support installing sccache from a custom github repository

Author: trxcllnt

features/src/sccache/.bashrc

@@ -1,4 +1,19 @@
-export RUSTC_WRAPPER=${RUSTC_WRAPPER:-/usr/bin/sccache};
-export CMAKE_C_COMPILER_LAUNCHER=${CMAKE_C_COMPILER_LAUNCHER:-/usr/bin/sccache};
-export CMAKE_CXX_COMPILER_LAUNCHER=${CMAKE_CXX_COMPILER_LAUNCHER:-/usr/bin/sccache};
-export CMAKE_CUDA_COMPILER_LAUNCHER=${CMAKE_CUDA_COMPILER_LAUNCHER:-/usr/bin/sccache};
+if test -z "${DISABLE_SCCACHE+x}"; then
+    # Log sccache server messages
+    export SCCACHE_ERROR_LOG="${SCCACHE_ERROR_LOG:-/var/log/devcontainer-utils/sccache.log}";
+    export SCCACHE_SERVER_LOG="${SCCACHE_SERVER_LOG:-sccache=info}";
+
+    # Use sccache for Rust, C, C++, and CUDA compilations
+    if ! test -v RUSTC_WRAPPER; then
+        export RUSTC_WRAPPER="${RUSTC_WRAPPER:-/usr/bin/sccache}";
+    fi
+    if ! test -v CMAKE_C_COMPILER_LAUNCHER; then
+        export CMAKE_C_COMPILER_LAUNCHER="${CMAKE_C_COMPILER_LAUNCHER:-/usr/bin/sccache}";
+    fi
+    if ! test -v CMAKE_CXX_COMPILER_LAUNCHER; then
+        export CMAKE_CXX_COMPILER_LAUNCHER="${CMAKE_CXX_COMPILER_LAUNCHER:-/usr/bin/sccache}";
+    fi
+    if ! test -v CMAKE_CUDA_COMPILER_LAUNCHER; then
+        export CMAKE_CUDA_COMPILER_LAUNCHER="${CMAKE_CUDA_COMPILER_LAUNCHER:-/usr/bin/sccache}";
+    fi
+fi

features/src/sccache/devcontainer-feature.json

@@ -1,9 +1,17 @@
 {
   "name": "sccache",
   "id": "sccache",
-  "version": "25.4.0",
+  "version": "25.4.1",
   "description": "A feature to install sccache",
   "options": {
+    "repository": {
+      "type": "string",
+      "proposals": [
+        "mozilla/sccache"
+      ],
+      "default": "mozilla/sccache",
+      "description": "The GitHub repository from which to install the sccache binary."
+    },
     "version": {
       "type": "string",
       "proposals": [

features/src/sccache/install.sh

@@ -2,6 +2,7 @@
 set -e
 
 SCCACHE_VERSION="${VERSION:-latest}";
+SCCACHE_REPOSITORY="${REPOSITORY:-"mozilla/sccache"}";
 
 # Ensure we're in this feature's directory during build
 cd "$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )";
@@ -13,14 +14,18 @@ check_packages jq wget ca-certificates bash-completion;
 
 echo "Installing sccache...";
 
-if [ $SCCACHE_VERSION == latest ]; then
-    find_version_from_git_tags SCCACHE_VERSION https://github.com/mozilla/sccache;
+if test "$SCCACHE_VERSION" = latest; then
+    find_version_from_git_tags SCCACHE_VERSION "https://github.com/$SCCACHE_REPOSITORY";
 fi
 
 # Install sccache
-wget --no-hsts -q -O- "https://github.com/mozilla/sccache/releases/download/v$SCCACHE_VERSION/sccache-v$SCCACHE_VERSION-$(uname -p)-unknown-linux-musl.tar.gz" \
-    | tar -C /usr/bin -zf - --wildcards --strip-components=1 -x */sccache \
- && chmod +x /usr/bin/sccache;
+wget --no-hsts -q -O- \
+    "https://github.com/$SCCACHE_REPOSITORY/releases/download/v$SCCACHE_VERSION/sccache-v$SCCACHE_VERSION-$(uname -m)-unknown-linux-musl.tar.gz" \
+  | tar -C /usr/bin -zf - --wildcards --strip-components=1 -x '*/sccache';
+
+mkdir -m 0777 -p /var/log/devcontainer-utils;
+touch /var/log/devcontainer-utils/sccache.log;
+chmod 0777 /var/log/devcontainer-utils/sccache.log;
 
 # export envvars in /etc/bash.bashrc
 append_to_etc_bashrc "$(cat .bashrc)";