Testing new ci/cd infra (#55)

Update the CI/CD pipelines

* move from generic `alps-uenv` repository to DockerHub `uenv` registry on JFrog
* use oras to manage images and associate artifacts with images
* parameterize the CI/CD pipeline

.gitignore

@@ -2,10 +2,17 @@ log*
 stackinator
 recipes/*/*core/mirrors.yaml
 cache.yaml
+/pipeline.yml
 
 # vim temp files
 .*.sw[pnoq]
 
 # documentation working files
 site
 env
+
+# oras binary, downloaded during build
+oras
+
+ci/.pyenv
+__pycache__

ci/ci.yml

@@ -0,0 +1,23 @@
+stages:
+  - configure
+  - run
+
+pipeline-configure:
+  stage: configure
+  tags: [clariden-login-baremetal]
+  script:
+    - ./ci/configure-pipeline
+  artifacts:
+    paths:
+      - pipeline.yml
+
+generated-pipeline:
+  stage: run
+  needs: [pipeline-configure]
+  variables:
+    CSCS_CI_MW_URL: $CSCS_CI_MW_URL
+  trigger:
+    include:
+      - artifact: pipeline.yml
+        job: pipeline-configure
+    strategy: depend

ci/config/ci.py

@@ -0,0 +1,141 @@
+#!/usr/bin/env python3
+
+import jinja2
+import jsonschema
+import os
+import pathlib
+import sys
+import yaml
+
+prefix = pathlib.Path(__file__).parent.resolve()
+root_path = prefix.parent.resolve().parent.resolve()
+recipe_path = root_path / "recipes"
+
+sys.path = [prefix.as_posix()] + sys.path
+
+import configuration
+import util
+
+class EnvError(Exception):
+    """EnvError when invalid environment variables are provided
+    """
+
+    def __init__(self, message):
+        self.message = f"Environment: {message}"
+        super().__init__(self.message)
+
+def readenv(config):
+    """
+    returns a dictionary with the following fields:
+    {
+        'system': 'clariden',
+        'uarch': 'a100',
+        'uenv': 'gromacs',
+        'version': '2023',
+        'recipe': configuration.Version
+    }
+
+    based on the values of the environment variables:
+        - system
+        - uarch
+        - uenv
+    """
+
+    system = os.getenv("system", default=None)
+    uarch = os.getenv("uarch", default=None)
+    target = os.getenv("uenv", default=None)
+
+    if system is None:
+        raise EnvError("'system' environment variable not set")
+    if uarch is None:
+        raise EnvError("'uarch' environment variable not set")
+    if target is None:
+        raise EnvError("'uenv' environment variable not set")
+
+    # check that system+uarch are valid
+    if uarch not in configuration.valid_uarch:
+        raise EnvError(f"uarch={uarch} is not one of the available options {configuration.valid_uarch}")
+    valid, msg = config.is_valid_target(system, uarch)
+    if not valid:
+        raise EnvError(f"{msg}")
+
+    try:
+        uenv, version = target.split(':')
+    except:
+        raise EnvError(f"invalid format of uenv={target}, expected 'name:version'")
+
+    # TODO: check that the recipe-version also supports uarch
+    recipe = config.recipe(uenv, version, uarch)
+    if recipe is None:
+        raise EnvError(f"the recipe 'name:version' is not available")
+
+    return {
+        "system": system,
+        "uarch": uarch,
+        "uenv": uenv,
+        "version": version,
+        "recipe": recipe,
+    }
+
+if __name__ == "__main__":
+    ### TODO ###
+    # read CLI arguments
+    #   - output path for the pipeline.yml file (required)
+    #   - path of the configuration file (required)
+    #   - JOB_ID (if needed?)
+    if os.getenv("UENVCITEST", default=None) is not None:
+        os.environ["system"] = "clariden"
+        os.environ["uarch"] = "a100"
+        os.environ["uenv"] = "gromacs:2023"
+
+    # read and validate the configuration
+    print(recipe_path)
+    try:
+        config = configuration.Config(prefix / "../../config.yaml", recipe_path)
+    except jsonschema.exceptions.ValidationError as e:
+        print()
+        where = e.json_path.replace("$.","").replace(".", ":")
+        print(f"{util.colorize('[error] ', 'red')}config.yaml:{where}")
+        print(f"  {e.message}")
+        exit(1)
+    except configuration.ConfigError as e:
+        print()
+        print(f"{util.colorize('[error] ', 'red')}{e.message}")
+        exit(1)
+
+    # read environment variables that describe image(s) to build in this run
+    try:
+        env = readenv(config)
+    except EnvError as e:
+        print()
+        print(f"{util.colorize('[error] ', 'red')}{e.message}")
+        exit(1)
+
+    print(f"--- request -----------------------------------------")
+    for k,i in env.items():
+        print(f"{k:20s}: {i}")
+
+    print(f"\n--- job template ------------------------------------")
+    job = config.job_template(env)
+    for k,i in job.items():
+        print(f"{k:20s}: {i}")
+
+    #
+    # write the pipeline.yml using jinja template
+    #
+
+    # load the jinja templating environment
+    template_path = prefix / "templates"
+    jinja_env = jinja2.Environment(
+        loader=jinja2.FileSystemLoader(template_path),
+        trim_blocks=True,
+        lstrip_blocks=True,
+    )
+
+    # generate top level makefiles
+    pipeline_template = jinja_env.get_template("pipeline.yml")
+
+    with (root_path / "pipeline.yml").open("w") as f:
+        f.write(pipeline_template.render(jobs=[job]))
+
+