mkdeb.sh.in: pass remaining arguments to ./configure

Currently, mkdeb.sh (which is used to make a .deb package) runs
./configure with hardcoded options (some of which are automatically
detected based on configure-time variables).  To work around the
hardcoding, contrib/fj-mkdeb.py is used to add additional options by
rewriting the actual call to ./configure on mkdeb.sh.  For example, the
following invocation adds --disable-firetunnel to mkdeb.sh:

    $ ./configure && ./contrib/fj-mkdeb.py --disable-firetunnel

To avoid depending on another script and to avoid re-generating
mkdeb.sh, just let the latter pass the remaining arguments (the first
one is an optional package filename suffix) to ./configure directly.
Example:

    $ make distclean && ./configure && make dist &&
      ./mkdeb.sh "" --disable-firetunnel

Additionally, change contrib/fj-mkdeb.py to do roughly the same as the
above example, by simply forwarding the arguments that it receives to
./mkdeb.sh (which then forwards them to ./configure).  Also, remove the
--only-fix-mkdeb option, since the script does not change mkdeb.sh
anymore.  With these changes, the script's usage (other than when using
--only-fix-mkdeb) should remain the same.

Note: To clean the generated files and then make a .deb package using
the default configuration, the invocation is still the same:

    $ make distclean && ./configure && make deb

Note2: Running ./configure in the above examples is only needed for
generating Makefile/mkdeb.sh from Makefile.in/mkdeb.sh.in after running
distclean, so that running `make` / `./mkdeb.sh` afterwards works.

Should fully fix #772.

Relates to #1205 #3414 #5148.

4 files changed, 18 insertions, 38 deletions

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4871ef031..af590e2e1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -54,7 +54,7 @@ build_apparmor:
     script:
         - apt-get update -qq
         - DEBIAN_FRONTEND=noninteractive apt-get install -y -qq build-essential lintian libapparmor-dev pkg-config gawk
-        - ./configure --prefix=/usr --enable-apparmor && make deb-apparmor && dpkg -i firejail*.deb
+        - ./configure && make deb-apparmor && dpkg -i firejail*.deb
         - command -V firejail && firejail --version
         - firejail --version | grep -F 'AppArmor support is enabled'
 
diff --git a/Makefile.in b/Makefile.in
index 0e80fb43a..7d961213a 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -222,7 +222,7 @@ deb: dist
         ./mkdeb.sh
 
 deb-apparmor: dist
-        ./mkdeb.sh -apparmor
+        ./mkdeb.sh -apparmor --enable-apparmor
 
 test-compile: dist
         cd test/compile; ./compile.sh $(NAME)-$(VERSION)
diff --git a/contrib/fj-mkdeb.py b/contrib/fj-mkdeb.py
index 75fb6cbc8..f6611bee8 100755
--- a/contrib/fj-mkdeb.py
+++ b/contrib/fj-mkdeb.py
@@ -3,9 +3,10 @@
 # Copyright (C) 2014-2022 Firejail Authors
 # License GPL v2
 
-# This script automates the workaround for https://github.com/netblue30/firejail/issues/772
+# This script automates the creation of a .deb package.  It was originally
+# created to work around https://github.com/netblue30/firejail/issues/772
 
-import os, shlex, subprocess, sys
+import os, subprocess, sys
 
 
 def run(srcdir, args):
@@ -15,41 +16,29 @@ def run(srcdir, args):
         print('Error: Not a firejail source tree?  Exiting.')
         return 1
 
-    dry_run = False
-    escaped_args = []
-    # We need to modify the list as we go.  So be sure to copy the list to be iterated!
+    # Ignore unsupported arguments.
     for a in args[:]:
         if a.startswith('--prefix'):
             # prefix should ALWAYS be /usr here.  Discard user-set values
             args.remove(a)
-        elif a == '--only-fix-mkdeb':
-            # for us, not configure
-            dry_run = True
-            args.remove(a)
-        else:
-            escaped_args.append(shlex.quote(a))
 
     # Remove generated files.
-    if not dry_run:
-        distclean = subprocess.call(['make', 'distclean'])
-        if distclean != 0:
-            return distclean
+    distclean = subprocess.call(['make', 'distclean'])
+    if distclean != 0:
+        return distclean
 
     # Run configure to generate mkdeb.sh.
     first_config = subprocess.call(['./configure', '--prefix=/usr'] + args)
     if first_config != 0:
         return first_config
 
-    # Fix up dynamically-generated mkdeb.sh to include custom configure options.
-    with open('mkdeb.sh', 'rb') as f:
-        sh = str(f.read(), 'utf_8')
-    with open('mkdeb.sh', 'wb') as f:
-        f.write(bytes(sh.replace('./configure $CONFIG_ARGS',
-                                 './configure $CONFIG_ARGS ' + (' '.join(escaped_args))), 'utf_8'))
-
-    if dry_run: return 0
+    # Create the dist file used by mkdeb.sh.
+    make_dist = subprocess.call(['make', 'dist'])
+    if make_dist != 0:
+        return make_dist
 
-    return subprocess.call(['make', 'deb'])
+    # Run mkdeb.sh with the custom configure options.
+    return subprocess.call(['./mkdeb.sh'] + args)
 
 
 if __name__ == '__main__':
@@ -57,13 +46,12 @@ if __name__ == '__main__':
         print('''Build a .deb of firejail with custom configure options
 
 usage:
-{script} [--fj-src=SRCDIR] [--only-fix-mkdeb] [CONFIGURE_OPTIONS [...]]
+{script} [--fj-src=SRCDIR] [CONFIGURE_OPTIONS [...]]
 
  --fj-src=SRCDIR: manually specify the location of firejail source tree
                   as SRCDIR.  If not specified, looks in the parent directory
                   of the directory where this script is located, and then the
                   current working directory, in that order.
- --only-fix-mkdeb: don't run configure or make after modifying mkdeb.sh
  CONFIGURE_OPTIONS: arguments for configure
 '''.format(script=sys.argv[0]))
         sys.exit(0)
diff --git a/mkdeb.sh.in b/mkdeb.sh.in
index a18ff8021..79f8d748c 100755
--- a/mkdeb.sh.in
+++ b/mkdeb.sh.in
@@ -9,17 +9,9 @@
 set -e
 NAME=@PACKAGE_NAME@
 VERSION=@PACKAGE_VERSION@
-HAVE_APPARMOR=@HAVE_APPARMOR@
-HAVE_SELINUX=@HAVE_SELINUX@
 EXTRA_VERSION=$1
 
-CONFIG_ARGS="--prefix=/usr"
-if [ -n "$HAVE_APPARMOR" ]; then
-    CONFIG_ARGS="$CONFIG_ARGS --enable-apparmor"
-fi
-if [ -n "$HAVE_SELINUX" ]; then
-    CONFIG_ARGS="$CONFIG_ARGS --enable-selinux"
-fi
+test "$#" -gt 0 && shift
 
 CODE_ARCHIVE="$NAME-$VERSION.tar.xz"
 CODE_DIR="$NAME-$VERSION"
@@ -36,7 +28,7 @@ echo "*****************************************"
 tar -xJvf "$CODE_ARCHIVE"
 #mkdir -p "$INSTALL_DIR"
 cd "$CODE_DIR"
-./configure $CONFIG_ARGS
+./configure --prefix=/usr "$@"
 make -j2
 mkdir debian
 DESTDIR=debian make install-strip