auto-install Python requirements from pulled repositories

CHANGES.txt

@@ -3,6 +3,7 @@
   * removed outdated and unnecessary files
   * added --command flag to "run docker" to run a specific command such as
     ck run docker:xyz --command="ck show env"
+  * auto-install Python requirements from pulled repositories
 
 * V2.4.0
   * added module "docker.template" to support adaptive CK containers

ck/repo/module/repo/module.py

@@ -610,6 +610,12 @@ def add(i):
     if r['return'] > 0:
         return r
 
+    # Check Python requirements
+    r = requirements({'path':p,
+                      'out':o})
+    if r['return'] > 0:
+        return r
+
     # Check deps
     if o == 'con':
         ck.out('  ========================================')
@@ -1189,6 +1195,12 @@ def pull(i):
 
         # Check deps
         if tt != 'clone':  # clone is done in add ...
+            # Check Python requirements
+            r = requirements({'path':p,
+                              'out':o})
+            if r['return'] > 0:
+                return r
+
             if o == 'con':
                 ck.out('  ========================================')
                 ck.out('  Checking dependencies on other repos ...')
@@ -2095,6 +2107,45 @@ def import_repo(i):
     i['import'] = 'yes'
     return add(i)
 
+##############################################################################
+# process requirements
+
+def requirements(i):
+    """
+    Input:  {
+              (path)          - path to .cmr.json
+            }
+
+    Output: {
+              return       - return code =  0, if successful
+                                         >  0, if error
+              (error)      - error text if return > 0
+            }
+
+    """
+
+    if ck.cfg.get('skip_repo_requirements','')!='yes':
+
+        o=i.get('out','')
+        p=i['path']
+
+        if p!='':
+            p1=os.path.join(p, 'requirements.txt')
+            if os.path.isfile(p1):
+                if o == 'con':
+                    import sys
+                    c = sys.executable + ' -m pip install -r '+p1
+
+                    ck.out('  ========================================')
+                    ck.out('  Processing Python requirements ...')
+                    ck.out('')
+                    ck.out('  '+c)
+                    ck.out('')
+
+                    os.system(c)
+
+    return {'return':0}
+
 ##############################################################################
 # resolve dependencies for a repo