Add config file and force timestamp conditional option

rootfs.py

@@ -9,6 +9,7 @@ you can run bootstap inside chroot.
 # SPDX-License-Identifier: GPL-3.0-or-later
 # SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
 # SPDX-FileCopyrightText: 2021 Bastian Bittorf <bb@npl.de>
+# SPDX-FileCopyrightText: 2021 Melg Eight <public.melg8@gmail.com>
 
 import argparse
 import glob
@@ -33,6 +34,9 @@ def main():
     parser.add_argument("-p", "--preserve", help="Do not unmount temporary dir",
                         action="store_true")
     parser.add_argument("-t", "--tmpdir", help="Temporary directory")
+    parser.add_argument("--force_timestamps",
+                        help="Force all files timestamps to be 0 unix time",
+                        action="store_true")
 
     # QEMU arguments
     parser.add_argument("-q", "--qemu-cmd", help="QEMU command",
@@ -52,7 +56,8 @@ def main():
     if args.arch != "x86":
         raise ValueError("Only x86 is supported at the moment.")
 
-    system_a = SysA(arch=args.arch, preserve_tmp=args.preserve, tmpdir=args.tmpdir)
+    system_a = SysA(arch=args.arch, preserve_tmp=args.preserve, tmpdir=args.tmpdir,
+                    force_timestamps=args.force_timestamps)
     initramfs_path = os.path.join(system_a.tmp_dir, "initramfs")
 
     if not args.chroot:

sysa.py

@@ -18,7 +18,7 @@ class SysA:
     """
     Class responsible for preparing sources for System A.
     """
-    def __init__(self, arch, preserve_tmp, tmpdir):
+    def __init__(self, arch, preserve_tmp, tmpdir, force_timestamps):
         self.git_dir = os.path.dirname(os.path.join(__file__))
         self.arch = arch
         self.preserve_tmp = preserve_tmp
@@ -29,6 +29,7 @@ class SysA:
             self.tmp_dir = tmpdir
         self.sysa_dir = os.path.join(self.git_dir, 'sysa')
         self.after_dir = os.path.join(self.tmp_dir, 'after')
+        self.force_timestamps = force_timestamps
 
         self.prepare()
 
@@ -187,6 +188,7 @@ class SysA:
         """
 
         self.create_after_dirs()
+        self.create_configuration_file()
         self.mescc_tools_checksum()
         self.deploy_extra_files()
         self.mescc_tools_extra()
@@ -194,6 +196,15 @@ class SysA:
         self.tcc_0_9_26()
         self.get_packages()
 
+    def create_configuration_file(self):
+        """
+        Creates bootstrap.cfg file which would contain options used to
+        customize bootstrap.
+        """
+        config_path = os.path.join(self.after_dir, "bootstrap.cfg")
+        with open(config_path, "w") as config:
+            config.write("FORCE_TIMESTAMPS=" + str(self.force_timestamps))
+
     def create_after_dirs(self):
         """
         Create some empty directories for early bootstrap

sysa/helpers.sh

@@ -3,6 +3,7 @@
 # SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
 # SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
 # SPDX-FileCopyrightText: 2021 Paul Dersey <pdersey@gmail.com>
+# SPDX-FileCopyrightText: 2021 Melg Eight <public.melg8@gmail.com>
 #
 # SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -149,3 +150,11 @@ call() {
 default() {
     "default_${build_stage}"
 }
+
+# Set all files modified dates to be 0 unix time.
+# Should be called at the end of bootstrapping process.
+# This function needs `touch` that supports --no-dereference
+# (at least coreutils 8.1).
+canonicalise_all_files_timestamp() {
+    find / -exec touch --no-dereference -t 197001010000.00 {} +
+}

sysa/run2.sh

@@ -11,6 +11,8 @@ set -e
 
 . helpers.sh
 
+. bootstrap.cfg
+
 build xz-5.0.5
 
 build automake-1.11.2
@@ -31,6 +33,11 @@ build mpfr-4.1.0
 
 build mpc-1.2.1
 
+if [ "$FORCE_TIMESTAMPS" = True ] ; then
+    echo 'Forcing all files timestamps to be 0 unix time.'
+    canonicalise_all_files_timestamp
+fi
+
 echo "Bootstrapping completed."
 
 exec env - PATH=/after/bin PS1="\w # " bash -i