Make the build log available to the users

managetests/branches.py

@@ -99,6 +99,11 @@ class Branch:
 
         return True
 
+    def has_build_log(self):
+        """Check if the branch has a build log"""
+        path = self.manager.root / "branches" / self.name / "build.log"
+        return path.exists()
+
     def load_config(self):
         """Load the configuration of this branch"""
         file = self.manager.root / "branches" / self.name / "config.json"
@@ -136,7 +141,17 @@ class Branch:
                 part = part.replace("{{%s}}" % key, value)
             command.append(part)
 
-        return [command], {"env": env, "cwd": str(home)}
+        kwargs = {"env": env, "cwd": str(home)}
+
+        if build:
+            log_path = base / "build.log"
+
+            # Log standard output and error
+            kwargs["stdin"] = subprocess.DEVNULL
+            kwargs["stdout"] = log_path.open("a")
+            kwargs["stderr"] = subprocess.STDOUT
+
+        return [command], kwargs
 
     def deploy(self):
         """Deploy the branch"""
@@ -146,7 +161,7 @@ class Branch:
         if self.present:
             return
 
-        print("[i] Started a build of '%s'" % self.name)
+        print("[i] Started a build of the '%s' branch" % self.name)
 
         # Start from a fresh branch dir
         branch = self.manager.root / "branches" / self.name
@@ -156,6 +171,15 @@ class Branch:
 
         git_dir = str(self.manager.root / "git")
         build_dir = branch / "build"
+        log_file = branch / "build.log"
+
+        # Clear the log file
+        log_file.open("w").close()
+
+        def log(msg):
+            """Utility function to log a message to the build log"""
+            with log_file.open("a") as f:
+                f.write(msg)
 
         # Create subdirectories
         build_dir.mkdir()
@@ -165,16 +189,18 @@ class Branch:
             f.write("%s\n" % BRANCH_DIR_VERSION)
 
         # Update the bare git repository and checkout the branch
-        subprocess.call(["git", "--git-dir", git_dir, "fetch", "origin"])
+        subprocess.call([
+            "git", "--git-dir", git_dir, "fetch", "origin"
+        ], stdout=log_file.open("a"), stderr=subprocess.STDOUT)
         subprocess.call([
             "git", "--git-dir", git_dir, "--work-tree", str(build_dir),
             "checkout", "-f", self.name,
-        ])
+        ], stdout=log_file.open("a"), stderr=subprocess.STDOUT)
 
         # Copy and load the configuration file
         if not (build_dir / "managetests.json").exists():
-            print("[!] No managetests.json found in the branch!")
-            print("[!] Aborting!")
+            log("[!] No managetests.json found in the branch!")
+            log("[!] Aborting!")
             return False
 
         shutil.copy(
@@ -203,7 +229,7 @@ class Branch:
                 }, build=True)
 
         if total == 0:
-            print("[!] Warning: no artifact was installed!")
+            log("[!] Warning: no artifact was installed!")
 
         # Delete the build directory
         shutil.rmtree(str(build_dir))

managetests/frontend/__init__.py

@@ -63,6 +63,15 @@ def create_app(manager, processor):
 
         return flask.render_template("index.html", branches=branches)
 
+    @app.route("/+logs/<branch>/build.log")
+    def build_log(branch):
+        path = manager.root / "branches" / branch / "build.log"
+
+        if not path.exists():
+            flask.abort(404)
+
+        return flask.send_file(str(path), mimetype="text/plain")
+
     @app.route("/+hook/<token>", methods=["POST"])
     def hook(token):
         if token != manager.config["hooks-token"]: