add var substitution support

Signed-off-by: Sylvain Hellegouarch <sh@defuze.org>

Author: Lawouach

CHANGELOG.md

@@ -4,6 +4,12 @@
 
 [Unreleased]: https://github.com/chaostoolkit/chaostoolkit-reporting/compare/0.14.3...HEAD
 
+### Added
+
+- Support to substitute values in arguments so we know how activities were
+  called. You can now pass `--var` and `--var-file` to generate the report
+  as you do when you run the experiment
+
 ## [0.14.3][] - 2023-06-09
 
 [0.14.3]: https://github.com/chaostoolkit/chaostoolkit-reporting/compare/0.14.2...0.14.3

chaosreport/__init__.py

@@ -10,7 +10,7 @@
 import tempfile
 from base64 import b64encode
 from datetime import datetime, timedelta
-from typing import List
+from typing import Any, Dict, List
 
 import cairosvg
 import dateparser
@@ -20,8 +20,11 @@
 import pygal
 import pypandoc
 import semver
+from chaoslib import merge_vars, substitute
 from chaoslib.caching import cache_activities, lookup_activity
-from chaoslib.types import Experiment, Journal, Run
+from chaoslib.configuration import load_configuration
+from chaoslib.secret import load_secrets
+from chaoslib.types import Configuration, Experiment, Journal, Run, Secrets
 from jinja2 import Environment, PackageLoader
 from logzero import logger
 from natural import date
@@ -244,7 +247,12 @@ def generate_report_header(
     return header
 
 
-def generate_report(journal_path: str, export_format: str = "markdown") -> str:
+def generate_report(
+    journal_path: str,
+    export_format: str = "markdown",
+    var: Dict[str, Any] = None,
+    var_file: List[str] = None,
+) -> str:
     """
     Generate a report document from a chaostoolkit journal.
 
@@ -267,7 +275,14 @@ def generate_report(journal_path: str, export_format: str = "markdown") -> str:
 
     generate_chart_from_metric_probes(journal, export_format)
     add_contribution_model(journal, export_format)
-    template = get_report_template(journal["chaoslib-version"])
+    config_vars, secret_vars = merge_vars(var, var_file) or (None, None)
+    config = load_configuration(
+        experiment.get("configuration", {}), config_vars
+    )
+    secrets = load_secrets(experiment.get("secrets", {}), secret_vars)
+    template = get_report_template(
+        journal["chaoslib-version"], configuration=config, secrets=secrets
+    )
     report = template.render(journal)
 
     return report
@@ -333,7 +348,10 @@ def save_report(
 
 
 def get_report_template(
-    report_version: str, default_template: str = "index.md"
+    report_version: str,
+    default_template: str = "index.md",
+    configuration: Configuration = None,
+    secrets: Secrets = None,
 ):
     """
     Retrieve and return the most appropriate template based on the
@@ -346,6 +364,13 @@ def get_report_template(
     env.globals["pretty_duration"] = lambda d0, d1: date.delta(
         dateparser.parse(d0), dateparser.parse(d1), words=False
     )[0]
+    env.globals["substitute"] = (
+        lambda args: {
+            k: substitute(v, configuration, secrets) for k, v in args.items()
+        }
+        if isinstance(args, dict)
+        else args
+    )
 
     if not report_version:
         return env.get_template(default_template)

chaosreport/cli.py

@@ -1,24 +1,62 @@
 # -*- coding: utf-8 -*-
 import os
 from glob import glob
+from typing import Any, Dict, List
 
 import click
+from chaoslib import convert_vars
 
 from chaosreport import generate_report, generate_report_header, save_report
 
 __all__ = ["report"]
 
 
+def validate_vars(
+    ctx: click.Context, param: click.Option, value: List[str]
+) -> Dict[str, Any]:
+    """
+    Process all `--var key=value` and return a dictionary of them with the
+    value converted to the appropriate type.
+    """
+    try:
+        return convert_vars(value)
+    except ValueError as x:
+        raise click.BadParameter(str(x))
+
+
 @click.command()
 @click.option(
     "--export-format",
     default="markdown",
     help="Format to export the report to: html, markdown, pdf.",
 )
+@click.option(
+    "--var",
+    multiple=True,
+    callback=validate_vars,
+    help="Specify substitution values for configuration only. Can "
+    "be provided multiple times. The pattern must be "
+    "key=value or key:type=value. In that latter case, the "
+    "value will be casted as the specified type. Supported "
+    "types are: int, float, bytes. No type specified means "
+    "a utf-8 decoded string.",
+)
+@click.option(
+    "--var-file",
+    multiple=True,
+    type=click.Path(exists=True),
+    help="Specify files that contain configuration and secret "
+    "substitution values. Either as a json/yaml payload where "
+    "each key has a value mapping to a configuration entry. "
+    "Or a .env file defining environment variables. "
+    "Can be provided multiple times.",
+)
 @click.argument("journal", type=click.Path(exists=True), nargs=-1)
 @click.argument("report", type=click.Path(exists=False), nargs=1)
 def report(
     export_format: str = "markdown",
+    var: Dict[str, Any] = None,
+    var_file: List[str] = None,
     journal: str = "journal.json",
     report: str = "report.md",
 ):
@@ -33,6 +71,6 @@ def report(
         journal = glob(journal)
 
     for journal in journal:
-        reports.append(generate_report(journal, export_format))
+        reports.append(generate_report(journal, export_format, var, var_file))
     save_report(header, reports, report_path, export_format)
     click.echo("Report generated as '{f}'".format(f=report))

chaosreport/template/index.md

@@ -117,22 +117,22 @@ The {{item.activity.type}} provider that was executed:
 | **Type**        | {{item.activity.provider.type}} |
 | **Path**        | {{item.activity.provider.path}} |
 | **Timeout**     | {{item.activity.provider.get("timeout", "N/A")}} | 
-| **Arguments**   | {{item.activity.provider.get("arguments", "N/A")}} | 
+| **Arguments**   | {{substitute(item.activity.provider.get("arguments", "N/A"))}} | 
 {% elif item.activity.provider.type == "http"  %}
 |                 |                                                            |
 | --------------- | ---------------------------------------------------------- |
 | **Type**        | {{item.activity.provider.type}} |
 | **URL**         | {{item.activity.provider.url}} |
 | **Method**      | {{item.activity.provider.get("method", "GET")}} | 
 | **Timeout**     | {{item.activity.provider.get("timeout", "N/A")}} | 
-| **Arguments**   | {{item.activity.provider.get("arguments", "N/A")}} | 
+| **Arguments**   | {{substitute(item.activity.provider.get("arguments", "N/A"))}} | 
 {% else %}
 |                 |                                                            |
 | --------------- | ---------------------------------------------------------- |
 | **Type**        | {{item.activity.provider.type}} |
 | **Module**      | {{item.activity.provider.module}} | 
 | **Function**    | {{item.activity.provider.func}} | 
-| **Arguments**   | {{item.activity.provider.get("arguments", "N/A")}} | 
+| **Arguments**   | {{substitute(item.activity.provider.get("arguments", "N/A"))}} | 
 {% endif %}
 
 {% if item.exception %}