl-certificate-authority/introduction.html
+    # (slight modifications to the process to not disturb default values of /etc/ssl/openssl.cnf)
+
+    codesigning_dir="${tmpdir}/.codesigning/"
+    local ca_dir="${codesigning_dir}/ca/"
+
+    local ca_conf="${ca_dir}/certificate_authority.cnf"
+    local ca_subj="/C=DE/ST=Berlin/L=Berlin/O=Arch Linux/OU=Release Engineering/CN=archlinux.org"
+    ca_cert="${ca_dir}/cacert.pem"
+    ca_key="${ca_dir}/private/cakey.pem"
+
+    local codesigning_conf="${codesigning_dir}/code_signing.cnf"
+    local codesigning_subj="/C=DE/ST=Berlin/L=Berlin/O=Arch Linux/OU=Release Engineering/CN=archlinux.org"
+    codesigning_cert="${codesigning_dir}/codesign.crt"
+    codesigning_key="${codesigning_dir}/codesign.key"
+
+    mkdir -p "${ca_dir}/"{private,newcerts,crl}
+    mkdir -p "${codesigning_dir}"
+    cp -- /etc/ssl/openssl.cnf "${codesigning_conf}"
+    cp -- /etc/ssl/openssl.cnf "${ca_conf}"
+    touch "${ca_dir}/index.txt"
+    echo "1000" >"${ca_dir}/serial"
+
+    # Prepare the ca configuration for the change in directory
+    sed -i "s#/etc/ssl#${ca_dir}#g" "${ca_conf}"
+
+    # Create the Certificate Authority
+    openssl req \
+        -newkey rsa:4096 \
+        -sha256 \
+        -nodes \
+        -x509 \
+        -new \
+        -sha256 \
+        -keyout "${ca_key}" \
+        -config "${ca_conf}" \
+        -subj "${ca_subj}" \
+        -out "${ca_cert}"
+
+    cat <<EOF >>"${ca_conf}"
 
 [ v3_intermediate_ca ]
 # Extensions for a typical intermediate CA ('man x509v3_config').
@@ -261,7 +262,7 @@ keyUsage = critical, digitalSignature, cRLSign, keyCertSign
 
 EOF
 
-  cat << EOF >> "${codesigning_conf}"
+    cat <<EOF >>"${codesigning_conf}"
 
 [codesigning]
 keyUsage=digitalSignature
@@ -269,65 +270,65 @@ extendedKeyUsage=codeSigning, clientAuth, emailProtection
 
 EOF
 
-  openssl req \
-      -newkey rsa:4096 \
-      -keyout "${codesigning_key}" \
-      -nodes \
-      -sha256 \
-      -out "${codesigning_cert}.csr" \
-      -config "${codesigning_conf}" \
-      -subj "${codesigning_subj}" \
-      -extensions codesigning
-
-  # Sign the code signing certificate with the CA
-  openssl ca \
-      -batch \
-      -config "${ca_conf}" \
-      -extensions v3_intermediate_ca \
-      -days 3650 \
-      -notext \
-      -md sha256 \
-      -in "${codesigning_cert}.csr" \
-      -out "${codesigning_cert}"
-
-  print_section_end "ephemeral_codesigning_key"
+    openssl req \
+        -newkey rsa:4096 \
+        -keyout "${codesigning_key}" \
+        -nodes \
+        -sha256 \
+        -out "${codesigning_cert}.csr" \
+        -config "${codesigning_conf}" \
+        -subj "${codesigning_subj}" \
+        -extensions codesigning
+
+    # Sign the code signing certificate with the CA
+    openssl ca \
+        -batch \
+        -config "${ca_conf}" \
+        -extensions v3_intermediate_ca \
+        -days 3650 \
+        -notext \
+        -md sha256 \
+        -in "${codesigning_cert}.csr" \
+        -out "${codesigning_cert}"
+
+    print_section_end "ephemeral_codesigning_key"
 }
 
 run_mkarchiso() {
-  # run mkarchiso
-  create_ephemeral_pgp_key
-  create_ephemeral_codesigning_keys
-
-  print_section_start "mkarchiso" "Running mkarchiso"
-  mkdir -p "${output}/" "${tmpdir}/"
-  GNUPGHOME="${gnupg_homedir}" ./archiso/mkarchiso \
-      -D "${install_dir}" \
-      -c "${codesigning_cert} ${codesigning_key} ${ca_cert}" \
-      -g "${pgp_key_id}" \
-      -G "${pgp_sender}" \
-      -o "${output}/" \
-      -w "${tmpdir}/" \
-      -m "${buildmode}" \
-      -v "configs/${profile}"
-
-  print_section_end "mkarchiso"
-
-  if [[ "${buildmode}" =~ "iso" ]]; then
-    create_zsync_delta "${output}/"*.iso
-    create_checksums "${output}/"*.iso
-  fi
-  if [[ "${buildmode}" == "bootstrap" ]]; then
-    create_zsync_delta "${output}/"*.tar*(.gz|.xz|.zst)
-    create_checksums "${output}/"*.tar*(.gz|.xz|.zst)
-  fi
-  create_metrics
-
-  print_section_start "ownership" "Setting ownership on output"
-
-  if [[ -n "${SUDO_UID:-}" ]] && [[ -n "${SUDO_GID:-}" ]]; then
-    chown -Rv "${SUDO_UID}:${SUDO_GID}" -- "${output}"
-  fi
-  print_section_end "ownership"
+    # run mkarchiso
+    create_ephemeral_pgp_key
+    create_ephemeral_codesigning_keys
+
+    print_section_start "mkarchiso" "Running mkarchiso"
+    mkdir -p "${output}/" "${tmpdir}/"
+    GNUPGHOME="${gnupg_homedir}" ./archiso/mkarchiso \
+        -D "${install_dir}" \
+        -c "${codesigning_cert} ${codesigning_key} ${ca_cert}" \
+        -g "${pgp_key_id}" \
+        -G "${pgp_sender}" \
+        -o "${output}/" \
+        -w "${tmpdir}/" \
+        -m "${buildmode}" \
+        -v "configs/${profile}"
+
+    print_section_end "mkarchiso"
+
+    if [[ "${buildmode}" =~ "iso" ]]; then
+        create_zsync_delta "${output}/"*.iso
+        create_checksums "${output}/"*.iso
+    fi
+    if [[ "${buildmode}" == "bootstrap" ]]; then
+        create_zsync_delta "${output}/"*.tar*(.gz|.xz|.zst)
+        create_checksums "${output}/"*.tar*(.gz|.xz|.zst)
+    fi
+    create_metrics
+
+    print_section_start "ownership" "Setting ownership on output"
+
+    if [[ -n "${SUDO_UID:-}" ]] && [[ -n "${SUDO_GID:-}" ]]; then
+        chown -Rv "${SUDO_UID}:${SUDO_GID}" -- "${output}"
+    fi
+    print_section_end "ownership"
 }
 
 trap cleanup EXIT
diff --git a/archiso/mkarchiso b/archiso/mkarchiso
index 470a960..15534bf 100755
--- a/archiso/mkarchiso
+++ b/archiso/mkarchiso
@@ -169,7 +169,7 @@ _cleanup_pacstrap_dir() {
     # Create /etc/machine-id with special value 'uninitialized': the final id is
     # generated on first boot, systemd's first-boot mechanism applies (see machine-id(5))
     rm -f -- "${pacstrap_dir}/etc/machine-id"
-    printf 'uninitialized\n' > "${pacstrap_dir}/etc/machine-id"
+    printf 'uninitialized\n' >"${pacstrap_dir}/etc/machine-id"
 
     _msg_info "Done!"
 }
@@ -204,7 +204,7 @@ _mkairootfs_ext4+squashfs() {
     [[ ! "${quiet}" == "y" ]] || mkfs_ext4_options+=('-q')
     rm -f -- "${pacstrap_dir}.img"
     E2FSPROGS_FAKE_TIME="${SOURCE_DATE_EPOCH}" mkfs.ext4 "${mkfs_ext4_options[@]}" -- "${pacstrap_dir}.img" 32G
-    tune2fs -c 0 -i 0 -- "${pacstrap_dir}.img" > /dev/null
+    tune2fs -c 0 -i 0 -- "${pacstrap_dir}.img" >/dev/null
     _msg_info "Done!"
 
     install -d -m 0755 -- "${isofs_dir}/${install_dir}/${arch}"
@@ -245,9 +245,9 @@ _mkchecksum() {
     _msg_info "Creating checksum file for self-test..."
     cd -- "${isofs_dir}/${install_dir}/${arch}"
     if [[ -e "${isofs_dir}/${install_dir}/${arch}/airootfs.sfs" ]]; then
-        sha512sum airootfs.sfs > airootfs.sha512
+        sha512sum airootfs.sfs >airootfs.sha512
     elif [[ -e "${isofs_dir}/${install_dir}/${arch}/airootfs.erofs" ]]; then
-        sha512sum airootfs.erofs > airootfs.sha512
+        sha512sum airootfs.erofs >airootfs.sha512
     fi
     cd -- "${OLDPWD}"
     _msg_info "Done!"
@@ -280,12 +280,12 @@ _run_once() {
 # Set up custom pacman.conf with custom cache and pacman hook directories.
 _make_pacman_conf() {
     local _cache_dirs _system_cache_dirs _profile_cache_dirs
-    _system_cache_dirs="$(pacman-conf CacheDir| tr '\n' ' ')"
-    _profile_cache_dirs="$(pacman-conf --config "${pacman_conf}" CacheDir| tr '\n' ' ')"
+    _system_cache_dirs="$(pacman-conf CacheDir | tr '\n' ' ')"
+    _profile_cache_dirs="$(pacman-conf --config "${pacman_conf}" CacheDir | tr '\n' ' ')"
 
     # Only use the profile's CacheDir, if it is not the default and not the same as the system cache dir.
-    if [[ "${_profile_cache_dirs}" != "/var/cache/pacman/pkg" ]] && \
-        [[ "${_system_cache_dirs}" != "${_profile_cache_dirs}" ]]; then
+    if [[ "${_profile_cache_dirs}" != "/var/cache/pacman/pkg" ]] \
+        && [[ "${_system_cache_dirs}" != "${_profile_cache_dirs}" ]]; then
         _cache_dirs="${_profile_cache_dirs}"
     else
         _cache_dirs="${_system_cache_dirs}"
@@ -297,9 +297,9 @@ _make_pacman_conf() {
     # append CacheDir and HookDir to [options] section
     # HookDir is *always* set to the airootfs' override directory
     # see `man 8 pacman` for further info
-    pacman-conf --config "${pacman_conf}" | \
-        sed "/CacheDir/d;/DBPath/d;/HookDir/d;/LogFile/d;/RootDir/d;/\[options\]/a CacheDir = ${_cache_dirs}
-        /\[options\]/a HookDir = ${pacstrap_dir}/etc/pacman.d/hooks/" > "${work_dir}/${buildmode}.pacman.conf"
+    pacman-conf --config "${pacman_conf}" \
+        | sed "/CacheDir/d;/DBPath/d;/HookDir/d;/LogFile/d;/RootDir/d;/\[options\]/a CacheDir = ${_cache_dirs}
+        /\[options\]/a HookDir = ${pacstrap_dir}/etc/pacman.d/hooks/" >"${work_dir}/${buildmode}.pacman.conf"
 }
 
 # Prepare working directory and copy custom root file system files.
@@ -314,7 +314,7 @@ _make_custom_airootfs() {
         cp -af --no-preserve=ownership,mode -- "${profile}/airootfs/." "${pacstrap_dir}"
         # Set ownership and mode for files and directories
         for filename in "${!file_permissions[@]}"; do
-            IFS=':' read -ra permissions <<< "${file_permissions["${filename}"]}"
+            IFS=':' read -ra permissions <<<"${file_permissions["${filename}"]}"
             # Prevent file path traversal outside of $pacstrap_dir
             if [[ "$(realpath -q -- "${pacstrap_dir}${filename}")" != "${pacstrap_dir}"* ]]; then
                 _msg_error "Failed to set permissions on '${pacstrap_dir}${filename}'. Outside of valid path." 1
@@ -355,7 +355,7 @@ _make_packages() {
 
     # Unset TMPDIR to work around https://bugs.archlinux.org/task/70580
     if [[ "${quiet}" = "y" ]]; then
-        env -u TMPDIR pacstrap -C "${work_dir}/${buildmode}.pacman.conf" -c -G -M -- "${pacstrap_dir}" "${buildmode_pkg_list[@]}" &> /dev/null
+        env -u TMPDIR pacstrap -C "${work_dir}/${buildmode}.pacman.conf" -c -G -M -- "${pacstrap_dir}" "${buildmode_pkg_list[@]}" &>/dev/null
     else
         env -u TMPDIR pacstrap -C "${work_dir}/${buildmode}.pacman.conf" -c -G -M -- "${pacstrap_dir}" "${buildmode_pkg_list[@]}"
     fi
@@ -399,7 +399,7 @@ _make_customize_airootfs() {
             else
                 _msg_error "Failed to set permissions on '${pacstrap_dir}${passwd[5]}'. Outside of valid path." 1
             fi
-        done < "${profile}/airootfs/etc/passwd"
+        done <"${profile}/airootfs/etc/passwd"
         _msg_info "Done!"
     fi
 
@@ -452,7 +452,7 @@ _make_bootmode_bios.syslinux.mbr() {
              s|%ARCHISO_UUID%|${iso_uuid}|g;
              s|%INSTALL_DIR%|${install_dir}|g;
              s|%ARCH%|${arch}|g" \
-             "${_cfg}" > "${isofs_dir}/boot/syslinux/${_cfg##*/}"
+            "${_cfg}" >"${isofs_dir}/boot/syslinux/${_cfg##*/}"
     done
     if [[ -e "${profile}/syslinux/splash.png" ]]; then
         install -m 0644 -- "${profile}/syslinux/splash.png" "${isofs_dir}/boot/syslinux/"
@@ -527,10 +527,11 @@ _make_efibootimg() {
     fi
 
     # Convert from bytes to KiB and round up to the next full MiB with an additional MiB for reserved sectors.
-    imgsize_kib="$(awk 'function ceil(x){return int(x)+(x>int(x))}
+    imgsize_kib="$(
+        awk 'function ceil(x){return int(x)+(x>int(x))}
             function byte_to_kib(x){return x/1024}
             function mib_to_kib(x){return x*1024}
-            END {print mib_to_kib(ceil((byte_to_kib($1)+1024)/1024))}' <<< "${imgsize_bytes}"
+            END {print mib_to_kib(ceil((byte_to_kib($1)+1024)/1024))}' <<<"${imgsize_bytes}"
     )"
     # The FAT image must be created with mkfs.fat not mformat, as some systems have issues with mformat made images:
     # https://lists.gnu.org/archive/html/grub-devel/2019-04/msg00099.html
@@ -539,7 +540,7 @@ _make_efibootimg() {
     if [[ "${quiet}" == "y" ]]; then
         # mkfs.fat does not have a -q/--quiet option, so redirect stdout to /dev/null instead
         # https://github.com/dosfstools/dosfstools/issues/103
-        mkfs.fat -C -n ARCHISO_EFI "${efibootimg}" "${imgsize_kib}" > /dev/null
+        mkfs.fat -C -n ARCHISO_EFI "${efibootimg}" "${imgsize_kib}" >/dev/null
     else
         mkfs.fat -C -n ARCHISO_EFI "${efibootimg}" "${imgsize_kib}"
     fi
@@ -553,7 +554,7 @@ _make_common_bootmode_grub_copy_to_isofs() {
     local files_to_copy=()
 
     files_to_copy+=("${work_dir}/grub/"*)
-    if compgen -G "${profile}/grub/!(*.cfg)" &> /dev/null; then
+    if compgen -G "${profile}/grub/!(*.cfg)" &>/dev/null; then
         files_to_copy+=("${profile}/grub/"!(*.cfg))
     fi
     install -d -m 0755 -- "${isofs_dir}/boot/grub"
@@ -561,7 +562,7 @@ _make_common_bootmode_grub_copy_to_isofs() {
 }
 
 # Prepare GRUB configuration files
-_make_common_bootmode_grub_cfg(){
+_make_common_bootmode_grub_cfg() {
     local _cfg search_filename
 
     install -d -- "${work_dir}/grub"
@@ -569,7 +570,7 @@ _make_common_bootmode_grub_cfg(){
     # Create a /boot/grub/YYYY-mm-dd-HH-MM-SS-00.uuid file on ISO 9660. GRUB will search for it to find the ISO
     # volume. This is similar to what grub-mkrescue does, except it places the file in /.disk/, but we opt to use a
     # directory that does not start with a dot to avoid it being accidentally missed when copying the ISO's contents.
-    : > "${work_dir}/grub/${iso_uuid}.uuid"
+    : >"${work_dir}/grub/${iso_uuid}.uuid"
     search_filename="/boot/grub/${iso_uuid}.uuid"
 
     # Fill GRUB configuration files
@@ -579,7 +580,7 @@ _make_common_bootmode_grub_cfg(){
              s|%INSTALL_DIR%|${install_dir}|g;
              s|%ARCH%|${arch}|g;
              s|%ARCHISO_SEARCH_FILENAME%|${search_filename}|g" \
-             "${_cfg}" > "${work_dir}/grub/${_cfg##*/}"
+            "${_cfg}" >"${work_dir}/grub/${_cfg##*/}"
     done
 
     # Prepare grub.cfg that will be embedded inside the GRUB binaries
@@ -622,7 +623,7 @@ else
 fi
 EOF
     grubembedcfg="${grubembedcfg//'%ARCHISO_SEARCH_FILENAME%'/"${search_filename}"}"
-    printf '%s\n' "$grubembedcfg" > "${work_dir}/grub-embed.cfg"
+    printf '%s\n' "$grubembedcfg" >"${work_dir}/grub-embed.cfg"
 
     # Write grubenv
     printf '%.1024s' \
@@ -634,7 +635,7 @@ EOF
             "${arch}" \
             "${search_filename}" \
             "$(printf '%0.1s' "#"{1..1024})")" \
-        > "${work_dir}/grub/grubenv"
+        >"${work_dir}/grub/grubenv"
 }
 
 _make_bootmode_uefi-ia32.grub.esp() {
@@ -651,12 +652,12 @@ _make_bootmode_uefi-ia32.grub.esp() {
                  search_fs_file search_fs_uuid search_label serial sleep tpm udf usb usbserial_common usbserial_ftdi \
                  usbserial_pl2303 usbserial_usbdebug video xfs zstd)
     grub-mkstandalone -O i386-efi \
-                      --modules="${grubmodules[*]}" \
-                      --locales="en@quot" \
-                      --themes="" \
-                      --sbat=/usr/share/grub/sbat.csv \
-                      --disable-shim-lock \
-                      -o "${work_dir}/BOOTIA32.EFI" "boot/grub/grub.cfg=${work_dir}/grub-embed.cfg"
+        --modules="${grubmodules[*]}" \
+        --locales="en@quot" \
+        --themes="" \
+        --sbat=/usr/share/grub/sbat.csv \
+        --disable-shim-lock \
+        -o "${work_dir}/BOOTIA32.EFI" "boot/grub/grub.cfg=${work_dir}/grub-embed.cfg"
     # Add GRUB to the list of files used to calculate the required FAT image size.
     efiboot_files+=("${work_dir}/BOOTIA32.EFI"
                     "${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi")
@@ -728,12 +729,12 @@ _make_bootmode_uefi-x64.grub.esp() {
                  search_fs_file search_fs_uuid search_label serial sleep tpm udf usb usbserial_common usbserial_ftdi \
                  usbserial_pl2303 usbserial_usbdebug video xfs zstd)
     grub-mkstandalone -O x86_64-efi \
-                      --modules="${grubmodules[*]}" \
-                      --locales="en@quot" \
-                      --themes="" \
-                      --sbat=/usr/share/grub/sbat.csv \
-                      --disable-shim-lock \
-                      -o "${work_dir}/BOOTx64.EFI" "boot/grub/grub.cfg=${work_dir}/grub-embed.cfg"
+        --modules="${grubmodules[*]}" \
+        --locales="en@quot" \
+        --themes="" \
+        --sbat=/usr/share/grub/sbat.csv \
+        --disable-shim-lock \
+        -o "${work_dir}/BOOTx64.EFI" "boot/grub/grub.cfg=${work_dir}/grub-embed.cfg"
     # Add GRUB to the list of files used to calculate the required FAT image size.
     efiboot_files+=("${work_dir}/BOOTx64.EFI"
                     "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi")
@@ -866,7 +867,7 @@ _make_bootmode_uefi-x64.systemd-boot.eltorito() {
         sed "s|%ARCHISO_LABEL%|${iso_label}|g;
              s|%INSTALL_DIR%|${install_dir}|g;
              s|%ARCH%|${arch}|g" \
-            "${_conf}" > "${isofs_dir}/loader/entries/${_conf##*/}"
+            "${_conf}" >"${isofs_dir}/loader/entries/${_conf##*/}"
     done
 
     # edk2-shell based UEFI shell
@@ -928,13 +929,13 @@ _validate_requirements_bootmode_uefi-x64.systemd-boot.esp() {
     fi
 
     # Check if mkfs.fat is available
-    if ! command -v mkfs.fat &> /dev/null; then
+    if ! command -v mkfs.fat &>/dev/null; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating '${bootmode}': mkfs.fat is not available on this host. Install 'dosfstools'!" 0
     fi
 
     # Check if mmd and mcopy are available
-    if ! { command -v mmd &> /dev/null && command -v mcopy &> /dev/null; }; then
+    if ! { command -v mmd &>/dev/null && command -v mcopy &>/dev/null; }; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating '${bootmode}': mmd and/or mcopy are not available on this host. Install 'mtools'!" 0
     fi
@@ -978,7 +979,7 @@ _validate_requirements_bootmode_uefi-x64.systemd-boot.eltorito() {
 
 _validate_requirements_bootmode_uefi-ia32.grub.esp() {
     # Check if GRUB is available
-    if ! command -v grub-mkstandalone &> /dev/null; then
+    if ! command -v grub-mkstandalone &>/dev/null; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating '${bootmode}': grub-install is not available on this host. Install 'grub'!" 0
     fi
@@ -1005,19 +1006,19 @@ _validate_requirements_bootmode_uefi-x64.grub.esp() {
     fi
 
     # Check if GRUB is available
-    if ! command -v grub-mkstandalone &> /dev/null; then
+    if ! command -v grub-mkstandalone &>/dev/null; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating '${bootmode}': grub-install is not available on this host. Install 'grub'!" 0
     fi
 
         # Check if mkfs.fat is available
-    if ! command -v mkfs.fat &> /dev/null; then
+    if ! command -v mkfs.fat &>/dev/null; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating '${bootmode}': mkfs.fat is not available on this host. Install 'dosfstools'!" 0
     fi
 
     # Check if mmd and mcopy are available
-    if ! { command -v mmd &> /dev/null && command -v mcopy &> /dev/null; }; then
+    if ! { command -v mmd &>/dev/null && command -v mcopy &>/dev/null; }; then
         _msg_error "Validating '${bootmode}': mmd and/or mcopy are not available on this host. Install 'mtools'!" 0
     fi
 
@@ -1146,14 +1147,14 @@ _sign_netboot_artifacts() {
 }
 
 _validate_requirements_airootfs_image_type_squashfs() {
-    if ! command -v mksquashfs &> /dev/null; then
+    if ! command -v mksquashfs &>/dev/null; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating '${airootfs_image_type}': mksquashfs is not available on this host. Install 'squashfs-tools'!" 0
     fi
 }
 
 _validate_requirements_airootfs_image_type_ext4+squashfs() {
-    if ! { command -v mkfs.ext4 &> /dev/null && command -v tune2fs &> /dev/null; }; then
+    if ! { command -v mkfs.ext4 &>/dev/null && command -v tune2fs &>/dev/null; }; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating '${airootfs_image_type}': mkfs.ext4 and/or tune2fs is not available on this host. Install 'e2fsprogs'!" 0
     fi
@@ -1161,22 +1162,22 @@ _validate_requirements_airootfs_image_type_ext4+squashfs() {
 }
 
 _validate_requirements_airootfs_image_type_erofs() {
-    if ! command -v mkfs.erofs &> /dev/null; then
+    if ! command -v mkfs.erofs &>/dev/null; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating '${airootfs_image_type}': mkfs.erofs is not available on this host. Install 'erofs-utils'!" 0
     fi
 }
 
 _validate_common_requirements_buildmode_all() {
-    if ! command -v pacman &> /dev/null; then
+    if ! command -v pacman &>/dev/null; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating build mode '${_buildmode}': pacman is not available on this host. Install 'pacman'!" 0
     fi
-    if ! command -v find &> /dev/null; then
+    if ! command -v find &>/dev/null; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating build mode '${_buildmode}': find is not available on this host. Install 'findutils'!" 0
     fi
-    if ! command -v gzip &> /dev/null; then
+    if ! command -v gzip &>/dev/null; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating build mode '${_buildmode}': gzip is not available on this host. Install 'gzip'!" 0
     fi
@@ -1200,7 +1201,7 @@ _validate_requirements_buildmode_bootstrap() {
     fi
 
     _validate_common_requirements_buildmode_all
-    if ! command -v bsdtar &> /dev/null; then
+    if ! command -v bsdtar &>/dev/null; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating build mode '${_buildmode}': bsdtar is not available on this host. Install 'libarchive'!" 0
     fi
@@ -1237,15 +1238,15 @@ _validate_common_requirements_buildmode_iso_netboot() {
             _msg_error "Two certificates are required for codesigning netboot artifacts, but '${cert_list[*]}' is provided." 0
         fi
 
-        if ! command -v openssl &> /dev/null; then
+        if ! command -v openssl &>/dev/null; then
             (( validation_error=validation_error+1 ))
             _msg_error "Validating build mode '${_buildmode}': openssl is not available on this host. Install 'openssl'!" 0
         fi
     fi
 
     # Check if the specified airootfs_image_type is supported
-    if typeset -f "_mkairootfs_${airootfs_image_type}" &> /dev/null; then
-        if typeset -f "_validate_requirements_airootfs_image_type_${airootfs_image_type}" &> /dev/null; then
+    if typeset -f "_mkairootfs_${airootfs_image_type}" &>/dev/null; then
+        if typeset -f "_validate_requirements_airootfs_image_type_${airootfs_image_type}" &>/dev/null; then
             "_validate_requirements_airootfs_image_type_${airootfs_image_type}"
         else
             _msg_warning "Function '_validate_requirements_airootfs_image_type_${airootfs_image_type}' does not exist. Validating the requirements of '${airootfs_image_type}' airootfs image type will not be possible."
@@ -1265,8 +1266,8 @@ _validate_requirements_buildmode_iso() {
         _msg_error "No boot modes specified in '${profile}/profiledef.sh'." 0
     fi
     for bootmode in "${bootmodes[@]}"; do
-        if typeset -f "_make_bootmode_${bootmode}" &> /dev/null; then
-            if typeset -f "_validate_requirements_bootmode_${bootmode}" &> /dev/null; then
+        if typeset -f "_make_bootmode_${bootmode}" &>/dev/null; then
+            if typeset -f "_validate_requirements_bootmode_${bootmode}" &>/dev/null; then
                 "_validate_requirements_bootmode_${bootmode}"
             else
                 _msg_warning "Function '_validate_requirements_bootmode_${bootmode}' does not exist. Validating the requirements of '${bootmode}' boot mode will not be possible."
@@ -1277,7 +1278,7 @@ _validate_requirements_buildmode_iso() {
         fi
     done
 
-    if ! command -v awk &> /dev/null; then
+    if ! command -v awk &>/dev/null; then
         (( validation_error=validation_error+1 ))
         _msg_error "Validating build mode '${_buildmode}': awk is not available on this host. Install 'awk'!" 0
     fi
@@ -1350,7 +1351,7 @@ _add_xorrisofs_options_uefi-x64.systemd-boot.esp() {
         # A valid GPT prevents BIOS booting on some systems, instead use an invalid GPT (without a protective MBR).
         # The attached partition will have the EFI system partition type code in MBR, but in the invalid GPT it will
         # have a Microsoft basic partition type code.
-        if [[ ! " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.eltorito ' &&  ! " ${bootmodes[*]} " =~ ' uefi-ia32.grub.eltorito ' ]]; then
+        if [[ ! " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.eltorito ' && ! " ${bootmodes[*]} " =~ ' uefi-ia32.grub.eltorito ' ]]; then
             # If '-isohybrid-gpt-basdat' is specified before '-e', then the appended EFI system partition will have the
             # EFI system partition type ID/GUID in both MBR and GPT. If '-isohybrid-gpt-basdat' is specified after '-e',
             # the appended EFI system partition will have the Microsoft basic data type GUID in GPT.
@@ -1421,7 +1422,7 @@ _add_xorrisofs_options_uefi-x64.grub.esp() {
         # A valid GPT prevents BIOS booting on some systems, instead use an invalid GPT (without a protective MBR).
         # The attached partition will have the EFI system partition type code in MBR, but in the invalid GPT it will
         # have a Microsoft basic partition type code.
-        if [[ ! " ${bootmodes[*]} " =~ ' uefi-x64.grub.eltorito ' &&  ! " ${bootmodes[*]} " =~ ' uefi-ia32.grub.eltorito ' ]]; then
+        if [[ ! " ${bootmodes[*]} " =~ ' uefi-x64.grub.eltorito ' && ! " ${bootmodes[*]} " =~ ' uefi-ia32.grub.eltorito ' ]]; then
             # If '-isohybrid-gpt-basdat' is specified before '-e', then the appended EFI system partition will have the
             # EFI system partition type ID/GUID in both MBR and GPT. If '-isohybrid-gpt-basdat' is specified after '-e',
             # the appended EFI system partition will have the Microsoft basic data type GUID in GPT.
@@ -1488,7 +1489,7 @@ _build_bootstrap_image() {
     cd -- "${_bootstrap_parent}"
 
     _msg_info "Creating bootstrap image..."
-    bsdtar -cf - "root.${arch}" | gzip -cn9 > "${out_dir}/${image_name}"
+    bsdtar -cf - "root.${arch}" | gzip -cn9 >"${out_dir}/${image_name}"
     _msg_info "Done!"
     du -h -- "${out_dir}/${image_name}"
     cd -- "${OLDPWD}"
@@ -1515,24 +1516,24 @@ _build_iso_image() {
 
     # Add required xorrisofs options for each boot mode
     for bootmode in "${bootmodes[@]}"; do
-        typeset -f "_add_xorrisofs_options_${bootmode}" &> /dev/null && "_add_xorrisofs_options_${bootmode}"
+        typeset -f "_add_xorrisofs_options_${bootmode}" &>/dev/null && "_add_xorrisofs_options_${bootmode}"
     done
 
     rm -f -- "${out_dir}/${image_name}"
     _msg_info "Creating ISO image..."
     xorriso "${xorriso_options[@]}" -as mkisofs \
-            -iso-level 3 \
-            -full-iso9660-filenames \
-            -joliet \
-            -joliet-long \
-            -rational-rock \
-            -volid "${iso_label}" \
-            -appid "${iso_application}" \
-            -publisher "${iso_publisher}" \
-            -preparer "prepared by ${app_name}" \
-            "${xorrisofs_options[@]}" \
-            -output "${out_dir}/${image_name}" \
-            "${isofs_dir}/"
+        -iso-level 3 \
+        -full-iso9660-filenames \
+        -joliet \
+        -joliet-long \
+        -rational-rock \
+        -volid "${iso_label}" \
+        -appid "${iso_application}" \
+        -publisher "${iso_publisher}" \
+        -preparer "prepared by ${app_name}" \
+        "${xorrisofs_options[@]}" \
+        -output "${out_dir}/${image_name}" \
+        "${isofs_dir}/"
     _msg_info "Done!"
     du -h -- "${out_dir}/${image_name}"
 }
@@ -1592,8 +1593,8 @@ _validate_options() {
 
     # Check if the specified buildmodes are supported
     for _buildmode in "${buildmodes[@]}"; do
-        if typeset -f "_build_buildmode_${_buildmode}" &> /dev/null; then
-            if typeset -f "_validate_requirements_buildmode_${_buildmode}" &> /dev/null; then
+        if typeset -f "_build_buildmode_${_buildmode}" &>/dev/null; then
+            if typeset -f "_validate_requirements_buildmode_${_buildmode}" &>/dev/null; then
                 "_validate_requirements_buildmode_${_buildmode}"
             else
                 _msg_warning "Function '_validate_requirements_buildmode_${_buildmode}' does not exist. Validating the requirements of '${_buildmode}' build mode will not be possible."
@@ -1689,12 +1690,12 @@ _make_version() {
     _msg_info "Creating version files..."
     # Write version file to system installation dir
     rm -f -- "${pacstrap_dir}/version"
-    printf '%s\n' "${iso_version}" > "${pacstrap_dir}/version"
+    printf '%s\n' "${iso_version}" >"${pacstrap_dir}/version"
 
     if [[ "${buildmode}" == @("iso"|"netboot") ]]; then
         install -d -m 0755 -- "${isofs_dir}/${install_dir}"
         # Write version file to ISO 9660
-        printf '%s\n' "${iso_version}" > "${isofs_dir}/${install_dir}/version"
+        printf '%s\n' "${iso_version}" >"${isofs_dir}/${install_dir}/version"
 
     fi
     if [[ "${buildmode}" == "iso" ]]; then
@@ -1704,7 +1705,7 @@ _make_version() {
         rm -f -- "${isofs_dir}/${install_dir}/grubenv"
         printf '%.1024s' "$(printf '# GRUB Environment Block\nNAME=%s\nVERSION=%s\n%s' \
             "${iso_name}" "${iso_version}" "$(printf '%0.1s' "#"{1..1024})")" \
-            > "${isofs_dir}/${install_dir}/grubenv"
+            >"${isofs_dir}/${install_dir}/grubenv"
     fi
 
     # Append IMAGE_ID & IMAGE_VERSION to os-release
@@ -1716,7 +1717,7 @@ _make_version() {
         _msg_warning "os-release file '${_os_release}' is outside of valid path."
     else
         [[ ! -e "${_os_release}" ]] || sed -i '/^IMAGE_ID=/d;/^IMAGE_VERSION=/d' "${_os_release}"
-        printf 'IMAGE_ID=%s\nIMAGE_VERSION=%s\n' "${iso_name}" "${iso_version}" >> "${_os_release}"
+        printf 'IMAGE_ID=%s\nIMAGE_VERSION=%s\n' "${iso_name}" "${iso_version}" >>"${_os_release}"
     fi
 
     # Touch /usr/lib/clock-epoch to give another hint on date and time
@@ -1730,11 +1731,11 @@ _make_pkglist() {
     _msg_info "Creating a list of installed packages on live-enviroment..."
     case "${buildmode}" in
         "bootstrap")
-            pacman -Q --sysroot "${pacstrap_dir}" > "${pacstrap_dir}/pkglist.${arch}.txt"
+            pacman -Q --sysroot "${pacstrap_dir}" >"${pacstrap_dir}/pkglist.${arch}.txt"
             ;;
         "iso"|"netboot")
             install -d -m 0755 -- "${isofs_dir}/${install_dir}"
-            pacman -Q --sysroot "${pacstrap_dir}" > "${isofs_dir}/${install_dir}/pkglist.${arch}.txt"
+            pacman -Q --sysroot "${pacstrap_dir}" >"${isofs_dir}/${install_dir}/pkglist.${arch}.txt"
             ;;
     esac
     _msg_info "Done!"
@@ -1763,7 +1764,7 @@ _build_iso_base() {
     # Create working directory
     _run_once _make_work_dir
     # Write build date to file if it does not exist already
-    [[ -e "${work_dir}/build_date" ]] || printf '%s\n' "$SOURCE_DATE_EPOCH" > "${work_dir}/build_date"
+    [[ -e "${work_dir}/build_date" ]] || printf '%s\n' "$SOURCE_DATE_EPOCH" >"${work_dir}/build_date"
 
     [[ "${quiet}" == "y" ]] || _show_config
     _run_once _make_pacman_conf
@@ -1848,15 +1849,15 @@ _build() {
 
 while getopts 'c:p:C:L:P:A:D:w:m:o:g:G:vrh?' arg; do
     case "${arg}" in
-        p) read -r -a override_pkg_list <<< "${OPTARG}" ;;
+        p) read -r -a override_pkg_list <<<"${OPTARG}" ;;
         C) override_pacman_conf="${OPTARG}" ;;
         L) override_iso_label="${OPTARG}" ;;
         P) override_iso_publisher="${OPTARG}" ;;
         A) override_iso_application="${OPTARG}" ;;
         D) override_install_dir="${OPTARG}" ;;
-        c) read -r -a override_cert_list <<< "${OPTARG}" ;;
+        c) read -r -a override_cert_list <<<"${OPTARG}" ;;
         w) override_work_dir="${OPTARG}" ;;
-        m) read -r -a override_buildmodes <<< "${OPTARG}" ;;
+        m) read -r -a override_buildmodes <<<"${OPTARG}" ;;
         o) override_out_dir="${OPTARG}" ;;
         g) override_gpg_key="${OPTARG}" ;;
         G) override_gpg_sender="${OPTARG}" ;;
diff --git a/configs/releng/airootfs/root/.automated_script.sh b/configs/releng/airootfs/root/.automated_script.sh
index f257537..8e72bf7 100755
--- a/configs/releng/airootfs/root/.automated_script.sh
+++ b/configs/releng/airootfs/root/.automated_script.sh
@@ -1,17 +1,18 @@
 #!/usr/bin/env bash
 
-script_cmdline ()
-{
+script_cmdline() {
     local param
-    for param in $(< /proc/cmdline); do
+    for param in $(</proc/cmdline); do
         case "${param}" in
-            script=*) echo "${param#*=}" ; return 0 ;;
+            script=*)
+                echo "${param#*=}"
+                return 0
+                ;;
         esac
     done
 }
 
-automated_script ()
-{
+automated_script() {
     local script rt
     script="$(script_cmdline)"
     if [[ -n "${script}" && ! -x /tmp/startup_script ]]; then
diff --git a/configs/releng/airootfs/usr/local/bin/choose-mirror b/configs/releng/airootfs/usr/local/bin/choose-mirror
index b021945..d2349de 100755
--- a/configs/releng/airootfs/usr/local/bin/choose-mirror
+++ b/configs/releng/airootfs/usr/local/bin/choose-mirror
@@ -4,21 +4,22 @@
 
 get_cmdline() {
     local param
-    for param in $(< /proc/cmdline); do
+    for param in $(</proc/cmdline); do
         case "${param}" in
-            $1=*) echo "${param##*=}";
-            return 0
-            ;;
+            "${1}="*)
+                echo "${param##*=}"
+                return 0
+                ;;
         esac
     done
 }
 
-mirror=$(get_cmdline mirror)
-[[ $mirror = auto ]] && mirror=$(get_cmdline archiso_http_srv)
-[[ $mirror ]] || exit 0
+mirror="$(get_cmdline mirror)"
+[[ "$mirror" == 'auto' ]] && mirror="$(get_cmdline archiso_http_srv)"
+[[ -n "$mirror" ]] || exit 0
 
 mv /etc/pacman.d/mirrorlist /etc/pacman.d/mirrorlist.orig
-cat >/etc/pacman.d/mirrorlist << EOF
+cat >/etc/pacman.d/mirrorlist <<EOF
 #
 # Arch Linux repository mirrorlist
 # Generated by archiso
diff --git a/configs/releng/airootfs/usr/local/bin/livecd-sound b/configs/releng/airootfs/usr/local/bin/livecd-sound
index baae0d2..b92fcf2 100755
--- a/configs/releng/airootfs/usr/local/bin/livecd-sound
+++ b/configs/releng/airootfs/usr/local/bin/livecd-sound
@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 usage() {
-    cat <<- _EOF_
+    cat <<-_EOF_
     live cd sound helper script.
     Usage: livecdsound [OPTION]
     OPTIONS
@@ -14,14 +14,13 @@ usage() {
 _EOF_
 }
 
-bugout () {
+bugout() {
     printf "/usr/local/bin/livecdsound: programming error"
     stat_fail
 }
 
-echo_card_indices()
-{
-    if [ -f /proc/asound/cards ] ; then
+echo_card_indices() {
+    if [[ -f /proc/asound/cards ]]; then
         sed -n -e's/^[[:space:]]*\([0-7]\)[[:space:]].*/\1/p' /proc/asound/cards
     fi
 }
@@ -33,8 +32,8 @@ echo_card_indices()
 # $1 <card id>
 # $2 <control>
 # $3 <level>
-unmute_and_set_level(){
-    { [ "$3" ] &&[ "$2" ] && [ "$1" ] ; } || bugout
+unmute_and_set_level() {
+    [[ -n "$3" && -n "$2" && -n "$1" ]] || bugout
     systemd-cat -t "livecdsound" printf "Setting: %s on card: %s to %s\n" "$2" "$1" "$3"
     systemd-cat -t "livecdsound" amixer -c "$1" set "$2" "$3" unmute
     return 0
@@ -42,9 +41,8 @@ unmute_and_set_level(){
 
 # $1 <card id>
 # $2 <control>
-mute_and_zero_level()
-{
-    { [ "$1" ] && [ "$2" ] ; } || bugout
+mute_and_zero_level() {
+    [[ -n "$1" && -n "$2" ]] || bugout
     systemd-cat -t "livecdsound" printf "Muting control: %s on card: %s\n" "$2" "$1"
     systemd-cat -t "livecdsound" amixer -c "$1" set "$2" "0%" mute
     return 0
@@ -53,17 +51,15 @@ mute_and_zero_level()
 # $1 <card ID>
 # $2 <control>
 # $3 "on" | "off"
-switch_control()
-{
-    { [ "$3" ] && [ "$1" ] ; } || bugout
+switch_control() {
+    [[ -n "$3" && -n "$1" ]] || bugout
     systemd-cat -t "livecdsound" printf "Switching control: %s on card: %s to %s\n" "$2" "$1" "$3"
     systemd-cat -t "livecdsound" amixer -c "$1" set "$2" "$3"
     return 0
 }
 
 # $1 <card ID>
-sanify_levels_on_card()
-{
+sanify_levels_on_card() {
     unmute_and_set_level "$1" "Front" "80%"
     unmute_and_set_level "$1" "Master" "80%"
     unmute_and_set_level "$1" "Master Mono" "80%"
@@ -134,94 +130,89 @@ sanify_levels_on_card()
 }
 
 # $1 <card ID> | "all"
-sanify_levels()
-{
+sanify_levels() {
     local ttsdml_returnstatus=0
     local card
     case "$1" in
-              all)
-        for card in $(echo_card_indices) ; do
-            sanify_levels_on_card "$card" || ttsdml_returnstatus=1
-        done
-        ;;
-      *)
-        sanify_levels_on_card "$1" || ttsdml_returnstatus=1
-        ;;
+        all)
+            for card in $(echo_card_indices); do
+                sanify_levels_on_card "$card" || ttsdml_returnstatus=1
+            done
+            ;;
+        *)
+            sanify_levels_on_card "$1" || ttsdml_returnstatus=1
+            ;;
     esac
-    return $ttsdml_returnstatus
+    return "$ttsdml_returnstatus"
 }
 
 # List all cards that *should* be usable for PCM audio.  In my experience,
 # the console speaker (handled by the pcsp driver) isn't a suitable playback
 # device, so we'll exclude it.
-list_non_pcsp_cards()
-{
+list_non_pcsp_cards() {
     for card in $(echo_card_indices); do
         local cardfile="/proc/asound/card${card}/id"
-        if [ -r "$cardfile" ] && [ -f "$cardfile" ] && \
-            [ "$(cat "$cardfile")" != pcsp ]; then
+        if [[ -r "$cardfile" && -f "$cardfile" && "$(cat "$cardfile")" != pcsp ]]; then
             echo "$card"
         fi
     done
 }
 
 # Properly initialize the sound card so that we have audio at boot.
-unmute_all_cards()
-{
+unmute_all_cards() {
     sanify_levels all
 }
 
 is_numeric() {
-    local str=$1
+    local str="$1"
     [[ "$str" =~ ^[0-9]+$ ]]
 }
 
 set_default_card() {
-    local card=$1
-    sed -e "s/%card%/$card/g" < /usr/local/share/livecd-sound/asound.conf.in \
-        > /etc/asound.conf
+    local card="$1"
+    sed -e "s/%card%/$card/g" </usr/local/share/livecd-sound/asound.conf.in \
+        >/etc/asound.conf
 }
 
 play_on_card() {
-    local card=$1 file=$2
+    local card="$1" file="$2"
     aplay -q "-Dplughw:$card,0" "$file"
 }
 
 # If there are multiple usable sound cards, prompt the user to choose one,
 # using auditory feedback.
-pick_a_card()
-{
+pick_a_card() {
     set -f
     usable_cards="$(list_non_pcsp_cards)"
-    num_usable_cards="$(wc -w <<< "$usable_cards")"
+    num_usable_cards="$(wc -w <<<"$usable_cards")"
 
-    if [ "$num_usable_cards" -eq 1 ]; then
+    if (( num_usable_cards == 1 )); then
         systemd-cat -t "livecdsound" printf "Only one sound card is detected\n"
         exit 0
     fi
     systemd-cat -t "livecdsound" printf "multiple sound cards detected\n"
-    for card in $usable_cards; do
+    for card in "${usable_cards[@]}"; do
         if ! is_numeric "$card"; then
             continue
         fi
-        play_on_card "$card" /usr/share/livecd-sounds/pick-a-card.wav&
+        play_on_card "$card" /usr/share/livecd-sounds/pick-a-card.wav &
     done
     wait
     sleep 1
-    for card in $usable_cards; do
+    for card in "${usable_cards[@]}"; do
         if ! is_numeric "$card"; then
             continue
-    fi
-    play_on_card "$card" /usr/share/livecd-sounds/beep.wav
-    if read -r -t 10; then
-        systemd-cat -t "livecdsound" printf "Selecting %s sound card as default\n" "$card"
-        set_default_card "$card"
-        break
-    fi
-done
+        fi
+        play_on_card "$card" /usr/share/livecd-sounds/beep.wav
+        if read -r -t 10; then
+            systemd-cat -t "livecdsound" printf "Selecting %s sound card as default\n" "$card"
+            set_default_card "$card"
+            break
+        fi
+    done
 }
 
-if [[  $# -eq 0 ]]; then
+if (( $# == 0 )); then
     echo "error: No argument passed."
     exit 1
 fi
diff --git a/scripts/run_archiso.sh b/scripts/run_archiso.sh
index 6ddce15..87e5e25 100755
--- a/scripts/run_archiso.sh
+++ b/scripts/run_archiso.sh
@@ -11,7 +11,6 @@
 # - qemu
 # - edk2-ovmf (when UEFI booting)
 
-
 set -eu
 
 print_help() {