Add post about weldr-client

_posts/2021-12-14-Weldr-Client.md

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+---
+layout: post
+title: composer-cli update
+author: bcl
+tags: weldr composer-cli
+---
+
+As I wrote [back in May](https://weldr.io/Project-Updates/), `lorax-composer`
+and `composer-cli` are no longer under active development. When RHEL 8.6.0 is
+release `composer-cli` will be provided by [weldr-client
+repo](https://github.com/osbuild/weldr-client), a complete rewrite of the tool
+using Go.
+
+The rewrite uses the [cobra library](https://github.com/spf13/cobra) to handle
+the command parsing instead of the 'minimum viable parser' I wrote for the
+python version. The JSON output format is consistently supported since it is
+now implemented at a lower level than before. And error reporting should be
+more clear, with consistent return codes and errors that come from the API
+server.
+
+The project has moved under the umbrella of the
+[osbuild](https://github.com/osbuild/) project, with
+[weldr](https://github.com/weldr/) continuing to be the home of `lorax` and
+`livemedia-creator`.
+
+The JSON output now includes more details:
+
+    [root@localhost ~]# composer-cli --json blueprints list
+    {
+        "method": "GET",
+        "path": "/blueprints/list?limit=0",
+        "status": 200,
+        "body": {
+            "blueprints": [],
+            "limit": 0,
+            "offset": 0,
+            "total": 1
+        }
+    }
+    {
+        "method": "GET",
+        "path": "/blueprints/list?limit=1",
+        "status": 200,
+        "body": {
+            "blueprints": [
+                "bcl-tmux"
+            ],
+            "limit": 1,
+            "offset": 0,
+            "total": 1
+        }
+    }
+
+The `method`, `path`, and `status` are added to each call, and the response is
+in the `body` section.  Some commands, like this `blueprints list` command,
+involve multiple calls to the server so the output may contain more than 1 JSON
+object as you can see.
+
+One of the goals of the rewrite was to make the code easier to maintain,
+extend, and use so in addition to switching to go and a real command parser it
+includes [a library](https://github.com/osbuild/weldr-client/tree/main/weldr)
+that the `composer-cli` command uses to communicate with the API server. You
+can use it to write your own applications to interact with the
+`osbuild-composer` server.
+