Coding style.

- Changed test-distributions to a python script so the build
  functions can be used in a python AppImage build script.

test_distributions.py

@@ -0,0 +1,159 @@
+#!/usr/bin/python3
+
+# Copyright (C) 2017 Andrew Hamilton. All rights reserved.
+# Licensed under the Artistic License 2.0.
+
+
+import os
+import subprocess
+import sys
+import tempfile
+
+
+VIGIL_PATH = os.path.realpath(os.path.dirname(__file__))
+
+
+def cmd(command):
+    subprocess.check_call(command, shell=True)
+
+
+def mount_squashfs_iso(iso, squashfs_path, mount_point):
+    cmd("mkdir iso && sudo mount -o loop %s iso" % iso)
+    cmd("mkdir lower && sudo mount -t squashfs iso/%s lower" % squashfs_path)
+    cmd("mkdir upper work %s && sudo mount -t overlay "
+	"-o lowerdir=lower,upperdir=upper,workdir=work overlay %s" %
+        (mount_point, mount_point))
+
+
+def umount_squashfs_iso(mount_point):
+    cmd("sudo umount %s && sudo rm -rf upper work %s" %
+        (mount_point, mount_point))
+    cmd("sudo umount lower && rmdir lower")
+    cmd("sudo umount iso && rmdir iso")
+
+
+def run_in_container(container, command):
+    option = "--directory" if os.path.isdir(container) else "--image"
+    cmd("sudo systemd-nspawn --quiet --chdir=/vigil --overlay=%s:/vigil "
+	'%s=%s /bin/bash --login -c "%s"' %
+        (VIGIL_PATH, option, container, command))
+
+
+def build_ubuntu():
+    cmd("sudo debootstrap --components=main,restricted,universe,multiverse "
+        "zesty ubuntu.part")
+    run_in_container("ubuntu.part",
+	             "ln -sf /lib/systemd/resolv.conf /etc/resolv.conf")
+    run_in_container("ubuntu.part", "apt-get update")
+    run_in_container("ubuntu.part", "apt-get install --yes python3-pip")
+    os.rename("ubuntu.part", "ubuntu")
+
+
+def build_fedora():
+    image = "Fedora-Cloud-Base-25-1.3.x86_64.raw"
+    cmd("wget --continue https://dl.fedoraproject.org/pub/fedora/linux/"
+        "releases/25/CloudImages/x86_64/images/%s.xz" % image)
+    cmd("unxz %s.xz" % image)
+    os.rename(image, "fedora")
+
+
+def build_debian():
+    cmd("sudo debootstrap --components=main,contrib,non-free "
+	"--include=sudo jessie debian.part")
+    run_in_container("debian.part", "apt-get update")
+    os.rename("debian.part", "debian")
+
+
+ARCHLINUX_ISO = "archlinux-2017.06.01-x86_64.iso"
+
+
+def build_archlinux():
+    cmd("wget --continue http://mirrors.kernel.org/archlinux/iso/2017.06.01/"
+        + ARCHLINUX_ISO)
+    mount_squashfs_iso(ARCHLINUX_ISO, "arch/x86_64/airootfs.sfs", "archlinux")
+    run_in_container("archlinux", "pacman-key --init")
+    run_in_container("archlinux", "pacman-key --populate archlinux")
+    run_in_container("archlinux", "pacman -Syyu --noconfirm")
+
+
+def remove_archlinux():
+    umount_squashfs_iso("archlinux")
+    os.remove(ARCHLINUX_ISO)
+
+
+OPENSUSE_ISO="openSUSE-Tumbleweed-GNOME-Live-x86_64-Current.iso"
+
+
+def build_opensuse():
+    cmd("wget --continue https://download.opensuse.org/tumbleweed/iso/"
+        + OPENSUSE_ISO)
+    mount_squashfs_iso(OPENSUSE_ISO, "openSUSE-tumbleweed-livecd-gnome"
+                       "-read-only.x86_64-2.8.0", "opensuse")
+
+
+def remove_opensuse():
+    umount_squashfs_iso("opensuse")
+    os.remove(OPENSUSE_ISO)
+
+
+PIXEL_ISO = "2016-12-13-pixel-x86-jessie.iso"
+
+
+def build_pixel():
+    cmd("wget --continue http://downloads.raspberrypi.org/pixel_x86/images/"
+        "pixel_x86-2016-12-13/" + PIXEL_ISO)
+    mount_squashfs_iso(PIXEL_ISO, "live/filesystem.squashfs", "pixel")
+    cmd("sudo rm pixel/etc/resolv.conf")
+    cmd("echo 'nameserver 127.0.0.53' | sudo dd of=pixel/etc/resolv.conf")
+    run_in_container("pixel", "apt-get update")
+
+
+def remove_pixel():
+    umount_squashfs_iso("pixel")
+    os.remove(PIXEL_ISO)
+
+
+def build_gentoo():
+    tar_file = "stage3-amd64-20170525.tar.bz2"
+    cmd("wget --continue http://distfiles.gentoo.org/releases/amd64/"
+        "autobuilds/20170525/" + tar_file)
+    cmd("mkdir -p gentoo.part")
+    cmd("sudo tar --directory=gentoo.part -xjf " + tar_file)
+    os.remove(tar_file)
+    run_in_container("gentoo.part", "emerge --sync")
+    run_in_container("gentoo.part", "emerge sudo")
+    os.rename("gentoo.part", "gentoo")
+
+
+def main():
+    WORK_PATH = (tempfile.mkdtemp(prefix="vigil-") if len(sys.argv) == 1
+                 else sys.argv[1])
+    os.chdir(WORK_PATH)
+    cmd("sudo apt-get install -y systemd-container debootstrap xz-utils wget")
+    # FIX: Reenable: fedora debian archlinux opensuse pixel gentoo
+    for distribution in ["ubuntu"]:
+        if os.path.exists(distribution):
+            print("%s container already exists." % distribution)
+        else:
+            print("Building %s container..." % distribution)
+            globals()["build_" + distribution]()
+        print("Installing vigil's dependencies in %s..." % distribution)
+        run_in_container(distribution, "./install-dependencies")
+        print("Installing vigil in %s..." % distribution)
+        run_in_container(distribution, "pip3 install .")
+        print("Testing vigil in %s..." % distribution)
+        run_in_container(distribution, "./test-all")
+        print("Running vigil in %s..." % distribution)
+        run_in_container(distribution, "vigil --help")
+        print("Successfully installed vigil in %s." % distribution)
+        print("Removing %s container..." % distribution)
+        try:
+            globals()["remove_" + distribution]()
+        except KeyError:
+            cmd("sudo rm -rf " + distribution)
+    os.rmdir(WORK_PATH)
+    print("Finished.")
+
+
+if __name__ == "__main__":
+    main()