From 5f45ce254bab8cfd5f93fa1978e588e1e126c06b Mon Sep 17 00:00:00 2001
From: Cody Taylor <codemister99@yahoo.com>
Date: Sat, 1 Mar 2025 20:43:22 -0500
Subject: [PATCH 1/2] Add feature: deno-cache.

---
 src/deno-cache/NOTES.md                       |  6 +++++
 src/deno-cache/devcontainer-feature.json      | 25 +++++++++++++++++++
 src/deno-cache/install.sh                     | 24 ++++++++++++++++++
 .../denoland_deno__debian__custom_user.sh     | 14 +++++++++++
 test/deno-cache/scenarios.json                | 12 +++++++++
 test/deno-cache/test.sh                       | 12 +++++++++
 6 files changed, 93 insertions(+)
 create mode 100644 src/deno-cache/NOTES.md
 create mode 100644 src/deno-cache/devcontainer-feature.json
 create mode 100644 src/deno-cache/install.sh
 create mode 100644 test/deno-cache/denoland_deno__debian__custom_user.sh
 create mode 100644 test/deno-cache/scenarios.json
 create mode 100644 test/deno-cache/test.sh

diff --git a/src/deno-cache/NOTES.md b/src/deno-cache/NOTES.md
new file mode 100644
index 0000000..754bb96
--- /dev/null
+++ b/src/deno-cache/NOTES.md
@@ -0,0 +1,6 @@
+# Deno Cache
+
+Setup the [deno cache](https://jsr.io/@deno/cache-dir) as a volume.
+
+Intended for usage with the `denoland/deno:debian` docker image. Otherwise,
+will create a `deno` group with read-write permissions on the cache directory.
diff --git a/src/deno-cache/devcontainer-feature.json b/src/deno-cache/devcontainer-feature.json
new file mode 100644
index 0000000..69273fb
--- /dev/null
+++ b/src/deno-cache/devcontainer-feature.json
@@ -0,0 +1,25 @@
+{
+    "id": "deno-cache",
+    "name": "Deno cache setup",
+    "version": "0.1.0",
+    "containerEnv": {
+        "DENO_DIR": "/deno-dir"
+    },
+    "options": {
+        "username": {
+            "description": "Add the 'deno' group to the given non-root user. Defaults to the value of `remoteUser`.",
+            "default": "automatic",
+            "type": "string"
+        }
+    },
+    "mounts": [
+        {
+            "source": "deno-cache-${devcontainerId}",
+            "target": "/deno-dir",
+            "type": "volume"
+        }
+    ],
+    "installsAfter": [
+        "ghcr.io/devcontainers/features/common-utils"
+    ]
+}
diff --git a/src/deno-cache/install.sh b/src/deno-cache/install.sh
new file mode 100644
index 0000000..0925567
--- /dev/null
+++ b/src/deno-cache/install.sh
@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+set -e
+
+GROUP=deno
+
+echo "Creating cache directory: $DENO_DIR"
+mkdir --parents "$DENO_DIR"
+
+echo "Creating user group: $GROUP"
+groupadd --force --key GID_MIN=1993 "$GROUP"
+
+echo "Assigning group to cache directory..."
+chgrp --changes --recursive "$GROUP" "$DENO_DIR"
+
+echo "Assigning permissions with sticky group..."
+chmod --changes --recursive 2775     "$DENO_DIR"
+
+echo "Appending group ${GROUP@Q} to user..."
+if [[ "$USERNAME" == "automatic" ]]; then
+    usermod --append --groups "$GROUP" "$_REMOTE_USER"
+elif [[ -n "$USERNAME" && "$USERNAME" != "root" ]]; then
+    usermod --append --groups "$GROUP" "$USERNAME"
+fi
diff --git a/test/deno-cache/denoland_deno__debian__custom_user.sh b/test/deno-cache/denoland_deno__debian__custom_user.sh
new file mode 100644
index 0000000..8775191
--- /dev/null
+++ b/test/deno-cache/denoland_deno__debian__custom_user.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+set -e
+
+source dev-container-features-test-lib
+
+check "Group exists" getent group deno
+check "Directory /deno-dir exists" test -d "$DENO_DIR"
+check "Group is set" test "$(stat --printf="%G" "$DENO_DIR")" == "deno"
+check "Permissions are set" test "$(stat --printf="%a" "$DENO_DIR")" -eq 2775
+check "Remote user is in the deno group" bash -c "getent group deno | grep jsr"
+check "Run deno info" deno info "jsr:@deno/cache-dir"
+
+reportResults
diff --git a/test/deno-cache/scenarios.json b/test/deno-cache/scenarios.json
new file mode 100644
index 0000000..4bdff8d
--- /dev/null
+++ b/test/deno-cache/scenarios.json
@@ -0,0 +1,12 @@
+{
+    "denoland_deno__debian__custom_user": {
+        "image": "denoland/deno:debian",
+        "remoteUser": "jsr",
+        "features": {
+            "deno-cache": {},
+            "ghcr.io/devcontainers/features/common-utils:2": {
+                "username": "jsr"
+            }
+        }
+    }
+}
diff --git a/test/deno-cache/test.sh b/test/deno-cache/test.sh
new file mode 100644
index 0000000..6939650
--- /dev/null
+++ b/test/deno-cache/test.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -e
+
+source dev-container-features-test-lib
+
+check "Group exists" getent group deno
+check "Directory /deno-dir exists" test -d "$DENO_DIR"
+check "Group is set" test "$(stat --printf="%G" "$DENO_DIR")" == "deno"
+check "Permissions are set" test "$(stat --printf="%a" "$DENO_DIR")" -eq 2775
+
+reportResults

From 667af14374dea1888a23b0f948d1963ffc73c86a Mon Sep 17 00:00:00 2001
From: Cody Taylor <codemister99@yahoo.com>
Date: Sat, 1 Mar 2025 20:56:45 -0500
Subject: [PATCH 2/2] ci: Test deno-cache

---
 .github/workflows/test.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 32db3a4..17f7bf6 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -14,6 +14,7 @@ jobs:
       matrix:
         features:
           - circleci-cli
+          - deno-cache
           - exercism-cli
         baseImage:
           - debian:latest