tools: FEATURE.yaml meta-data infrastructure

Add tooling for feature metadata configuration files.
The main tool is in src/scripts/fts.py

make checkfeaturelist to validate against schema.
make featurelist to dump all feature lists to stdout.

Example feature definition:

name: IP in IP tunnelling
maintainer: Ole Troan <ot@cisco.com>
features:
  - IPv4/IPv6 over IPv4/IPv6 encapsulation:
    - Fragmentation and Reassembly
    - Configurable MTU
    - Inner to outer Traffic Class / TOS copy
    - Configurable Traffic Class / TOS
  - ICMPv4 / ICMPv6 proxying
  - 6RD (RFC5969):
    - Border Relay

description: "Implements IP{v4,v6} over IP{v4,v6} tunnelling as
              described in RFC2473. This module also implement the border relay of
	      6RD (RFC5969)."

state: production
properties: [API, CLI, STATS, MULTITHREAD]
missing:
  - Tunnel PMTUD
  - Tracking of FIB state for tunnel state
  - IPv6 extension headers (Tunnel encapsulation limit option)

JSON schema is embedded in fts.py

Example markdown: https://github.com/otroan/scratch/blob/master/features.md

Change-Id: I903b4ee6b316a9378c259e86dc937092e5d4b7da
Type: make
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 131 insertions, 0 deletions

diff --git a/src/scripts/fts.py b/src/scripts/fts.py
new file mode 100755
index 00000000000..6d224ddffe4
--- /dev/null
+++ b/src/scripts/fts.py
@@ -0,0 +1,131 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import ipaddress
+import yaml
+from pprint import pprint
+import re
+from jsonschema import validate
+import argparse
+from subprocess import run, PIPE
+
+# VPP feature JSON schema
+schema = {
+    "$schema": "http://json-schema.org/schema#",
+    "type": "object",
+    "properties": {
+        "name": {"type": "string"},
+        "description": { "type": "string" },
+        "maintainer": { "type": "string" },
+        "state": {"type": "string",
+                  "enum": ["production", "experimental"]},
+        "features": { "$ref": "#/definitions/features" },
+        "missing": { "$ref": "#/definitions/features" },
+        "properties": { "type": "array",
+                       "items": { "type": "string",
+                                  "enum": ["API", "CLI", "STATS", "MULTITHREAD"] },
+                       },
+    },
+    "additionalProperties": False,
+    "definitions": {
+        "featureobject": {
+            "type": "object",
+            "patternProperties": {
+                "^.*$": { "$ref": "#/definitions/features" },
+            },
+        },
+        "features": {
+            "type": "array",
+            "items": {"anyOf": [{ "$ref": "#/definitions/featureobject" },
+                      { "type": "string" },
+            ]},
+            "minItems": 1,
+        },
+    },
+}
+
+
+
+def filelist_from_git_status():
+    filelist = []
+    git_status = 'git status --porcelain */FEATURE.yaml'
+    rv = run(git_status.split(), stdout=PIPE, stderr=PIPE)
+    if rv.returncode != 0:
+        sys.exit(rv.returncode)
+
+    for l in rv.stdout.decode('ascii').split('\n'):
+        if len(l):
+            filelist.append(l.split()[1])
+    return filelist
+
+def filelist_from_git_ls():
+    filelist = []
+    git_ls = 'git ls-files :(top)*/FEATURE.yaml'
+    rv = run(git_ls.split(), stdout=PIPE, stderr=PIPE)
+    if rv.returncode != 0:
+        sys.exit(rv.returncode)
+
+    for l in rv.stdout.decode('ascii').split('\n'):
+        if len(l):
+            filelist.append(l)
+    return filelist
+
+def output_features(indent, fl):
+    for f in fl:
+        if type(f) is dict:
+            for k,v in f.items():
+                print('{}- {}'.format(' ' * indent, k))
+                output_features(indent + 2, v)
+        else:
+            print('{}- {}'.format(' ' * indent, f))
+
+def output_markdown(features):
+    for k,v in features.items():
+        print('# {}'.format(v['name']))
+        print('Maintainer: {}  '.format(v['maintainer']))
+        print('State: {}\n'.format(v['state']))
+        print('{}\n'.format(v['description']))
+        output_features(0, v['features'])
+        if 'missing' in v:
+            print('\n## Missing')
+            output_features(0, v['missing'])
+        print()
+
+def main():
+    parser = argparse.ArgumentParser(description='VPP Feature List.')
+    parser.add_argument('--validate', dest='validate', action='store_true',
+                        help='validate the FEATURE.yaml file')
+    parser.add_argument('--git-status', dest='git_status', action='store_true',
+                        help='Get filelist from git status')
+    parser.add_argument('--all', dest='all', action='store_true',
+                        help='Validate all files in repository')
+    parser.add_argument('--markdown', dest='markdown', action='store_true',
+                        help='Output feature table in markdown')
+    parser.add_argument('infile', nargs='?', type=argparse.FileType('r'),
+                        default=sys.stdin)
+    args = parser.parse_args()
+
+    features = {}
+
+    if args.git_status:
+        filelist = filelist_from_git_status()
+    elif args.all:
+        filelist = filelist_from_git_ls()
+    else:
+        filelist = args.infile
+
+    for featurefile in filelist:
+        featurefile = featurefile.rstrip()
+
+        # Load configuration file
+        with open(featurefile) as f:
+            cfg = yaml.load(f)
+        validate(instance=cfg, schema=schema)
+        features[featurefile] = cfg
+
+    if args.markdown:
+        output_markdown(features)
+
+if __name__ == '__main__':
+    main()