Send patches - preferably formatted by git format-patch - to patches at archlinux32 dot org.
summaryrefslogtreecommitdiff
path: root/archiso/mkarchiso
blob: 021bcfa5aebcdc7c8cde51e184dfa36c2967956c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
#!/usr/bin/env bash
#
# SPDX-License-Identifier: GPL-3.0-or-later

set -e -u

# Control the environment
umask 0022
export LANG="C"
export SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:-"$(date +%s)"}"

# Set application name from the script's file name
app_name="${0##*/}"

# Define global variables. All of them will be overwritten later
pkg_list=()
quiet=""
work_dir=""
out_dir=""
img_name=""
gpg_key=""
iso_name=""
iso_label=""
iso_publisher=""
iso_application=""
iso_version=""
install_dir=""
arch=""
pacman_conf=""
packages=""
bootmodes=()
airootfs_image_type=""
airootfs_image_tool_options=()
declare -A file_permissions=()


# Show an INFO message
# $1: message string
_msg_info() {
    local _msg="${1}"
    [[ "${quiet}" == "y" ]] || printf '[%s] INFO: %s\n' "${app_name}" "${_msg}"
}

# Show a WARNING message
# $1: message string
_msg_warning() {
    local _msg="${1}"
    printf '[%s] WARNING: %s\n' "${app_name}" "${_msg}" >&2
}

# Show an ERROR message then exit with status
# $1: message string
# $2: exit code number (with 0 does not exit)
_msg_error() {
    local _msg="${1}"
    local _error=${2}
    printf '[%s] ERROR: %s\n' "${app_name}" "${_msg}" >&2
    if (( _error > 0 )); then
        exit "${_error}"
    fi
}

_mount_airootfs() {
    trap "_umount_airootfs" EXIT HUP INT TERM
    install -d -m 0755 -- "${work_dir}/mnt/airootfs"
    _msg_info "Mounting '${airootfs_dir}.img' on '${work_dir}/mnt/airootfs'..."
    mount -- "${airootfs_dir}.img" "${work_dir}/mnt/airootfs"
    _msg_info "Done!"
}

_umount_airootfs() {
    _msg_info "Unmounting '${work_dir}/mnt/airootfs'..."
    umount -d -- "${work_dir}/mnt/airootfs"
    _msg_info "Done!"
    rmdir -- "${work_dir}/mnt/airootfs"
    trap - EXIT HUP INT TERM
}

# Show help usage, with an exit status.
# $1: exit status number.
_usage() {
    IFS='' read -r -d '' usagetext <<ENDUSAGETEXT || true
usage: ${app_name} [options] <profile_dir>
  options:
     -A <application> Set an application name for the ISO
                      Default: '${iso_application}'
     -C <file>        pacman configuration file.
                      Default: '${pacman_conf}'
     -D <install_dir> Set an install_dir. All files will by located here.
                      Default: '${install_dir}'
                      NOTE: Max 8 characters, use only [a-z0-9]
     -L <label>       Set the ISO volume label
                      Default: '${iso_label}'
     -P <publisher>   Set the ISO publisher
                      Default: '${iso_publisher}'
     -g <gpg_key>     Set the GPG key to be used for signing the sqashfs image
     -h               This message
     -o <out_dir>     Set the output directory
                      Default: '${out_dir}'
     -p PACKAGE(S)    Package(s) to install.
                      Multiple packages are provided as quoted, space delimited list.
     -v               Enable verbose output
     -w <work_dir>    Set the working directory
                      Default: '${work_dir}'

  profile_dir:        Directory of the archiso profile to build
ENDUSAGETEXT
    printf '%s' "${usagetext}"
    exit "${1}"
}

# Shows configuration options.
_show_config() {
    local build_date
    build_date="$(date --utc --iso-8601=seconds -d "@${SOURCE_DATE_EPOCH}")"
    _msg_info "${app_name} configuration settings"
    _msg_info "             Architecture:   ${arch}"
    _msg_info "        Working directory:   ${work_dir}"
    _msg_info "   Installation directory:   ${install_dir}"
    _msg_info "               Build date:   ${build_date}"
    _msg_info "         Output directory:   ${out_dir}"
    _msg_info "                  GPG key:   ${gpg_key:-None}"
    _msg_info "                  Profile:   ${profile}"
    _msg_info "Pacman configuration file:   ${pacman_conf}"
    _msg_info "          Image file name:   ${img_name}"
    _msg_info "         ISO volume label:   ${iso_label}"
    _msg_info "            ISO publisher:   ${iso_publisher}"
    _msg_info "          ISO application:   ${iso_application}"
    _msg_info "               Boot modes:   ${bootmodes[*]}"
    _msg_info "                 Packages:   ${pkg_list[*]}"
}

# Cleanup airootfs
_cleanup_airootfs() {
    _msg_info "Cleaning up what we can on airootfs..."

    # Delete all files in /boot
    [[ -d "${airootfs_dir}/boot" ]] && find "${airootfs_dir}/boot" -mindepth 1 -delete
    # Delete pacman database sync cache files (*.tar.gz)
    [[ -d "${airootfs_dir}/var/lib/pacman" ]] && find "${airootfs_dir}/var/lib/pacman" -maxdepth 1 -type f -delete
    # Delete pacman database sync cache
    [[ -d "${airootfs_dir}/var/lib/pacman/sync" ]] && find "${airootfs_dir}/var/lib/pacman/sync" -delete
    # Delete pacman package cache
    [[ -d "${airootfs_dir}/var/cache/pacman/pkg" ]] && find "${airootfs_dir}/var/cache/pacman/pkg" -type f -delete
    # Delete all log files, keeps empty dirs.
    [[ -d "${airootfs_dir}/var/log" ]] && find "${airootfs_dir}/var/log" -type f -delete
    # Delete all temporary files and dirs
    [[ -d "${airootfs_dir}/var/tmp" ]] && find "${airootfs_dir}/var/tmp" -mindepth 1 -delete
    # Delete package pacman related files.
    find "${work_dir}" \( -name '*.pacnew' -o -name '*.pacsave' -o -name '*.pacorig' \) -delete
    # Create an empty /etc/machine-id
    printf '' > "${airootfs_dir}/etc/machine-id"

    _msg_info "Done!"
}

_run_mksquashfs() {
    # Set default mksquashfs options
    if (( ${#airootfs_image_tool_options[@]} < 1 )); then
        airootfs_image_tool_options=('-comp' 'xz')
    fi

    local image_path="${isofs_dir}/${install_dir}/${arch}/airootfs.sfs"
    if [[ "${quiet}" == "y" ]]; then
        mksquashfs "$@" "${image_path}" -noappend "${airootfs_image_tool_options[@]}" -no-progress > /dev/null
    else
        mksquashfs "$@" "${image_path}" -noappend "${airootfs_image_tool_options[@]}"
    fi
}

# Makes a ext4 filesystem inside a SquashFS from a source directory.
_mkairootfs_ext4+squashfs() {
    [[ -e "${airootfs_dir}" ]] || _msg_error "The path '${airootfs_dir}' does not exist" 1

    _msg_info "Creating ext4 image of 32 GiB..."
    if [[ "${quiet}" == "y" ]]; then
        mkfs.ext4 -q -O '^has_journal,^resize_inode' -E 'lazy_itable_init=0' -m 0 -F -- "${airootfs_dir}.img" 32G
    else
        mkfs.ext4 -O '^has_journal,^resize_inode' -E 'lazy_itable_init=0' -m 0 -F -- "${airootfs_dir}.img" 32G
    fi
    tune2fs -c 0 -i 0 -- "${airootfs_dir}.img" > /dev/null
    _msg_info "Done!"
    _mount_airootfs
    _msg_info "Copying '${airootfs_dir}/' to '${work_dir}/mnt/airootfs/'..."
    cp -aT -- "${airootfs_dir}/" "${work_dir}/mnt/airootfs/"
    chown -- 0:0 "${work_dir}/mnt/airootfs/"
    _msg_info "Done!"
    _umount_airootfs
    install -d -m 0755 -- "${isofs_dir}/${install_dir}/${arch}"
    _msg_info "Creating SquashFS image, this may take some time..."
    _run_mksquashfs "${airootfs_dir}.img"
    _msg_info "Done!"
    rm -- "${airootfs_dir}.img"
}

# Makes a SquashFS filesystem from a source directory.
_mkairootfs_squashfs() {
    [[ -e "${airootfs_dir}" ]] || _msg_error "The path '${airootfs_dir}' does not exist" 1

    install -d -m 0755 -- "${isofs_dir}/${install_dir}/${arch}"
    _msg_info "Creating SquashFS image, this may take some time..."
    _run_mksquashfs "${airootfs_dir}"
    _msg_info "Done!"
}

_mkchecksum() {
    _msg_info "Creating checksum file for self-test..."
    cd -- "${isofs_dir}/${install_dir}/${arch}"
    sha512sum airootfs.sfs > airootfs.sha512
    cd -- "${OLDPWD}"
    _msg_info "Done!"
}

_mksignature() {
    _msg_info "Signing SquashFS image..."
    cd -- "${isofs_dir}/${install_dir}/${arch}"
    gpg --detach-sign --default-key "${gpg_key}" airootfs.sfs
    cd -- "${OLDPWD}"
    _msg_info "Done!"
}

# Helper function to run functions only one time.
_run_once() {
    if [[ ! -e "${work_dir}/build.${1}" ]]; then
        "$1"
        touch "${work_dir}/build.${1}"
    fi
}

# 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' ' ')"

    # 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}" != "${_profile_cache_dirs}" ]]; then
        _cache_dirs="${_profile_cache_dirs}"
    else
        _cache_dirs="${_system_cache_dirs}"
    fi

    _msg_info "Copying custom pacman.conf to work directory..."
    _msg_info "Using pacman CacheDir: ${_cache_dirs}"
    # take the profile pacman.conf and strip all settings that would break in chroot when using pacman -r
    # append CacheDir and HookDir to [options] section
    # HookDir is *always* set to the airootfs' override directory
    # see `man 8 pacman` for further info
    pacman-conf --config "${pacman_conf}" | \
        sed "/CacheDir/d;/DBPath/d;/HookDir/d;/LogFile/d;/RootDir/d;/\[options\]/a CacheDir = ${_cache_dirs}
        /\[options\]/a HookDir = ${airootfs_dir}/etc/pacman.d/hooks/" > "${work_dir}/pacman.conf"
}

# Prepare working directory and copy custom airootfs files (airootfs)
_make_custom_airootfs() {
    local passwd=()
    local filename permissions

    install -d -m 0755 -o 0 -g 0 -- "${airootfs_dir}"

    if [[ -d "${profile}/airootfs" ]]; then
        _msg_info "Copying custom airootfs files..."
        cp -af --no-preserve=ownership,mode -- "${profile}/airootfs/." "${airootfs_dir}"
        # Set ownership and mode for files and directories
        for filename in "${!file_permissions[@]}"; do
            IFS=':' read -ra permissions <<< "${file_permissions["${filename}"]}"
            # Prevent file path traversal outside of $airootfs_dir
            if [[ "$(realpath -q -- "${airootfs_dir}${filename}")" != "${airootfs_dir}"* ]]; then
                _msg_error "Failed to set permissions on '${airootfs_dir}${filename}'. Outside of valid path." 1
            # Warn if the file does not exist
            elif [[ ! -e "${airootfs_dir}${filename}" ]]; then
                _msg_warning "Cannot change permissions of '${airootfs_dir}${filename}'. The file or directory does not exist."
            else
                chown -fh -- "${permissions[0]}:${permissions[1]}" "${airootfs_dir}${filename}"
                chmod -f -- "${permissions[2]}" "${airootfs_dir}${filename}"
            fi
        done
        _msg_info "Done!"
    fi
}

# Install desired packages to airootfs
_make_packages() {
    _msg_info "Installing packages to '${airootfs_dir}/'..."

    if [[ -n "${gpg_key}" ]]; then
        exec {ARCHISO_GNUPG_FD}<>"${work_dir}/pubkey.gpg"
        export ARCHISO_GNUPG_FD
    fi

    if [[ "${quiet}" = "y" ]]; then
        pacstrap -C "${work_dir}/pacman.conf" -c -G -M -- "${airootfs_dir}" "${pkg_list[@]}" &> /dev/null
    else
        pacstrap -C "${work_dir}/pacman.conf" -c -G -M -- "${airootfs_dir}" "${pkg_list[@]}"
    fi

    if [[ -n "${gpg_key}" ]]; then
        exec {ARCHISO_GNUPG_FD}<&-
        unset ARCHISO_GNUPG_FD
    fi

    _msg_info "Done! Packages installed successfully."
}

# Customize installation (airootfs)
_make_customize_airootfs() {
    local passwd=()

    if [[ -e "${profile}/airootfs/etc/passwd" ]]; then
        _msg_info "Copying /etc/skel/* to user homes..."
        while IFS=':' read -a passwd -r; do
            # Only operate on UIDs in range 1000–59999
            (( passwd[2] >= 1000 && passwd[2] < 60000 )) || continue
            # Skip invalid home directories
            [[ "${passwd[5]}" == '/' ]] && continue
            [[ -z "${passwd[5]}" ]] && continue
            # Prevent path traversal outside of $airootfs_dir
            if [[ "$(realpath -q -- "${airootfs_dir}${passwd[5]}")" == "${airootfs_dir}"* ]]; then
                if [[ ! -d "${airootfs_dir}${passwd[5]}" ]]; then
                    install -d -m 0750 -o "${passwd[2]}" -g "${passwd[3]}" -- "${airootfs_dir}${passwd[5]}"
                fi
                cp -dnRT --preserve=mode,timestamps,links -- "${airootfs_dir}/etc/skel/." "${airootfs_dir}${passwd[5]}"
                chmod -f 0750 -- "${airootfs_dir}${passwd[5]}"
                chown -hR -- "${passwd[2]}:${passwd[3]}" "${airootfs_dir}${passwd[5]}"
            else
                _msg_error "Failed to set permissions on '${airootfs_dir}${passwd[5]}'. Outside of valid path." 1
            fi
        done < "${profile}/airootfs/etc/passwd"
        _msg_info "Done!"
    fi

    if [[ -e "${airootfs_dir}/root/customize_airootfs.sh" ]]; then
        _msg_info "Running customize_airootfs.sh in '${airootfs_dir}' chroot..."
        _msg_warning "customize_airootfs.sh is deprecated! Support for it will be removed in a future archiso version."
        chmod -f -- +x "${airootfs_dir}/root/customize_airootfs.sh"
        eval -- arch-chroot "${airootfs_dir}" "/root/customize_airootfs.sh"
        rm -- "${airootfs_dir}/root/customize_airootfs.sh"
        _msg_info "Done! customize_airootfs.sh run successfully."
    fi
}

# Set up boot loaders
_make_bootmodes() {
    local bootmode
    for bootmode in "${bootmodes[@]}"; do
        _run_once "_make_bootmode_${bootmode}"
    done
}

# Prepare kernel/initramfs ${install_dir}/boot/
_make_boot_on_iso9660() {
    local ucode_image
    _msg_info "Preparing kernel and initramfs for the ISO 9660 file system..."
    install -d -m 0755 -- "${isofs_dir}/${install_dir}/boot/${arch}"
    install -m 0644 -- "${airootfs_dir}/boot/initramfs-"*".img" "${isofs_dir}/${install_dir}/boot/${arch}/"
    install -m 0644 -- "${airootfs_dir}/boot/vmlinuz-"* "${isofs_dir}/${install_dir}/boot/${arch}/"

    for ucode_image in {intel-uc.img,intel-ucode.img,amd-uc.img,amd-ucode.img,early_ucode.cpio,microcode.cpio}; do
        if [[ -e "${airootfs_dir}/boot/${ucode_image}" ]]; then
            install -m 0644 -- "${airootfs_dir}/boot/${ucode_image}" "${isofs_dir}/${install_dir}/boot/"
            if [[ -e "${airootfs_dir}/usr/share/licenses/${ucode_image%.*}/" ]]; then
                install -d -m 0755 -- "${isofs_dir}/${install_dir}/boot/licenses/${ucode_image%.*}/"
                install -m 0644 -- "${airootfs_dir}/usr/share/licenses/${ucode_image%.*}/"* \
                    "${isofs_dir}/${install_dir}/boot/licenses/${ucode_image%.*}/"
            fi
        fi
    done
    _msg_info "Done!"
}

# Prepare /syslinux for booting from MBR
_make_bootmode_bios.syslinux.mbr() {
    _msg_info "Setting up SYSLINUX for BIOS booting from a disk..."
    install -d -m 0755 -- "${isofs_dir}/syslinux"
    for _cfg in "${profile}/syslinux/"*.cfg; do
        sed "s|%ARCHISO_LABEL%|${iso_label}|g;
             s|%INSTALL_DIR%|${install_dir}|g;
             s|%ARCH%|${arch}|g" \
             "${_cfg}" > "${isofs_dir}/syslinux/${_cfg##*/}"
    done
    if [[ -e "${profile}/syslinux/splash.png" ]]; then
        install -m 0644 -- "${profile}/syslinux/splash.png" "${isofs_dir}/syslinux/"
    fi
    install -m 0644 -- "${airootfs_dir}/usr/lib/syslinux/bios/"*.c32 "${isofs_dir}/syslinux/"
    install -m 0644 -- "${airootfs_dir}/usr/lib/syslinux/bios/lpxelinux.0" "${isofs_dir}/syslinux/"
    install -m 0644 -- "${airootfs_dir}/usr/lib/syslinux/bios/memdisk" "${isofs_dir}/syslinux/"

    _run_once _make_boot_on_iso9660

    if [[ -e "${isofs_dir}/syslinux/hdt.c32" ]]; then
        install -d -m 0755 -- "${isofs_dir}/syslinux/hdt"
        if [[ -e "${airootfs_dir}/usr/share/hwdata/pci.ids" ]]; then
            gzip -c -9 "${airootfs_dir}/usr/share/hwdata/pci.ids" > \
                "${isofs_dir}/syslinux/hdt/pciids.gz"
        fi
        find "${airootfs_dir}/usr/lib/modules" -name 'modules.alias' -print -exec gzip -c -9 '{}' ';' -quit > \
            "${isofs_dir}/syslinux/hdt/modalias.gz"
    fi

    # Add other aditional/extra files to ${install_dir}/boot/
    if [[ -e "${airootfs_dir}/boot/memtest86+/memtest.bin" ]]; then
        # rename for PXE: https://wiki.archlinux.org/index.php/Syslinux#Using_memtest
        install -m 0644 -- "${airootfs_dir}/boot/memtest86+/memtest.bin" "${isofs_dir}/${install_dir}/boot/memtest"
        install -d -m 0755 -- "${isofs_dir}/${install_dir}/boot/licenses/memtest86+/"
        install -m 0644 -- "${airootfs_dir}/usr/share/licenses/common/GPL2/license.txt" \
            "${isofs_dir}/${install_dir}/boot/licenses/memtest86+/"
    fi
    _msg_info "Done! SYSLINUX set up for BIOS booting from a disk successfully."
}

# Prepare /syslinux for El-Torito booting
_make_bootmode_bios.syslinux.eltorito() {
    _msg_info "Setting up SYSLINUX for BIOS booting from an optical disc..."
    install -d -m 0755 -- "${isofs_dir}/syslinux"
    install -m 0644 -- "${airootfs_dir}/usr/lib/syslinux/bios/isolinux.bin" "${isofs_dir}/syslinux/"
    install -m 0644 -- "${airootfs_dir}/usr/lib/syslinux/bios/isohdpfx.bin" "${isofs_dir}/syslinux/"

    # ISOLINUX and SYSLINUX installation is shared
    _run_once _make_bootmode_bios.syslinux.mbr

    _msg_info "Done! SYSLINUX set up for BIOS booting from an optical disc successfully."
}

# Prepare /EFI on ISO-9660
_make_efi_dir_on_iso9660() {
    _msg_info "Preparing an /EFI directory for the ISO 9660 file system..."
    install -d -m 0755 -- "${isofs_dir}/EFI/BOOT"
    install -m 0644 -- "${airootfs_dir}/usr/lib/systemd/boot/efi/systemd-bootx64.efi" \
        "${isofs_dir}/EFI/BOOT/BOOTx64.EFI"

    install -d -m 0755 -- "${isofs_dir}/loader/entries"
    install -m 0644 -- "${profile}/efiboot/loader/loader.conf" "${isofs_dir}/loader/"

    for _conf in "${profile}/efiboot/loader/entries/"*".conf"; do
        sed "s|%ARCHISO_LABEL%|${iso_label}|g;
             s|%INSTALL_DIR%|${install_dir}|g;
             s|%ARCH%|${arch}|g" \
            "${_conf}" > "${isofs_dir}/loader/entries/${_conf##*/}"
    done

    # edk2-shell based UEFI shell
    # shellx64.efi is picked up automatically when on /
    if [[ -e "${airootfs_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ]]; then
        install -m 0644 -- "${airootfs_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" "${isofs_dir}/shellx64.efi"
    fi
    _msg_info "Done!"
}

# Prepare kernel/initramfs on efiboot.img
_make_boot_on_fat() {
    local ucode_image all_ucode_images=()
    _msg_info "Preparing kernel and initramfs for the FAT file system..."
    mmd -i "${work_dir}/efiboot.img" \
        "::/${install_dir}" "::/${install_dir}/boot" "::/${install_dir}/boot/${arch}"
    mcopy -i "${work_dir}/efiboot.img" "${airootfs_dir}/boot/vmlinuz-"* \
        "${airootfs_dir}/boot/initramfs-"*".img" "::/${install_dir}/boot/${arch}/"
    for ucode_image in \
        "${airootfs_dir}/boot/"{intel-uc.img,intel-ucode.img,amd-uc.img,amd-ucode.img,early_ucode.cpio,microcode.cpio}
    do
        if [[ -e "${ucode_image}" ]]; then
            all_ucode_images+=("${ucode_image}")
        fi
    done
    if (( ${#all_ucode_images[@]} )); then
        mcopy -i "${work_dir}/efiboot.img" "${all_ucode_images[@]}" "::/${install_dir}/boot/"
    fi
    _msg_info "Done!"
}

# Prepare efiboot.img::/EFI for EFI boot mode
_make_bootmode_uefi-x64.systemd-boot.esp() {
    local efiboot_imgsize="0"
    _msg_info "Setting up systemd-boot for UEFI booting..."

    # the required image size in KiB (rounded up to the next full MiB with an additional MiB for reserved sectors)
    efiboot_imgsize="$(du -bc \
        "${airootfs_dir}/usr/lib/systemd/boot/efi/systemd-bootx64.efi" \
        "${airootfs_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" \
        "${profile}/efiboot/" \
        "${airootfs_dir}/boot/vmlinuz-"* \
        "${airootfs_dir}/boot/initramfs-"*".img" \
        "${airootfs_dir}/boot/"{intel-uc.img,intel-ucode.img,amd-uc.img,amd-ucode.img,early_ucode.cpio,microcode.cpio} \
        2>/dev/null | 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($1)+1024)/1024))}'
        )"
    # The FAT image must be created with mkfs.fat not mformat, as some systems have issues with mformat made images:
    # https://lists.gnu.org/archive/html/grub-devel/2019-04/msg00099.html
    [[ -e "${work_dir}/efiboot.img" ]] && rm -f -- "${work_dir}/efiboot.img"
    _msg_info "Creating FAT image of size: ${efiboot_imgsize} KiB..."
    mkfs.fat -C -n ARCHISO_EFI "${work_dir}/efiboot.img" "$efiboot_imgsize"

    mmd -i "${work_dir}/efiboot.img" ::/EFI ::/EFI/BOOT
    mcopy -i "${work_dir}/efiboot.img" \
        "${airootfs_dir}/usr/lib/systemd/boot/efi/systemd-bootx64.efi" ::/EFI/BOOT/BOOTx64.EFI

    mmd -i "${work_dir}/efiboot.img" ::/loader ::/loader/entries
    mcopy -i "${work_dir}/efiboot.img" "${profile}/efiboot/loader/loader.conf" ::/loader/
    for _conf in "${profile}/efiboot/loader/entries/"*".conf"; do
        sed "s|%ARCHISO_LABEL%|${iso_label}|g;
             s|%INSTALL_DIR%|${install_dir}|g;
             s|%ARCH%|${arch}|g" \
            "${_conf}" | mcopy -i "${work_dir}/efiboot.img" - "::/loader/entries/${_conf##*/}"
    done

    # shellx64.efi is picked up automatically when on /
    if [[ -e "${airootfs_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ]]; then
        mcopy -i "${work_dir}/efiboot.img" \
            "${airootfs_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ::/shellx64.efi
    fi

    # Copy kernel and initramfs
    _make_boot_on_fat

    _msg_info "Done! systemd-boot set up for UEFI booting successfully."
}

# Prepare efiboot.img::/EFI for "El Torito" EFI boot mode
_make_bootmode_uefi-x64.systemd-boot.eltorito() {
    _run_once _make_bootmode_uefi-x64.systemd-boot.esp
    # Set up /EFI on ISO-9660 to allow preparing an installation medium by manually copying files
    _run_once _make_efi_dir_on_iso9660
}

_validate_requirements_bootmode_bios.syslinux.mbr() {
    # bios.syslinux.mbr requires bios.syslinux.eltorito
    # shellcheck disable=SC2076
    if [[ ! " ${bootmodes[*]} " =~ ' bios.syslinux.eltorito ' ]]; then
        (( validation_error=validation_error+1 ))
        _msg_error "Using 'bios.syslinux.mbr' boot mode without 'bios.syslinux.eltorito' is not supported." 0
    fi

    # Check if the syslinux package is in the package list
    # shellcheck disable=SC2076
    if [[ ! " ${pkg_list[*]} " =~ ' syslinux ' ]]; then
        (( validation_error=validation_error+1 ))
        _msg_error "Validating '${bootmode}': The 'syslinux' package is missing from the package list!" 0
    fi

    # Check if syslinux configuration files exist
    if [[ ! -d "${profile}/syslinux" ]]; then
        (( validation_error=validation_error+1 ))
        _msg_error "Validating '${bootmode}': The '${profile}/syslinux' directory is missing!" 0
    else
        local cfgfile
        for cfgfile in "${profile}/syslinux/"*'.cfg'; do
            if [[ -e "${cfgfile}" ]]; then
                break
            else
                (( validation_error=validation_error+1 ))
                _msg_error "Validating '${bootmode}': No configuration file found in '${profile}/syslinux/'!" 0
            fi
        done
    fi

    # Check for optional packages
    # shellcheck disable=SC2076
    if [[ ! " ${pkg_list[*]} " =~ ' memtest86+ ' ]]; then
        _msg_info "Validating '${bootmode}': 'memtest86+' is not in the package list. Memmory testing will not be available from syslinux."
    fi
}

_validate_requirements_bootmode_bios.syslinux.eltorito() {
    _validate_requirements_bootmode_bios.syslinux.mbr
}

_validate_requirements_bootmode_uefi-x64.systemd-boot.esp() {
    # Check if mkfs.fat is available
    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
        _msg_error "Validating '${bootmode}': mmd and/or mcopy are not available on this host. Install 'mtools'!" 0
    fi

    # Check if systemd-boot configuration files exist
    if [[ ! -d "${profile}/efiboot/loader/entries" ]]; then
        (( validation_error=validation_error+1 ))
        _msg_error "Validating '${bootmode}': The '${profile}/efiboot/loader/entries' directory is missing!" 0
    else
        if [[ ! -e "${profile}/efiboot/loader/loader.conf" ]]; then
            (( validation_error=validation_error+1 ))
            _msg_error "Validating '${bootmode}': File '${profile}/efiboot/loader/loader.conf' not found!" 0
        fi
        local conffile
        for conffile in "${profile}/efiboot/loader/entries/"*'.conf'; do
            if [[ -e "${conffile}" ]]; then
                break
            else
                (( validation_error=validation_error+1 ))
                _msg_error "Validating '${bootmode}': No configuration file found in '${profile}/efiboot/loader/entries/'!" 0
            fi
        done
    fi

    # Check for optional packages
    # shellcheck disable=SC2076
    if [[ ! " ${pkg_list[*]} " =~ ' edk2-shell ' ]]; then
        _msg_info "'edk2-shell' is not in the package list. The ISO will not contain a bootable UEFI shell."
    fi
}

_validate_requirements_bootmode_uefi-x64.systemd-boot.eltorito() {
    # uefi-x64.systemd-boot.eltorito has the exact same requirements as uefi-x64.systemd-boot.esp
    _validate_requirements_bootmode_uefi-x64.systemd-boot.esp
}

# Build airootfs filesystem image
_prepare_airootfs_image() {
    _run_once "_mkairootfs_${airootfs_image_type}"
    _mkchecksum
    if [[ -n "${gpg_key}" ]]; then
        _mksignature
    fi
}

_validate_requirements_airootfs_image_type_squashfs() {
    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
        (( 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
    _validate_requirements_airootfs_image_type_squashfs
}

# SYSLINUX El Torito
_add_xorrisofs_options_bios.syslinux.eltorito() {
    xorrisofs_options+=(
        # El Torito boot image for x86 BIOS
        '-eltorito-boot' 'syslinux/isolinux.bin'
        # El Torito boot catalog file
        '-eltorito-catalog' 'syslinux/boot.cat'
        # Required options to boot with ISOLINUX
        '-no-emul-boot' '-boot-load-size' '4' '-boot-info-table'
    )
}

# SYSLINUX MBR
_add_xorrisofs_options_bios.syslinux.mbr() {
    xorrisofs_options+=(
        # SYSLINUX MBR bootstrap code; does not work without "-eltorito-boot syslinux/isolinux.bin"
        '-isohybrid-mbr' "${isofs_dir}/syslinux/isohdpfx.bin"
        # When GPT is used, create an additional partition in the MBR (besides 0xEE) for sectors 0–1 (MBR
        # bootstrap code area) and mark it as bootable
        # This violates the UEFI specification, but may allow booting on some systems
        # https://wiki.archlinux.org/index.php/Partitioning#Tricking_old_BIOS_into_booting_from_GPT
        '--mbr-force-bootable'
        # Set the ISO 9660 partition's type to "Linux filesystem data"
        # When only MBR is present, the partition type ID will be 0x83 "Linux" as xorriso translates all
        # GPT partition type GUIDs except for the ESP GUID to MBR type ID 0x83
        '-iso_mbr_part_type' '0FC63DAF-8483-4772-8E79-3D69D8477DE4'
        # Move the first partition away from the start of the ISO to match the expectations of partition
        # editors
        # May allow booting on some systems
        # https://dev.lovelyhq.com/libburnia/libisoburn/src/branch/master/doc/partition_offset.wiki
        '-partition_offset' '16'
    )
}

# systemd-boot in an attached EFI system partition
_add_xorrisofs_options_uefi-x64.systemd-boot.esp() {
    # Move the first partition away from the start of the ISO, otherwise the GPT will not be valid and ISO 9660
    # partition will not be mountable
    # shellcheck disable=SC2076
    [[ " ${xorrisofs_options[*]} " =~ ' -partition_offset ' ]] || xorrisofs_options+=('-partition_offset' '16')
    xorrisofs_options+=(
        # Attach efiboot.img as a second partition and set its partition type to "EFI system partition"
        '-append_partition' '2' 'C12A7328-F81F-11D2-BA4B-00A0C93EC93B' "${work_dir}/efiboot.img"
        # Ensure GPT is used as some systems do not support UEFI booting without it
        '-appended_part_as_gpt'
    )
}

# systemd-boot via El Torito
_add_xorrisofs_options_uefi-x64.systemd-boot.eltorito() {
    # shellcheck disable=SC2076
    if [[ " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.esp ' ]]; then
        # systemd-boot in an attached EFI system partition via El Torito
        xorrisofs_options+=(
            # Start a new El Torito boot entry for UEFI
            '-eltorito-alt-boot'
            # Set the second partition as the El Torito UEFI boot image
            '-e' '--interval:appended_partition_2:all::'
            # Boot image is not emulating floppy or hard disk; required for all known boot loaders
            '-no-emul-boot'
        )
    else
        # The ISO will not contain a GPT partition table, so to be able to reference efiboot.img, place it as a
        # file inside the ISO 9660 file system
        install -d -m 0755 -- "${isofs_dir}/EFI/archiso"
        cp -a -- "${work_dir}/efiboot.img" "${isofs_dir}/EFI/archiso/efiboot.img"
        # systemd-boot in an embedded efiboot.img via El Torito
        xorrisofs_options+=(
            # Start a new El Torito boot entry for UEFI
            '-eltorito-alt-boot'
            # Set efiboot.img as the El Torito UEFI boot image
            '-e' 'EFI/archiso/efiboot.img'
            # Boot image is not emulating floppy or hard disk; required for all known boot loaders
            '-no-emul-boot'
        )
    fi
    # Specify where to save the El Torito boot catalog file in case it is not already set by bios.syslinux.eltorito
    # shellcheck disable=SC2076
    [[ " ${bootmodes[*]} " =~ ' bios.' ]] || xorrisofs_options+=('-eltorito-catalog' 'EFI/boot.cat')
}

# Build ISO
_build_iso() {
    local xorrisofs_options=()
    local bootmode

    [[ -d "${out_dir}" ]] || install -d -- "${out_dir}"

    [[ "${quiet}" == "y" ]] && xorrisofs_options+=('-quiet')

    # 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}"
    done

    _msg_info "Creating ISO image..."
    xorriso -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 "${out_dir}/${img_name}" \
            "${isofs_dir}/"
    _msg_info "Done!"
    du -h -- "${out_dir}/${img_name}"
}

# Read profile's values from profiledef.sh
_read_profile() {
    if [[ -z "${profile}" ]]; then
        _msg_error "No profile specified!" 1
    fi
    if [[ ! -d "${profile}" ]]; then
        _msg_error "Profile '${profile}' does not exist!" 1
    elif [[ ! -e "${profile}/profiledef.sh" ]]; then
        _msg_error "Profile '${profile}' is missing 'profiledef.sh'!" 1
    else
        cd -- "${profile}"

        # Source profile's variables
        # shellcheck source=configs/releng/profiledef.sh
        . "${profile}/profiledef.sh"

        # Resolve paths of files that are expected to reside in the profile's directory
        [[ -n "$packages" ]] || packages="${profile}/packages.${arch}"
        packages="$(realpath -- "${packages}")"
        pacman_conf="$(realpath -- "${pacman_conf}")"

        cd -- "${OLDPWD}"
    fi
}

# Validate set options
_validate_options() {
    local validation_error=0 bootmode
    local pkg_list_from_file=()
    _msg_info "Validating options..."
    # Check if the package list file exists and read packages from it
    if [[ -e "${packages}" ]]; then
        mapfile -t pkg_list_from_file < <(sed '/^[[:blank:]]*#.*/d;s/#.*//;/^[[:blank:]]*$/d' "${packages}")
        pkg_list+=("${pkg_list_from_file[@]}")
        if (( ${#pkg_list_from_file} < 1 )); then
            (( validation_error=validation_error+1 ))
            _msg_error "No package specified in '${packages}'." 0
        fi
    else
        (( validation_error=validation_error+1 ))
        _msg_error "File '${packages}' does not exist." 0

    fi

    # Check if pacman configuration file exists
    if [[ ! -e "${pacman_conf}" ]]; then
        (( validation_error=validation_error+1 ))
        _msg_error "File '${pacman_conf}' does not exist." 0
    fi
    # Check if the specified bootmodes are supported
    for bootmode in "${bootmodes[@]}"; do
        if typeset -f "_make_bootmode_${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."
            fi
        else
            (( validation_error=validation_error+1 ))
            _msg_error "${bootmode} is not a valid boot mode!" 0
        fi
    done
    # Check if the specified airootfs_image_type is supported
    if typeset -f "_mkairootfs_${airootfs_image_type}" &> /dev/null; then
        if typeset -f "_validate_requirements_airootfs_image_type_${airootfs_image_type}" &> /dev/null; then
            "_validate_requirements_airootfs_image_type_${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."
        fi
    else
        (( validation_error=validation_error+1 ))
        _msg_error "Unsupported image type: '${airootfs_image_type}'" 0
    fi
    if (( validation_error )); then
        _msg_error "${validation_error} errors were encountered while validating the profile. Aborting." 1
    fi
    _msg_info "Done!"
}

# Set defaults and, if present, overrides from mkarchiso command line option parameters
_set_overrides() {
    # Set variables that have command line overrides
    if [[ -v override_work_dir ]]; then
        work_dir="$override_work_dir"
    elif [[ -z "$work_dir" ]]; then
        work_dir='./work'
    fi
    work_dir="$(realpath -- "$work_dir")"
    if [[ -v override_out_dir ]]; then
        out_dir="$override_out_dir"
    elif [[ -z "$out_dir" ]]; then
        out_dir='./out'
    fi
    out_dir="$(realpath -- "$out_dir")"
    if [[ -v override_pacman_conf ]]; then
        pacman_conf="$override_pacman_conf"
    elif [[ -z "$pacman_conf" ]]; then
        pacman_conf="/etc/pacman.conf"
    fi
    pacman_conf="$(realpath -- "$pacman_conf")"
    [[ ! -v override_pkg_list ]] || pkg_list+=("${override_pkg_list[@]}")
    if [[ -v override_iso_label ]]; then
        iso_label="$override_iso_label"
    elif [[ -z "$iso_label" ]]; then
        iso_label="${app_name^^}"
    fi
    if [[ -v override_iso_publisher ]]; then
        iso_publisher="$override_iso_publisher"
    elif [[ -z "$iso_publisher" ]]; then
        iso_publisher="${app_name}"
    fi
    if [[ -v override_iso_application ]]; then
        iso_application="$override_iso_application"
    elif [[ -z "$iso_application" ]]; then
        iso_application="${app_name} iso"
    fi
    if [[ -v override_install_dir ]]; then
        install_dir="$override_install_dir"
    elif [[ -z "$install_dir" ]]; then
        install_dir="${app_name}"
    fi
    [[ ! -v override_gpg_key ]] || gpg_key="$override_gpg_key"
    if [[ -v override_quiet ]]; then
        quiet="$override_quiet"
    elif [[ -z "$quiet" ]]; then
        quiet="y"
    fi

    # Set variables that do not have overrides
    [[ -n "$arch" ]] || arch="$(uname -m)"
    [[ -n "$airootfs_image_type" ]] || airootfs_image_type="squashfs"
    [[ -n "$iso_name" ]] || iso_name="${app_name}"
    [[ -n "$img_name" ]] || img_name="${iso_name}-${iso_version}-${arch}.iso"
}

_export_gpg_publickey() {
    gpg --batch --output "${work_dir}/pubkey.gpg" --export "${gpg_key}"
}

_make_version() {
    install -d -m 0755 -- "${isofs_dir}/${install_dir}"
    _msg_info "Creating files with iso version..."
    printf '%s\n' "${iso_version}" > "${airootfs_dir}/version"
    printf '%s\n' "${iso_version}" > "${isofs_dir}/${install_dir}/version"
    printf '%.1024s' "$(printf '# GRUB Environment Block\nVERSION=%s\n%s' "${iso_version}" \
        "$(printf '%0.1s' "#"{1..1024})")" > "${isofs_dir}/${install_dir}/grubenv"
    _msg_info "Done!"
}

_make_pkglist() {
    install -d -m 0755 -- "${isofs_dir}/${install_dir}"
    _msg_info "Creating a list of installed packages on live-enviroment..."
    pacman -Q --sysroot "${airootfs_dir}" > "${isofs_dir}/${install_dir}/pkglist.${arch}.txt"
    _msg_info "Done!"
}

_build_profile() {
    # Set up essential directory paths
    airootfs_dir="${work_dir}/${arch}/airootfs"
    isofs_dir="${work_dir}/iso"
    # Create working directory
    [[ -d "${work_dir}" ]] || install -d -- "${work_dir}"
    # Write build date to file or if the file exists, read it from there
    if [[ -e "${work_dir}/build_date" ]]; then
        SOURCE_DATE_EPOCH="$(<"${work_dir}/build_date")"
    else
        printf '%s\n' "$SOURCE_DATE_EPOCH" > "${work_dir}/build_date"
    fi

    [[ "${quiet}" == "y" ]] || _show_config
    _run_once _make_pacman_conf
    [[ -z "${gpg_key}" ]] || _run_once _export_gpg_publickey
    _run_once _make_custom_airootfs
    _run_once _make_packages
    _run_once _make_version
    _run_once _make_customize_airootfs
    _run_once _make_pkglist
    _make_bootmodes
    _run_once _cleanup_airootfs
    _run_once _prepare_airootfs_image
    _run_once _build_iso
}

while getopts 'p:C:L:P:A:D:w:o:g:vh?' arg; do
    case "${arg}" in
        p) read -r -a override_pkg_list <<< "${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="${OPTARG}" ;;
        w) override_work_dir="${OPTARG}" ;;
        o) override_out_dir="${OPTARG}" ;;
        g) override_gpg_key="${OPTARG}" ;;
        v) override_quiet="n" ;;
        h|?) _usage 0 ;;
        *)
            _msg_error "Invalid argument '${arg}'" 0
            _usage 1
            ;;
    esac
done

shift $((OPTIND - 1))

if (( $# < 1 )); then
    _msg_error "No profile specified" 0
    _usage 1
fi

if (( EUID != 0 )); then
    _msg_error "${app_name} must be run as root." 1
fi

# get the absolute path representation of the first non-option argument
profile="$(realpath -- "${1}")"

_read_profile
_set_overrides
_validate_options
_build_profile

# vim:ts=4:sw=4:et: