From faab7937ce1333dc3381b2599f2dfaaf948b03e1 Mon Sep 17 00:00:00 2001
From: Grigori Fursin <Grigori.Fursin@cTuning.org>
Date: Fri, 13 Sep 2019 11:33:34 +0200
Subject: [PATCH] added CK kernel functions save_state(), restore_state, reinit
 to let multiple CK instances co-exist

---
 CHANGES.txt  |  2 ++
 ck/kernel.py | 93 +++++++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 91 insertions(+), 4 deletions(-)

diff --git a/CHANGES.txt b/CHANGES.txt
index 26ef5b6a82..b9edd1dde4 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -18,6 +18,8 @@
     "index_modules":[list of module UIDs and aliases]
   * removed AUTHORS.txt as non-standard (leaving CONTRIBUTIONS.txt)
   * added possibility to skip SSL certificate check for remote repositories
+  * added CK kernel functions save_state(), restore_state, reinit
+    to let multiple CK instances co-exist
 
 * V1.10.3
   * fixed major bug with kernel version checking
diff --git a/ck/kernel.py b/ck/kernel.py
index 3a0787c2e0..af57270b86 100755
--- a/ck/kernel.py
+++ b/ck/kernel.py
@@ -348,6 +348,90 @@
 type_long=None        # In Python 3 -> int, in Python 2 -> long
 string_io=None        # StringIO, which is imported differently in Python 2 and 3
 
+##############################################################################
+# Save CK state
+#
+# TARGET: end users
+
+def save_state():
+    """
+    Input:  None
+
+    Output: dict with state
+    """
+
+    import copy
+    import os
+
+    r={}
+
+    r['cfg']=copy.deepcopy(cfg)
+    r['paths_repos']=copy.deepcopy(paths_repos)
+
+    r['cache_repo_init']=cache_repo_init
+    r['paths_repos_all']=copy.deepcopy(paths_repos_all)
+    r['cache_repo_uoa']=copy.deepcopy(cache_repo_uoa)
+    r['cache_repo_info']=copy.deepcopy(cache_repo_info)
+
+    r['os.environ']=copy.deepcopy(os.environ)
+
+    return r
+
+##############################################################################
+# Restore CK state
+#
+# TARGET: end users
+
+def restore_state(r):
+    """
+    Input:  dict with state
+
+    Output: output from "init" function
+    """
+
+    global initialized, cfg, paths_repos, cache_repo_init, paths_repos_all, cache_repo_uoa, cache_repo_info
+
+    import copy
+    import os
+
+    cfg=r['cfg']
+    paths_repos=r['paths_repos']
+    
+    cache_repo_init=r['cache_repo_init']
+    paths_repos_all=r['paths_repos_all']
+    cache_repo_uoa=r['cache_repo_uoa']
+    cache_repo_info=r['cache_repo_info']
+
+    os.environ=r['os.environ']
+
+    initialized=False
+
+    return init({})
+
+##############################################################################
+# Reinitialize CK
+#
+# TARGET: end users
+
+def reinit():
+    """
+    Input:  None
+
+    Output: output from "init" function
+    """
+
+    global initialized, paths_repos, cache_repo_init, paths_repos_all, cache_repo_uoa, cache_repo_info
+
+    initialized=False
+    paths_repos=[]
+
+    cache_repo_init=False
+    paths_repos_all=[]
+    cache_repo_uoa={}
+    cache_repo_info={}
+
+    return init({})
+
 ##############################################################################
 # Universal print of unicode string in utf8 that supports Python 2.x and 3.x
 #
@@ -5529,12 +5613,13 @@ def short_help(i):
 
     h+='\nPython version used by CK: '+r['version'].replace('\n','\n   ')+'\n'
 
-    h+='\nPath to the default repo: '+work['dir_default_repo_path']+'\n'
-    h+=  'Path to CK repositories: '+work['dir_repos']+'\n'
+    h+='\nPath to the default repo: '+work['dir_default_repo']+'\n'
+    h+=  'Path to the local repo:   '+work['dir_local_repo']+'\n'
+    h+=  'Path to CK repositories:  '+work['dir_repos']+'\n'
 
-    h+='\n'+cfg['help_web'].replace('\n','').strip().replace('   ','')+'\n'
+    h+='\n'+cfg['help_web'].replace('\n','').strip()+'\n' #.replace('   ','')+'\n'
 
-    h+='CK Google group: https://bit.ly/ck-google-group\n'
+    h+='CK Google group:  https://bit.ly/ck-google-group\n'
     h+='CK Slack channel: https://bit.ly/ck-slack'
 
     if o=='con':