Added Debian to local installer

I couldn't write it in bash, so I had to go with Python.
Eventually I'll rewrite locinst.sh to be almost fully Python.

.gitignore

@@ -0,0 +1 @@
+__pycache__

scripts/locinst.py

@@ -0,0 +1,152 @@
+#!/usr/bin/env python3
+
+import json
+import urllib.request
+import subprocess
+import os
+import sys
+import re
+
+LOCINST_DIR=os.environ['HOME']+'/.locinst'
+LOCINST_DB=os.environ['HOME']+'/.config/locinst'
+LOCINST_TMP='/tmp/locinst'
+
+DEBIAN_MIRROR = 'http://debian.polytech-lille.fr/debian/'
+
+def globallyInstalled(name):
+    try:
+        a = subprocess.check_output(['apt-cache', 'policy', 'name']).decode('utf8').strip().lower()
+        return 'Installed: (none)' not in [b.strip() for b in a.decode('utf8').split('\n')]
+    except FileNotFoundError:
+        return False
+
+def locallyInstalled(name):
+    return False
+
+def debian_install(name):
+    def findPackage(name):
+        raw = urllib.request.urlopen('http://sources.debian.net/api/search/' + name + '/')
+        data = json.loads(raw.read().decode('utf8'))
+        results = data['results']
+        if results['exact']:
+            return True
+        else:
+            print("Package " + name + " does not exist" + (", however you might want to try one of the following: " + ", ".join([pkg['name'] for pkg in results['other']]) if results['other'] else "") + ".")
+            return False
+        
+    def findVersion(name):
+        raw = urllib.request.urlopen('http://sources.debian.net/api/src/' + name + '/')
+        data = json.loads(raw.read().decode('utf8'))
+
+        def findByCodename(codename):
+            goodVersions = [version['version'] for version in data['versions'] if codename in version['suites']]
+            return goodVersions[0] if len(goodVersions) else False
+
+        try:
+            codename = subprocess.check_output(['lsb_release', '--codename', '--short']).decode('utf8').strip().lower()
+            choice = findByCodename(codename)
+            if choice:
+                return choice
+        except FileNotFoundError:
+            pass
+
+        return findByCodename('jessie')
+
+    def parseInfos(control):
+        paragraph = {}
+        key = ''
+
+        for line in control.strip().split('\n'):
+            if re.match('\s', line[0]):
+                try:
+                    paragraph[key] += '\n' + line.strip()
+                except KeyError:
+                    pass
+            elif re.match('^[\w-]+\:', line):
+                key = line.split(':')[0].lower()
+                paragraph[key] = line[len(key)+1:].strip()
+
+        return paragraph
+
+    def getArch():
+        arch = subprocess.check_output(['uname', '--machine']).decode('utf8').strip().lower()
+        if arch == 'x86_64':
+            arch = 'amd64'
+        return arch
+
+
+    def download(name, version):
+        arch = getArch()
+        filename =  name + '_' + version + '_' + arch
+
+        print("Downloading " + filename + "...")
+        url = DEBIAN_MIRROR + 'pool/main/' + (name[0] if name[0:3] != 'lib' else name[0:4]) + '/' + name + '/' + filename + '.deb'
+        debfile = LOCINST_TMP + '/' + filename + '.deb'
+        urllib.request.urlretrieve(url, debfile)
+
+        extractdir = LOCINST_TMP + '/' + filename
+        try:
+            os.mkdir(extractdir)
+        except FileExistsError:
+            pass
+        subprocess.check_call(['ar', 'x', debfile], cwd=extractdir)
+        subprocess.check_call(['rm', '-rf', debfile], stdout=subprocess.DEVNULL) 
+
+        controltar = [a for a in os.listdir(extractdir) if a.split('.')[:2] == ['control', 'tar']][0]
+        subprocess.check_call(['tar', 'xf', extractdir + '/' + controltar], cwd=extractdir)
+        with open(extractdir + '/control') as controlfile:
+            control = controlfile.read()
+
+        finaldir = LOCINST_TMP + '/' + name
+        try:
+            os.mkdir(finaldir)
+        except FileExistsError:
+            pass
+        datatar = [a for a in os.listdir(extractdir) if a.split('.')[:2] == ['data', 'tar']][0]
+        subprocess.check_call(['tar', 'xf', extractdir + '/' + datatar], cwd=finaldir)
+
+        subprocess.check_call(['rm', '-rf', extractdir]) 
+        return {
+                'final': finaldir,
+                'control': control
+        }
+
+
+    if not findPackage(name):
+        return 4
+
+    if globallyInstalled(name):
+        return 5
+
+    print("Installing " + name + "...")
+    version = findVersion(name)
+
+    if not version:
+        return 6
+
+    d = download(name, version)
+    finaldir, control = d['final'], d['control']
+
+    infos = parseInfos(control)
+
+    if 'depends' in infos:
+        for dep in infos['depends'].split(', '):
+            dep = dep.strip().split(' ')[0]
+            if not globallyInstalled(dep):
+                # print("Installing " + dep + " as a dependency")
+                # debian_install(dep)
+
+                # TODO For compatibility until locinst.sh is rewritten
+                try:
+                    subprocess.check_call([os.environ['HOME'] + '/.scripts/locinst.sh', 'debian', dep])
+                except subprocess.CalledProcessError:
+                    pass
+            
+    if 'recommends' in infos:
+        for rec in infos['recommends'].split(','):
+            print(name + " suggests you to install: " + rec.strip())
+
+    return 0
+
+# TODO For compatibility until locinst.sh is rewritten
+exit(debian_install(sys.argv[1]))

scripts/locinst.sh

@@ -156,8 +156,12 @@ function locinst { # action package [other_info]*
 			locinst_pypi $dest $package $*
 			code=$?
 			;;
+		"debian")
+			$HOME/.scripts/locinst.py $package $*
+			code=$?
+			;;
 		*)
-			error "I don't know what to do. And don't beg for help with the commands."
+			#error "I don't know what to do. And don't beg for help with the commands."
 			return 1
 			;;
 	esac
@@ -182,6 +186,9 @@ function locinst { # action package [other_info]*
 		5)
 			error "Package already installed on system!"
 			;;
+		6)
+			error "Could not satisfy version requirements!"
+			;;
 		*)
 			error "Ugh... Something bad happened"
 	esac
@@ -191,4 +198,6 @@ function locinst { # action package [other_info]*
 
 }
 
-#
+if [ -n $1 ]; then
+    locinst $@
+fi