software/ors-amarisoft: slapos-render-config: Retarget currently generated...

software/ors-amarisoft: slapos-render-config: Retarget currently generated enb.cfg and gnb.cfg to out/ors/

Besides ORS we will soon add other cases to enb.cfg generation. It will be
handy to clearly see what is what and to keep ORS case to be also alive and distinguished.

Prepare to that by emitting generated enb.cfg and gnb.cfg to out/ors/enb/ and
out/ors/gnb instead of just out. Name the file itself enb.cfg always to match
what happens for real in the SR.

There is no change to generated files - it is only renaming:

```
$ ./pythonwitheggs slapos-render-config.py && xdiff config/{old,out}
```

```diff
diff --git a/config/old/enb.cfg b/config/out/ors/enb/enb.cfg
similarity index 100%
rename from config/old/enb.cfg
rename to config/out/ors/enb/enb.cfg
diff --git a/config/old/gnb.cfg b/config/out/ors/gnb/enb.cfg
similarity index 100%
rename from config/old/gnb.cfg
rename to config/out/ors/gnb/enb.cfg
```

software/ors-amarisoft/slapos-render-config.py

@@ -6,11 +6,14 @@
 import zc.buildout.buildout # XXX workaround for https://lab.nexedi.com/nexedi/slapos.recipe.template/merge_requests/9
 from slapos.recipe.template import jinja2_template
 
-import json, os, glob
+import json, os, shutil
 
 
 # j2render renders config/<src> into config/out/<out> with provided json parameters.
 def j2render(src, out, jcfg):
+    src = 'config/{}'.format(src)
+    out = 'config/out/{}'.format(out)
+
     ctx = json.loads(jcfg)
     assert '_standalone' not in ctx
     ctx['_standalone'] = True
@@ -21,8 +24,8 @@ def j2render(src, out, jcfg):
     buildout = None # stub
     r = jinja2_template.Recipe(buildout, "recipe", {
       'extensions': 'jinja2.ext.do',
-      'url': 'config/{}'.format(src),
-      'output': 'config/out/{}'.format(out),
+      'url': src,
+      'output': out,
       'context': textctx,
       'import-list': '''
         rawfile slaplte.jinja2 slaplte.jinja2''',
@@ -35,7 +38,8 @@ def j2render(src, out, jcfg):
             return f.read()
     r._read = _read
 
-    with open('config/out/{}'.format(out), 'w+') as f:
+    os.makedirs(os.path.dirname(out), exist_ok=True)
+    with open(out, 'w+') as f:
       f.write(r._render().decode())
 
 
@@ -109,7 +113,7 @@ def do_enb():
         'rx_gain':      43,
     }
 
-    do('enb.jinja2.cfg', 'enb.cfg', {
+    do('enb.jinja2.cfg', 'ors/enb/enb.cfg', {
         'enb_id': "0x1A2D0",
         'cell_list': {'CELL': {
             'cell_type':    'lte',
@@ -128,7 +132,7 @@ def do_enb():
         'plmn_list':  {"1": {'plmn': '00101'}},
         "ncell_list": {'1': peer_lte},
     })
-    do('enb.jinja2.cfg', 'gnb.cfg', {
+    do('enb.jinja2.cfg', 'ors/gnb/enb.cfg', {
         'gnb_id': "0x12345",
         'gnb_id_bits':  28,
         'cell_list': {'CELL': {
@@ -159,9 +163,8 @@ def do_ue():
 
 
 def main():
-    os.makedirs('config/out', exist_ok=True)
-    for f in glob.glob('config/out/*'):
-        os.remove(f)
+    if os.path.exists('config/out'):
+        shutil.rmtree('config/out')
     do_enb()
     do_ue()