lorax: Add --rootfs-size (#1368743)

This controls how big the root filesystem is for the squashfs used in
the boot.iso, the default is 2GiB.

Note that larger rootfs sizes will require more memory and may cause the
build to fail.

src/pylorax/cmdline.py

@@ -105,6 +105,8 @@ def lorax_parser():
                           metavar="[repo]", help="Names of repos to enable")
     optional.add_argument("--disablerepo", action="append", default=[], dest="disablerepos",
                           metavar="[repo]", help="Names of repos to disable")
+    optional.add_argument("--rootfs-size", type=int, default=2,
+                          help="Size of root filesystem in GiB. Defaults to 2.")
 
     # add the show version option
     parser.add_argument("-V", help="show program's version number and exit",

src/sbin/lorax

@@ -125,6 +125,7 @@ def main():
               workdir=tempdir, outputdir=opts.outputdir, buildarch=opts.buildarch,
               volid=opts.volid, domacboot=opts.domacboot, doupgrade=opts.doupgrade,
               installpkgs=opts.installpkgs,
+              size=opts.rootfs_size,
               add_templates=opts.add_templates,
               add_template_vars=parsed_add_template_vars,
               add_arch_templates=opts.add_arch_templates,