Invocation server: add links to blob references in analysis errors

When using a serve endpoint, analysis errors my contain a reference to
a build failure on serve, shown as 'blob <hash>'. For each such blob
reference add a link offering to read this blob.

2 files changed, 17 insertions, 2 deletions

diff --git a/doc/invocations-http-server/server.py b/doc/invocations-http-server/server.py
index 05832ada..6ff6b668 100755
--- a/doc/invocations-http-server/server.py
+++ b/doc/invocations-http-server/server.py
@@ -15,6 +15,7 @@
 
 import jinja2
 import json
+import re
 import os
 import subprocess
 import werkzeug.exceptions
@@ -328,7 +329,14 @@ class InvocationServer:
 
         params["repo_config"] = meta.get('configuration')
         params["exit_code"] = profile.get('exit code')
-        params["analysis_errors"] = profile.get('analysis errors', [])
+        analysis_errors = []
+        blob_pattern = re.compile(r'blob ([0-9A-Za-z]{40,64})')
+        for s in profile.get('analysis errors', []):
+            analysis_errors.append({
+                "msg": s,
+                "blobs": blob_pattern.findall(s),
+            })
+        params["analysis_errors"] = analysis_errors
         params["remote_address"] = profile.get('remote', {}).get('address')
         remote_props = []
         for k, v in profile.get('remote', {}).get('properties', {}).items():
diff --git a/doc/invocations-http-server/templates/invocation.html b/doc/invocations-http-server/templates/invocation.html
index c8d77f58..50d5690a 100644
--- a/doc/invocations-http-server/templates/invocation.html
+++ b/doc/invocations-http-server/templates/invocation.html
@@ -158,7 +158,14 @@ Inocations {{invocation | e}}
 <h2>Analysis errors</h2>
 <ul>
   {% for error in analysis_errors %}
-  <li> <pre>{{ error | e}}</pre></li>
+  <li> <pre>{{ error["msg"] | e}}</pre>
+    {% if error["blobs"] %}
+    Blobs:
+    {% for blob in error["blobs"] %}
+    <a href="/blob/{{ blob | e }}"><tt>{{ blob | e }}</tt></a>
+    {% endfor %}
+    {% endif %}
+  </li>
   {% endfor %}
 </ul>
 {% else %}