Add license and basic documentation

LICENSE:
Add GPL-3.0 license.

{{archiso,configs}/*,.editorconfig,.gitlab-ci.yml}:
Add SPDX license identifier.

Makefile:
Add SPDX license identifier.
Install the `run_archiso.sh` script as global executable `run_archiso`.
Use -D and -t flags to install to install files more generically (without a previous call to install the directory).

README.rst:
Add README outlining the project's scope, how to build images from the profiles and how to test.

AUTHORS.rst:
Add list of all direct contributors to the repository.

CONTRIBUTING.rst:
Add basic contribution guidelines, explaining the linter and the license in use.

Closes #7
Closes #3

.editorconfig

-# EditorConfig configuration for archiso
-# http://EditorConfig.org
+# EditorConfig for archiso
+# https://editorconfig.org/
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 # Top-most EditorConfig file
 root = true
@@ -22,3 +24,11 @@ trim_trailing_whitespace = true
 charset = utf-8
 indent_style = space
 indent_size = 2
+
+[*.rst]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+indent_style = space
+indent_size = 2

.gitlab-ci.yml

 ---
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 default:
   image: archlinux/base

AUTHORS.rst

+===============
+Archiso Authors
+===============
+
+* Aaron Griffin <aaron@archlinux.org>
+* Adam Purkrt <adam@purkrt.net>
+* Chandan Singh <cks071g2@gmail.com>
+* Charles Vejnar <ce@vejnar.org>
+* Christian Hesse <mail@eworm.de>
+* Christopher Brannon <cmbrannon79@gmail.com>
+* Dan McGee <dan@archlinux.org>
+* David Runge <dvzrv@archlinux.org>
+* David Thurstenson <thurstylark@gmail.com>
+* Dieter Plaetinck <dieter@plaetinck.be>
+* Eli Schwartz <eschwartz@archlinux.org>
+* Florian Pritz <bluewind@xinu.at>
+* Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>
+* Gerhard Brauer <gerbra@archlinux.de>
+* James Sitegen <jamesm.sitegen@gmail.com>
+* Justin Kromlinger <hashworks@archlinux.org>
+* Keshav Amburay <the.ridikulus.rat@gmail.com>
+* Loui Chang <louipc.ist@gmail.com>
+* Lukas Fleischer <archlinux@cryptocrack.de>
+* Martin Damian Fernandez <martin.damian.fernandez@gmail.com>
+* Pierre Schmitz <pierre@archlinux.de>
+* Sean Enck <enckse@voidedtech.com>
+* Simo Leone <simo@archlinux.org>
+* Steffen Bönigk <boenki@gmx.de>
+* Sven-Hendrik Haase <sh@lutzhaase.com>
+* Thomas Bächler <thomas@archlinux.org>
+* Yu Li-Yu <afg984@gmail.com>
+* nl6720 <nl6720@gmail.com>
+* Øyvind Heggstad <heggstad@gmail.com>

CONTRIBUTING.rst

+============
+Contributing
+============
+
+These are the contribution guidelines for archiso.
+All contributions fall under the terms of the GPL-3.0-or-later (see `LICENSE <LICENSE>`_).
+
+Editorconfig
+============
+
+A top-level editorconfig file is provided. Please configure your text editor to use it.
+
+Linting
+=======
+
+All ash and bash scripts are linted using shellcheck:
+
+  .. code:: bash
+
+    make check
+
+Testing
+=======
+
+Contributors are expected to test their contributions by building the releng profile and running the resulting image
+using `run_archiso <scripts/run_archiso.sh>`_.

LICENSE

+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
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+<https://www.gnu.org/licenses/>.
+
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+may consider it more useful to permit linking proprietary applications with
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+<https://www.gnu.org/licenses/why-not-lgpl.html>.

Makefile

+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 INSTALL_FILES=$(wildcard archiso/initcpio/install/*)
 HOOKS_FILES=$(wildcard archiso/initcpio/hooks/*)
 SCRIPT_FILES=$(wildcard archiso/initcpio/script/*)
@@ -6,7 +9,7 @@ INSTALL_DIR=$(DESTDIR)/usr/lib/initcpio/install
 HOOKS_DIR=$(DESTDIR)/usr/lib/initcpio/hooks
 SCRIPT_DIR=$(DESTDIR)/usr/lib/initcpio
 
-DOC_FILES=$(wildcard docs/*)
+DOC_FILES=$(wildcard docs/*) $(wildcard *.rst)
 
 DOC_DIR=$(DESTDIR)/usr/share/doc/archiso
 
@@ -25,7 +28,8 @@ check:
 install: install-program install-initcpio install-examples install-doc
 
 install-program:
-	install -D -m 755 archiso/mkarchiso $(DESTDIR)/usr/bin/mkarchiso
+	install -vDm 755 archiso/mkarchiso -t "$(DESTDIR)/usr/bin/"
+	install -vDm 755 scripts/run_archiso.sh "$(DESTDIR)/usr/bin/run_archiso"
 
 install-initcpio:
 	install -d $(SCRIPT_DIR) $(HOOKS_DIR) $(INSTALL_DIR)
@@ -38,7 +42,6 @@ install-examples:
 	cp -a --no-preserve=ownership configs $(DESTDIR)/usr/share/archiso/
 
 install-doc:
-	install -d $(DOC_DIR)
-	install -m 644 -t $(DOC_DIR) $(DOC_FILES)
+	install -vDm 644 $(DOC_FILES) -t $(DOC_DIR)
 
 .PHONY: check install install-program install-initcpio install-examples install-doc

README.rst

+=======
+archiso
+=======
+
+The archiso project features scripts and configuration templates to build installation media (*.iso* images) for BIOS
+and UEFI based systems on the x86_64 architecture.
+Currently creating the images is only supported on Arch Linux.
+
+Requirements
+============
+
+The following packages need to be installed to be able to create an image with the included scripts:
+
+* arch-install-scripts
+* dosfstools
+* e2fsprogs
+* edk2-shell
+* libisoburn
+* squashfs-tools
+
+For running the images in a virtualized test environment the following packages are required:
+
+* edk2-ovmf
+* qemu
+
+For linting the shell scripts the following package is required:
+
+* shellcheck
+
+Profiles
+========
+
+Archiso comes with two profiles: **baseline** and **releng**. While both can serve as starting points for creating
+custom live media, **releng** is used to create the monthly installation medium.
+They can be found below `configs/baseline/ <configs/baseline/>`_  and `configs/releng/ <configs/releng/>`_
+(respectively). Both profiles are defined by files to be placed into overlays (e.g. *airootfs* -> *the image's /*) and
+dynamic actions (i.e. *build.sh* scripts).
+
+Create images
+=============
+
+Usually the archiso tools are installed as a package. However, it is also possible to clone this repository and create
+images without installing archiso system-wide.
+
+As filesystems are created and various mount actions have to be done when creating an image, **root** is required to run
+the scripts.
+
+When archiso is installed system-wide and the modification of a profile is desired, it is necessary to copy it to a
+writeable location, as */usr/share/archiso* is tracked by the package manager and only writeable by root (changes will
+be lost on update).
+
+The examples below will assume an unmodified profile in a system location (unless noted otherwise).
+
+It is advised to check the help information of the **build.sh** scripts in the profiles:
+
+  .. code:: bash
+
+    /usr/share/archiso/configs/releng/build.sh --help
+
+Create images with packaged archiso
+-----------------------------------
+
+  .. code:: bash
+
+    /usr/share/archiso/configs/releng/build.sh -w path/to/work_dir -o path/to/out_dir
+
+Create images with local clone
+------------------------------
+
+Clone this repository and make sure to run with the local `mkarchiso <archiso/mkarchiso>`_  script in *PATH* (if it has
+been modified):
+
+  .. code:: bash
+
+    PATH="archiso:$PATH" ./configs/releng/build.sh -w path/to/work_dir -o path/to/out_dir
+
+Testing
+=======
+
+The convenience script **run_archiso** is provided to boot into the medium using qemu.
+It is advised to read its help information:
+
+  .. code:: bash
+
+    run_archiso -h
+
+Run the following to boot the iso using BIOS:
+
+  .. code:: bash
+
+    run_archiso -i path/to/an/arch.iso
+
+Run the following to boot the iso using UEFI:
+
+  .. code:: bash
+
+    run_archiso -i path/to/an/arch.iso -u
+
+The script can of course also be executed from this repository:
+
+
+  .. code:: bash
+
+    ./scripts/run_archiso.sh -i path/to/an/arch.iso
+
+Installation
+============
+
+To install archiso system-wide use the included **Makefile**:
+
+  .. code:: bash
+
+    make install
+
+License
+=======
+
+Archiso is licensed under the terms of the **GPL-3.0-or-later** (see `LICENSE <LICENSE>`_).

archiso/initcpio/hooks/archiso

 #!/bin/ash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 # args: source, newroot, mountpoint
 _mnt_dmsnapshot() {

archiso/initcpio/hooks/archiso_loop_mnt

 #!/bin/ash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 run_hook () {
     # shellcheck disable=SC2154

archiso/initcpio/hooks/archiso_pxe_common

 #!/bin/ash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 run_hook () {
     # Do *not* declare 'bootif_dev' local! We need it in run_latehook().

archiso/initcpio/hooks/archiso_pxe_http

 #!/bin/ash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 run_hook() {
     # shellcheck disable=SC2154

archiso/initcpio/hooks/archiso_pxe_nbd

 #!/bin/ash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 run_earlyhook() {
     # shellcheck disable=SC2154

archiso/initcpio/hooks/archiso_pxe_nfs

 #!/bin/ash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 run_hook() {
     # shellcheck disable=SC2154

archiso/initcpio/hooks/archiso_shutdown

 #!/bin/ash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 run_cleanuphook() {
     rm -rf /usr/lib/modules

archiso/initcpio/install/archiso

 #!/usr/bin/env bash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 build() {
     add_module "cdrom"

archiso/initcpio/install/archiso_kms

 #!/usr/bin/env bash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 build() {
     add_module "amdgpu"

archiso/initcpio/install/archiso_loop_mnt

 #!/usr/bin/env bash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 build() {
     add_runscript

archiso/initcpio/install/archiso_pxe_common

 #!/usr/bin/env bash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 build() {
     add_checked_modules -f "(irda|phy|wimax|wireless|ppp_|plip|pppoe)" "/drivers/net/"

archiso/initcpio/install/archiso_pxe_http

 #!/usr/bin/env bash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 build() {
     add_runscript

archiso/initcpio/install/archiso_pxe_nbd

 #!/usr/bin/env bash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 build() {
     add_module "nbd"