Add initial drafts of the build scripts.

scripts/build-config

@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+
+import argparse
+import re
+import sys
+import os
+import getpass
+import platform
+import json
+
+import defaults
+
+# argparse converts hyphens to underscores,
+# so for lookups in the original options hash we have to
+# convert them back
+def field_to_option(s):
+    return re.sub(r'_', '-', s)
+
+def get_default_build_by():
+    return "{user}@{host}".format(user= getpass.getuser(), host=platform.node())
+
+
+options = {
+   'architecture': ('Image target architecture (amd64 or i586)', lambda: 'amd64', lambda x: x in ['amd64', 'i586']),
+   'build-by': ('Builder identifier (e.g. jrandomhacker@example.net)', get_default_build_by, None)
+}
+
+# Create the option parser
+parser = argparse.ArgumentParser()
+for k, v in options.items():
+    parser.add_argument('--' + k, type=str, help=v[0], default=v[1]())
+
+args = vars(parser.parse_args())
+
+# Validate options
+for k, v in args.items():
+    key = field_to_option(k)
+    func = options[key][2]
+    if func is not None:
+        if not func(v):
+            print("{v} is not a valid value for --{o} option".format(o=key, v=v))
+            sys.exit(1)
+
+# Save to file
+with open(defaults.BUILD_CONFIG, 'w') as f:
+    json.dump(args, f)

scripts/check-build-env

@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+
+import os
+import sys
+
+required_packages = [
+    'make',
+    'live-build',
+    'pbuilder',
+    'devscripts',
+    'python-pystache'
+]
+
+
+def is_installed(name):
+    result = os.system("dpkg-query -W --showformat='${{Status}}\n' {name} 2>&1 | grep 'install ok installed' >/dev/null".format(name=name))
+    return True if result == 0 else False
+
+
+missing_packages = []
+
+print("Checking if packages required for VyOS image build are installed")
+
+for p in required_packages:
+    if not is_installed(p):
+        missing_packages.append(p)
+
+if missing_packages:
+    print("Your system does not have some of the required packages installed.")
+    print("Please install the following packages:")
+    print(" ".join(missing_packages))
+    sys.exit(1)
+else:
+    print("All required packages are installed")
+    sys.exit(0)

scripts/check-config

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+#!/usr/bin/env python
+
+import sys
+import os
+
+import defaults
+
+
+print("Checking build configuration")
+
+if not os.path.exists(defaults.BUILD_CONFIG):
+    print("Build config does not exist")
+    print("Please run the ./configure script and try again")
+    sys.exit(1)

scripts/defaults.py

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+import os
+
+BUILD_DIR = 'build'
+BUILD_CONFIG = os.path.join(BUILD_DIR, 'build-config.json')

scripts/live-build-config

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+#!/usr/bin/env python
+
+import sys
+import os
+import json
+
+import pystache
+
+import defaults
+import util
+
+util.check_build_config()
+
+lb_config_tmpl = """
+lb config noauto \
+        --architectures {{architecture}} \
+        --bootappend-live "boot=live components hostname=vyos username=live" \
+        --bootloader syslinux \
+        --binary-images iso-hybrid \
+        --debian-installer false \
+        --distribution jessie \
+        --iso-application "VyOS" \
+        --iso-publisher "{{build_by}}" \
+        --iso-volume "VyOS" \
+        --debootstrap-options "--variant=minbase --exclude=isc-dhcp-client,isc-dhcp-common,ifupdown" \
+        "${@}"
+"""
+
+with open(defaults.BUILD_CONFIG, 'r') as f:
+     build_config = json.load(f)
+
+lb_config_command = pystache.render(lb_config_tmpl, build_config)
+
+print("Configuring live-build")
+os.chdir(defaults.BUILD_DIR)
+
+result = os.system(lb_config_command)
+if result > 0:
+    print("live-build config failed")
+    sys.exit(1)

scripts/util.py

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+import sys
+import os
+
+import defaults
+
+def check_build_config():
+    if not os.path.exists(defaults.BUILD_CONFIG):
+        print("Build config file ({file}) does not exist".format(file=defaults.BUILD_CONFIG))
+        print("If you are running this script by hand, you should better not. Run 'make iso' instead.")
+        sys.exit(1)