feat: allow selecting the nightly toolchain

Dockerfile

@@ -13,8 +13,6 @@ RUN apt-get update \
   --no-install-recommends \
   nodejs=18.19.0+dfsg-6~deb12u2 \
   curl=7.88.1-10+deb12u7 \
-  clang-16=1:16.0.6-15~deb12u1 \
-  mold=1.10.1+dfsg-1 \
   pkg-config=1.8.1-1 \
   libssl-dev=3.0.14-1~deb12u2 \
   libdbus-1-dev=1.14.10-1~deb12u1 \

README.md

@@ -14,32 +14,30 @@ jobs:
     steps:
       - uses: https://git.kemitix.net/kemitix/rust@v1.80.0
         with:
-          args: test
+          args: nightly cargo test
       - uses: https://git.kemitix.net/kemitix/rust@v1.80.0
         with:
-          args: build
+          args: v1.79.0 cargo build
 ```
 
+The `args` is one of the following:
+
+- <COMMAND>
+- [ [nightly | stable | v1.xx.x] ] <COMMAND>
+
+`COMMAND` is the command you want to run. The optional prefix is the Rust toolchain, or version. Allowed values are `nightly`, `stable` or a Rust version.
+
+Where the optional prefix is not given, the `stable` toolchain will be used.
+
+
 ## Contents
 
 - nodejs
-- clang-16
-- mold
 - rust
 - git
 - cargo
 - cargo-binstall
 
-## Linking
-
-To take advantage of the clang and mold packages, add the following to the `.cargo/config.toml` file in your project.
-
-```toml
-[target.x86_64-unknown-linux-gnu]
-linker = "/usr/bin/clang-16"
-rustflags = ["-C", "link-arg=--ld-path=/usr/bin/mold"]
-```
-
 ## Binary size
 
 To reduce the size of the debug binary, add the following to the `.cargo/config.toml` file in you project.

entrypoint.sh

@@ -2,5 +2,46 @@
 
 set -e
 
-rustup update
+echo "INPUT_ARGS: ${INPUT_ARGS}"
-${INPUT_ARGS}
+
+# split input into an array
+read -ra ARGS <<<"${INPUT_ARGS}"
+
+# default toolchain
+TOOLCHAIN="stable"
+echo "Default toolchain: ${TOOLCHAIN}"
+
+# if first parameter is 'nightly'...
+if test "${ARGS[0]}" == "nightly"; then
+  TOOLCHAIN="nightly"
+  ARGS=("${ARGS[@]:1}")
+fi
+if test "${ARGS[0]}" == "stable"; then
+  TOOLCHAIN="stable" # redundant as this is the default
+  ARGS=("${ARGS[@]:1}")
+fi
+if [[ "${ARGS[0]}" == v1* ]]; then
+  TOOLCHAIN="${ARGS[0]:1}"
+  ARGS=("${ARGS[@]:1}")
+fi
+echo "Selected toolchain: ${TOOLCHAIN}"
+
+rustup update "${TOOLCHAIN}"
+
+if test "${ARGS[0]}" == "cargo";then
+  PRE_COMMAND="cargo +${TOOLCHAIN} "
+else
+  PRE_COMMAND="${ARGS[0]}"
+fi
+ARGS=("${ARGS[@]:1}")
+
+# ensure toolchain is up-to-date
+# recombine remaining arguments
+COMMAND=$(
+  IFS=" "
+  echo "${ARGS[*]}"
+)
+
+# execute command
+echo "${PRE_COMMAND} ${COMMAND}"
+${PRE_COMMAND} ${COMMAND}