packageurl handler added

libpackilog/__init__.py

@@ -1,5 +1,21 @@
 import requests
 import os
+import json
+
+
+def pull_in_dependencies(manifest, force=False):
+    ''' Handles pulling in dependencies '''
+    # Return immediately if there are no dependencies to handle
+    if 'dependencies' not in manifest:
+        return
+
+    for dependency in manifest['dependencies']:
+        if dependency['type'] not in dependency_handlers:
+            error = "ERROR: There is no handler for dependency type '{0}'."
+            print error.format(dependency['type'])
+            return
+        else:
+            dependency_handlers[dependency['type']](dependency, force)
 
 
 def file_dependency(dependency, force=False):
@@ -28,25 +44,54 @@ def file_dependency(dependency, force=False):
         else:
             error = "File {0} already exists, use -f flag to force overwrite"
             print error.format(filename)
+            return
     else:
         with open(filename, 'w') as fp:
             fp.write(req.text)
             print '{0} downloaded from {1}'.format(filename, source)
 
 
-dependency_handlers = {'file': file_dependency}
+def packageurl_dependency(dependency, force=False):
+    ''' Pulls down a package via URL '''
+    if 'source' not in dependency:
+        print 'source for a packageurl-based dependency was not defined'
+        return
 
+    source = dependency['source']
 
-def pull_in_dependencies(manifest, force=False):
-    ''' Handles pulling in dependencies '''
-    # Return immediately if there are no dependencies to handle
-    if 'dependencies' not in manifest:
+    # Get package manifest
+    source_manifest = source + '/packilog.json'
+    req = requests.get(source_manifest)
+    if req.status_code != 200:
+        error = "Failed to download dependency manifest from {0}: {1} {2}"
+        print error.format(source_manifest, req.status_code, req.reason)
         return
 
-    for dependency in manifest['dependencies']:
-        if dependency['type'] not in dependency_handlers:
-            error = "ERROR: There is no handler for dependency type '{0}'."
-            print error.format(dependency['type'])
-            return
-        else:
-            dependency_handlers[dependency['type']](dependency, force)
+    package_manifest = json.loads(req.text)
+    # Recursively handle dependencies
+    pull_in_dependencies(package_manifest)
+
+    # Pull in files referenced
+    if 'files' in package_manifest:
+        for filename in package_manifest['files']:
+            sourcepath = '{0}/{1}'.format(source, filename)
+            req = requests.get(sourcepath)
+            if req.status_code != 200:
+                error = "Failed to download dependency source from {0}: {1} {2}"
+                print error.format(sourcepath, req.status_code, req.reason)
+                return
+            if os.path.exists(filename) and not force:
+                if req.text == open(filename).read():
+                    print '{0} is up to date'.format(filename)
+                else:
+                    error = "File {0} already exists, use -f flag to force overwrite"
+                    print error.format(filename)
+                    return
+            else:
+                with open(filename, 'w') as fp:
+                    fp.write(req.text)
+                    print '{0} downloaded from {1}'.format(filename, source)
+
+
+dependency_handlers = {'file': file_dependency,
+                       'packageurl': packageurl_dependency}