Check variable input before adding to GITHUB_ENV

This ensures `.nightly-version` is well defined, along with `brew --prefix`
(our only other instance of variable environment variables).

Author: kayabaNerve

.github/actions/build-dependencies/action.yml

@@ -46,6 +46,7 @@ runs:
         elif [ "$RUNNER_OS" == "macOS" ]; then
           brew install protobuf llvm
           HOMEBREW_PREFIX=$(brew --prefix)
+          [ -d "$HOMEBREW_PREFIX" ]
           ls $HOMEBREW_PREFIX/opt/llvm/lib | grep "libclang.dylib" # Make sure this installed `libclang`
           echo "DYLD_LIBRARY_PATH=$HOMEBREW_PREFIX/opt/llvm/lib:$DYLD_LIBRARY_PATH" >> "$GITHUB_ENV"
         fi

.github/nightly-version

@@ -1 +1 @@
-nightly-2026-04-01
+2026-04-01

.github/workflows/lint.yml

@@ -25,7 +25,10 @@ jobs:
       - name: Get nightly version to use
         id: nightly
         shell: bash
-        run: echo "NIGHTLY_VERSION=$(cat .github/nightly-version)" >> "$GITHUB_ENV"
+        run: |
+          # Ensure `nightly-version` only contains numbers and dashes
+          [ $(grep -v "^[0-9-]*$" .github/nightly-version | wc -l || true) -eq 0 ]
+          echo "NIGHTLY_VERSION=nightly-$(cat .github/nightly-version)" >> "$GITHUB_ENV"
 
       - name: Build Dependencies
         uses: ./.github/actions/build-dependencies
@@ -93,7 +96,10 @@ jobs:
       - name: Get nightly version to use
         id: nightly
         shell: bash
-        run: echo "NIGHTLY_VERSION=$(cat .github/nightly-version)" >> "$GITHUB_ENV"
+        run: |
+          # Ensure `nightly-version` only contains numbers and dashes
+          [ $(grep -v "^[0-9-]*$" .github/nightly-version | wc -l || true) -eq 0 ]
+          echo "NIGHTLY_VERSION=nightly-$(cat .github/nightly-version)" >> "$GITHUB_ENV"
 
       - name: Build Dependencies
         uses: ./.github/actions/build-dependencies
@@ -135,7 +141,10 @@ jobs:
       - name: Get nightly version to use
         id: nightly
         shell: bash
-        run: echo "NIGHTLY_VERSION=$(cat .github/nightly-version)" >> "$GITHUB_ENV"
+        run: |
+          # Ensure `nightly-version` only contains numbers and dashes
+          [ $(grep -v "^[0-9-]*$" .github/nightly-version | wc -l || true) -eq 0 ]
+          echo "NIGHTLY_VERSION=nightly-$(cat .github/nightly-version)" >> "$GITHUB_ENV"
 
       - name: Install nightly rust
         shell: bash

.github/workflows/monthly-nightly-update.yml

@@ -18,7 +18,7 @@ jobs:
 
       - name: Write nightly version
         shell: bash
-        run: echo $(date +"nightly-%Y-%m"-01) > .github/nightly-version
+        run: echo $(date +"%Y-%m"-01) > .github/nightly-version
 
       - name: Create the commit
         shell: bash

.github/workflows/no-std.yml

@@ -40,7 +40,10 @@ jobs:
       - name: Get nightly version to use
         id: nightly
         shell: bash
-        run: echo "NIGHTLY_VERSION=$(cat .github/nightly-version)" >> "$GITHUB_ENV"
+        run: |
+          # Ensure `nightly-version` only contains numbers and dashes
+          [ $(grep -v "^[0-9-]*$" .github/nightly-version | wc -l || true) -eq 0 ]
+          echo "NIGHTLY_VERSION=nightly-$(cat .github/nightly-version)" >> "$GITHUB_ENV"
 
       - name: Install RISC-V Toolchain
         shell: bash

.github/workflows/pages.yml

@@ -57,6 +57,7 @@ jobs:
           bundler-cache: true
           cache-version: 0
           working-directory: "${{ github.workspace }}/docs"
+
       - name: Setup Pages
         id: pages
         uses: actions/configure-pages@983d7736d9b0ae728b81ab479565c72886d7745b # 5.0.0
@@ -70,9 +71,14 @@ jobs:
       - name: Get nightly version to use
         id: nightly
         shell: bash
-        run: echo "NIGHTLY_VERSION=$(cat .github/nightly-version)" >> "$GITHUB_ENV"
+        run: |
+          # Ensure `nightly-version` only contains numbers and dashes
+          [ $(grep -v "^[0-9-]*$" .github/nightly-version | wc -l || true) -eq 0 ]
+          echo "NIGHTLY_VERSION=nightly-$(cat .github/nightly-version)" >> "$GITHUB_ENV"
+
       - name: Build Dependencies
         uses: ./.github/actions/build-dependencies
+
       - name: Buld Rust docs
         shell: bash
         run: |