Determine the SW_VERSION at run time

Distro layer package 'python-keyring' has a dependency on flock layer
package 'tsconfig'. This is s violation of the layering policy,
preventing successful layerd builds.

Get the SW_VERSION via parsing the /etc/build.info file instead of the
tsconfig.tsconfig python module at run time. We do this so that
python-keyring no longer has a runtime dependency on tsconfig.

Test Plan:

Pass: build python-keyring

Pass: put the codes in a test.py. get the SW_VERSION variable by run the
      test.py in an environment in which build-info is installed.

Pass: trigger exception if removing /etc/build.info, or no SW_VERSION
      in the file.

Closes-Bug: https://bugs.launchpad.net/starlingx/+bug/1968611

Signed-off-by: Yue Tao <yue.tao@windriver.com>
Change-Id: I7f0c4eaae7aacf5bcbef082817dc99a62600a162

security/python-keyring/debian/deb_patches/debian-depend-tsconfig.patch

@@ -1,13 +0,0 @@
-The source patch keyring_path_change.patch import
-tsconfig, so add tsconfig to Depends
-
---- a/debian/control
-+++ b/debian/control
-@@ -20,6 +20,7 @@ Package: python3-keyring
- Architecture: all
- Depends: python3-jeepney (>= 0.4.2),
-          python3-secretstorage (>= 3.2),
-+         tsconfig
-          ${misc:Depends},
-          ${python3:Depends}
- Suggests: gnome-keyring, libkf5wallet-bin, python3-dbus, python3-keyrings.alt

security/python-keyring/debian/deb_patches/series

@@ -1 +0,0 @@
-debian-depend-tsconfig.patch

security/python-keyring/debian/patches/0001-Determine-the-SW_VERSION-at-run-time.patch

@@ -0,0 +1,46 @@
+From 6cceddb03a3cad7a09a70d0c2fdc901d9758c025 Mon Sep 17 00:00:00 2001
+From: Yue Tao <Yue.Tao@windriver.com>
+Date: Wed, 20 Apr 2022 14:29:27 +0800
+Subject: [PATCH] Determine the SW_VERSION at run time
+
+Get the SW_VERSION via parsing the /etc/build.info file instead of
+tsconfig.tsconfig module at run time to break python-keyring run depends
+on tsconfig.
+
+Signed-off-by: Yue Tao <Yue.Tao@windriver.com>
+---
+ keyring/util/platform_.py | 18 +++++++++++++++++-
+ 1 file changed, 17 insertions(+), 1 deletion(-)
+
+diff --git a/keyring/util/platform_.py b/keyring/util/platform_.py
+index bb4d297..5eebd70 100644
+--- a/keyring/util/platform_.py
++++ b/keyring/util/platform_.py
+@@ -21,7 +21,23 @@ def _data_root_Linux():
+     Use freedesktop.org Base Dir Specfication to determine storage
+     location.
+     """
+-    fallback = os.path.expanduser('/opt/platform/.keyring/')
++    build_info = "/etc/build.info"
++    try:
++        with open(build_info, 'r') as binfo:
++            lines = list(line for line in (p.strip() for p in binfo) if line)
++    except Exception as e:
++        print(e, file=sys.stderr)
++        raise IOError
++
++    sw_version = None
++    for entry in lines:
++        if entry.startswith('SW_VERSION='):
++            sw_version = entry.split("=")[1].strip('"')
++            break
++    if sw_version == None:
++        raise ValueError(f"No SW_VERSION found in {build_info}")
++    keyring_dir = os.path.join('/opt/platform/.keyring', sw_version)
++    fallback = os.path.expanduser(keyring_dir)
+     root = os.environ.get('XDG_DATA_HOME', None) or fallback
+     return os.path.join(root, 'python_keyring')
+ 
+-- 
+2.25.1
+

security/python-keyring/debian/patches/keyring_path_change.patch

@@ -1,23 +0,0 @@
----
- keyring/util/platform_.py |    4 +++-
- 1 file changed, 3 insertions(+), 1 deletion(-)
-
---- a/keyring/util/platform_.py
-+++ b/keyring/util/platform_.py
-@@ -1,5 +1,6 @@
- import os
- import platform
-+from tsconfig.tsconfig import SW_VERSION
- 
- 
- def _settings_root_XP():
-@@ -21,7 +22,8 @@ def _data_root_Linux():
-     Use freedesktop.org Base Dir Specfication to determine storage
-     location.
-     """
--    fallback = os.path.expanduser('/opt/platform/.keyring/')
-+    keyring_dir = os.path.join('/opt/platform/.keyring', SW_VERSION)
-+    fallback = os.path.expanduser(keyring_dir)
-     root = os.environ.get('XDG_DATA_HOME', None) or fallback
-     return os.path.join(root, 'python_keyring')
- 

security/python-keyring/debian/patches/series

@@ -1,2 +1,2 @@
 no_keyring_password.patch
-keyring_path_change.patch
+0001-Determine-the-SW_VERSION-at-run-time.patch