From 0cd59aa46815e6b920e6f0a3a9d688dad24caf4d Mon Sep 17 00:00:00 2001
From: "a.b.christie" <alan.christie@matildapeak.com>
Date: Wed, 11 Mar 2026 11:39:58 +0000
Subject: [PATCH 1/3] feat: Add get_environment_constants()

---
 decoder/decoder.py | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/decoder/decoder.py b/decoder/decoder.py
index 90f51ab..7ab1fc5 100644
--- a/decoder/decoder.py
+++ b/decoder/decoder.py
@@ -323,6 +323,27 @@ def get_environment_assets(job_definition: Dict[str, Any]) -> List[Dict[str, str
     return env_assets
 
 
+def get_environment_constants(job_definition: Dict[str, Any]) -> List[Dict[str, str]]:
+    """Given a Job definition this function returns the list of all the
+    environment-based image constants declared. What's returned is a list
+    of the environment variable's name and its value.
+    """
+    env_constants: List[Dict[str, str]] = []
+    # Iterate through the environment block...
+    environment: List[Dict[str, Any]] = job_definition.get("image", {}).get(
+        "environment", []
+    )
+    env_constants.extend(
+        {
+            item["name"]: item["value-from"]["constant"]["value"],
+        }
+        for item in environment
+        if "constant" in item["value-from"]
+    )
+
+    return env_constants
+
+
 def get_jobs_replaced(job_definition: Dict[str, Any]) -> Optional[List[str]]:
     """Given a Job Definition this function returns the Jobs it replaces.
     The returned list is a list of jobs identified by collection and

From 57d7d6559a7cc5596a8077539070b8e283786f04 Mon Sep 17 00:00:00 2001
From: "a.b.christie" <alan.christie@matildapeak.com>
Date: Wed, 11 Mar 2026 11:52:56 +0000
Subject: [PATCH 2/3] test: Add test for constants

---
 tests/test_get_environment_constants.py | 29 +++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 tests/test_get_environment_constants.py

diff --git a/tests/test_get_environment_constants.py b/tests/test_get_environment_constants.py
new file mode 100644
index 0000000..471f717
--- /dev/null
+++ b/tests/test_get_environment_constants.py
@@ -0,0 +1,29 @@
+# Tests for the decoder's get_environment_assets() function.
+from typing import Dict
+
+import pytest
+
+pytestmark = pytest.mark.unit
+
+from decoder import decoder
+
+
+def test_get_environment_constants():
+    # Arrange
+    job_definition: Dict = {
+        "image": {
+            "environment": [
+                {
+                    "name": "BLOB",
+                    "value-from": {"constant": {"value": "42"}},
+                }
+            ],
+        },
+    }
+
+    # Act
+    env_assets = decoder.get_environment_constants(job_definition)
+
+    # Assert
+    assert len(env_assets) == 1
+    assert env_assets[0]["BLOB"] == "42"

From 1b35a6cf7dc65025dd12d7c8dfdd502f56689e26 Mon Sep 17 00:00:00 2001
From: "a.b.christie" <alan.christie@matildapeak.com>
Date: Wed, 11 Mar 2026 11:54:58 +0000
Subject: [PATCH 3/3] ci: Update action versions

---
 .github/workflows/build.yaml   | 4 ++--
 .github/workflows/publish.yaml | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 7132e13..83688b6 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -37,9 +37,9 @@ jobs:
         - '3.13'
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install requirements
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 99183b1..4174fb8 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -31,11 +31,11 @@ jobs:
       id-token: write  # IMPORTANT: this permission is mandatory for trusted publishing
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Inject slug/short variables
-      uses: rlespinasse/github-slug-action@v4
+      uses: rlespinasse/github-slug-action@v5
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: '3.12'
     - name: Install dependencies