CI: download pre-built libraries by install action (#119)

* CI: download pre-built libraries by install action

This has the advantage that always the newest version is selected
without us having to update the version number. (And it looks less like
black magic.)

* CI: add toolchain selection where missing

* CI: use prebuilt wasm-pack

.github/workflows/rust.yml

@@ -34,6 +34,7 @@ jobs:
       - name: Install Rust
         run: |
           rustup toolchain install ${{ matrix.toolchain }} --profile minimal --no-self-update
+          rustup default ${{ matrix.toolchain }}
       - name: Update lockfile
         run: cargo generate-lockfile ${{ matrix.versions }}
         env:
@@ -62,6 +63,7 @@ jobs:
       - name: Install Rust
         run: |
           rustup toolchain install ${{ matrix.toolchain }} --profile minimal --no-self-update --target wasm32-unknown-unknown
+          rustup default ${{ matrix.toolchain }}
       - name: Update lockfile
         run: cargo generate-lockfile ${{ matrix.versions }}
         env:
@@ -85,15 +87,19 @@ jobs:
       - name: Install Rust
         run: |
           rustup toolchain install ${{ matrix.toolchain }} --profile minimal --no-self-update --target wasm32-unknown-unknown
+          rustup default ${{ matrix.toolchain }}
       - name: Install Node
         uses: actions/setup-node@v3
         with:
           node-version: 14
+      - name: Install "wasm-pack"
+        uses: taiki-e/install-action@v2
+        with:
+          tool: wasm-pack
       - name: Update lockfile
         run: cargo generate-lockfile ${{ matrix.versions }}
         env:
           RUSTC_BOOTSTRAP: 1
-      - run: which wasm-pack || cargo +stable install wasm-pack
       - run: wasm-pack test --node
 
   build-cross:
@@ -120,17 +126,10 @@ jobs:
         env:
           RUSTC_BOOTSTRAP: 1
 
-        # The command is derived from `cargo-quickinstall`'s description:
-        # https://github.com/cargo-bins/cargo-quickinstall/blob/49f09436/README.md#use-in-ci-systems
-        #
-        # I.e. download the file into STDOUT, follow redirects, don't give status reports, except
-        # if there are HTTP errors, and in case of HTTP errors don't pipe out anything at all.
-        # Extract everything into Cargo's `cargo install` destination, which is in your $PATH already.
-        #
-        # Updated pre-compiled binaries can be found in <https://github.com/cargo-bins/cargo-quickinstall/releases>
-        # by searching for their project name.
       - name: Install "cross"
-        run: curl --location --silent --show-error --fail https://github.com/cargo-bins/cargo-quickinstall/releases/download/cross-0.2.5-x86_64-unknown-linux-gnu/cross-0.2.5-x86_64-unknown-linux-gnu.tar.gz | tar -xzvvf - -C $HOME/.cargo/bin
+        uses: taiki-e/install-action@v2
+        with:
+          tool: cross
 
       - run: cross build --target ${{ matrix.target }} --examples
 
@@ -152,9 +151,10 @@ jobs:
           ndk-version: r25b
           local-cache: true
 
-        # See "build-cross" for an explanation
       - name: Install "cargo ndk"
-        run: curl --location --silent --show-error --fail https://github.com/cargo-bins/cargo-quickinstall/releases/download/cargo-ndk-3.2.1/cargo-ndk-3.2.1-x86_64-unknown-linux-gnu.tar.gz | tar -xzvvf - -C $HOME/.cargo/bin
+        uses: taiki-e/install-action@v2
+        with:
+          tool: cargo-ndk
 
       - name: Check
         run: cargo ndk check --lib
@@ -240,7 +240,8 @@ jobs:
       - name: Install Rust
         run: |
           rustup toolchain install nightly --profile minimal --no-self-update --component rust-src
-      - run: cargo +nightly check --target x86_64-unknown-haiku -Z build-std --examples
+          rustup default nightly
+      - run: cargo check --target x86_64-unknown-haiku -Z build-std --examples
 
   doc:
     runs-on: ubuntu-latest
@@ -339,7 +340,8 @@ jobs:
         uses: actions/checkout@v3
       - name: Install Rust
         run: |
-            rustup toolchain install ${{ matrix.toolchain }} --profile minimal --no-self-update --component clippy
+          rustup toolchain install ${{ matrix.toolchain }} --profile minimal --no-self-update --component clippy
+          rustup default ${{ matrix.toolchain }}
       - name: Update lockfile
         run: cargo generate-lockfile ${{ matrix.versions }}
         working-directory: haiku
@@ -355,8 +357,15 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+
       - name: Install Rust
         run: |
-          rustup toolchain install stable --profile minimal --no-self-update
-      - run: which cargo-hack || cargo +stable install cargo-hack
+          rustup toolchain install nightly --profile minimal --no-self-update
+          rustup default nightly
+
+      - name: Install "cargo hack"
+        uses: taiki-e/install-action@v2
+        with:
+          tool: cargo-hack
+
       - run: cargo hack check --version-range 1.36..