From e7f996c480b3be437794041077b297f3e9ddc1bb Mon Sep 17 00:00:00 2001
From: Hui Lan <lanhui@zjnu.edu.cn>
Date: Sat, 7 Dec 2019 09:58:54 +0800
Subject: create backup_files.py for backing up files

Define a function copy_and_backup_file(src_file, dest_dir) to do backup and compression work.

The function copy_and_backup_file is used in update_network_by_force.py.

-Hui
---
 Code/backup_files.py | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 Code/backup_files.py

(limited to 'Code/backup_files.py')

diff --git a/Code/backup_files.py b/Code/backup_files.py
new file mode 100644
index 0000000..39a0d30
--- /dev/null
+++ b/Code/backup_files.py
@@ -0,0 +1,54 @@
+# Usage: use the copy_and_backup_file() as a utility function for backing up a file.
+#
+# Purpose: the function copy_and_backup_file(src, dest_dir) copies file src to destination directory (if exists) and compress
+#          the copied file in the destination directory (to save space).
+#          
+#
+# Created on 7 December 2019 by Hui Lan (lanhui@zjnu.edu.cn)
+
+import os, sys
+from configure import UPDATE_NETWORK_LOG_FILE
+from datetime import datetime
+
+MINIMUM_SPACE_REQUIREMENT = 1 # Gigabytes
+
+def write_log_file(s, fname):
+    if not os.path.exists(fname):
+        return None
+    f = open(fname, 'a')
+    curr_time = datetime.now().strftime('%Y-%m-%d %H:%M')
+    s = '[' + curr_time + ']: ' + s
+    if not '\n' in s:
+        s += '\n'
+    f.write(s)
+    f.close()
+
+
+def make_paths(s):
+    if not os.path.isdir(s):
+        os.makedirs(s)
+
+
+def disk_has_enough_space():
+    available_G = 4 * os.statvfs('/home').f_bavail / (1024*1024) # compute available space (in Gigabytes).  Each block has 4k bytes, work for Linux/UNIX systems only
+    if available_G < MINIMUM_SPACE_REQUIREMENT:
+        print('[backup_files.py] home directory does not have enough space (only %4.1f G is available) ' % (available_G))
+        write_log_file('[backup_files.py] WARNING: home directory does not have enough space (only %4.1f G is available)!  No backup is carried out.' % (available_G), UPDATE_NETWORK_LOG_FILE)        
+        sys.exit()
+
+
+def copy_and_backup_file(src_file, dest_dir):
+    disk_has_enough_space() # make sure we have enough space firs.t
+    if not os.path.exists(src_file):
+        sys.exit()
+    make_paths(dest_dir) # if dest_dir does not exist, create it.
+    curr_date = datetime.now().strftime('%Y%m%d')
+    dest_file = os.path.join(dest_dir, os.path.basename(src_file) + '.' + curr_date)
+    cmd = 'cp %s %s && cd %s && gzip -f %s' % (src_file, dest_file, dest_dir, dest_file)
+    os.system(cmd)
+    write_log_file('[backup_files.py] File %s has been backed up to %s and zipped (.gz)' % (src_file, dest_file), UPDATE_NETWORK_LOG_FILE)            
+
+
+## main
+if __name__ == '__main__':
+    copy_and_backup_file('../Data/temp/edges.txt', '../Analysis')
-- 
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