feat: New structure, added CLI, logging and setup

* Changed structure to a Object orientated approach.
* Add CLI with input for the settings file.
* Added logging via file.
* Added setup for publishing in pip.

update/download.py

@@ -0,0 +1,79 @@
+'''
+Gitea Auto Updater
+
+Copyright 2018, 2019 The Gitea-Auto-Update Authors
+All rights reserved.
+
+License: GNU General Public License
+'''
+import requests
+import os
+import logging
+from shutil import which    # from whichcraft import which
+
+
+class Download:
+
+    def __init__(self, tmpDir, githubVersion, githubVersionTag, gtSystem, gtFile):
+        if not self.isTool("xz"):
+            logging.error("missing dependency: xz")
+            quit()
+
+        self.tmpDir = tmpDir
+        self.githubVersion = githubVersion
+        self.githubVersionTag = githubVersionTag
+        self.gtSystem = gtSystem
+        self.gtFile = gtFile
+
+        self.downloadGiteaFiles()
+        self.checkAndExtract()
+
+    def isTool(name):
+        # Function to check if tool is available
+        ##Check whether `name` is on PATH and marked as executable.
+        return which(name) is not None
+
+    def download(self, url, fileName):
+        # Function to download a file
+        # open in binary mode
+        with open(fileName, "wb") as file:
+            # get request
+            response = requests.get(url)
+            # write to file
+            file.write(response.content)
+
+    def downloadGiteaFiles(self):
+        # Set download url
+        gtDownload = 'https://github.com/go-gitea/gitea/releases/download/' + self.githubVersionTag + '/gitea-' + self.githubVersion + '-' + self.gtSystem + '.xz'
+        logging.info('Gitea file: %s', gtDownload)
+        shaDownload = gtDownload + '.sha256'
+        logging.info('SHA file: %s', shaDownload)
+
+        # Download file
+        logging.info("downloading sha256 hashsum")
+        self.download(shaDownload, self.tmpDir + 'gitea.xz.sha256')
+        logging.info("downloading %s", self.githubVersionTag + 'gitea.xz')
+        self.tmpXz = self.tmpDir +'gitea-' + self.githubVersion + '-' + self.gtSystem + '.xz'
+        self.download(gtDownload, self.tmpXz)
+
+    def shaCheck(self):
+        return os.system("sha256sum -c gitea.xz.sha256 > /dev/null") == 0
+
+    def extractFile(self):
+        logging.info("sha ok, extracting file to location")
+        # extracting download file
+        cmd = "xz -d " + self.tmpXz
+        logging.info(cmd)
+        os.system(cmd)
+        #  moving temp file to gtfile location
+        cmd = 'mv ' + self.tmpDir + 'gitea-' + self.githubVersion + '-' + self.gtSystem + ' ' + self.gtFile
+        logging.info(cmd)
+        os.system(cmd)
+
+    def checkAndExtract(self):
+        os.chdir(self.tmpDir)
+        if self.shaCheck():
+            self.extractFile()
+        else:
+            logging.error("error: sha256sum failed")
+            quit()