ci: `cd` into crate instead of `-p $crate` (#176)

Cargo is buggy when specifying the crate to run a command against.

ci/azure-install-rust.yml

@@ -1,26 +1,28 @@
 steps:
-  - ${{ if not(startsWith(parameters.platform, 'Windows')) }}:
-    # Linux and macOS.
-    - script: |
-        set -e
-        curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain $RUSTUP_TOOLCHAIN
-        echo "##vso[task.setvariable variable=PATH;]$PATH:$HOME/.cargo/bin"
-      env:
-        RUSTUP_TOOLCHAIN: ${{parameters.rust_version}}
-      displayName: Install rust
-  - ${{ if startsWith(parameters.platform, 'Windows') }}:
-    # Windows.
-    - script: |
-        echo "windows"
-        curl -sSf -o rustup-init.exe https://win.rustup.rs
-        rustup-init.exe -y --default-toolchain %RUSTUP_TOOLCHAIN%
-        set PATH=%PATH%;%USERPROFILE%\.cargo\bin
-        echo "##vso[task.setvariable variable=PATH;]%PATH%;%USERPROFILE%\.cargo\bin"
-      env:
-        RUSTUP_TOOLCHAIN: ${{parameters.rust_version}}
-      displayName: Install rust (windows)
+  # Linux and macOS.
+  - script: |
+      set -e
+      curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain $RUSTUP_TOOLCHAIN
+      echo "##vso[task.setvariable variable=PATH;]$PATH:$HOME/.cargo/bin"
+    env:
+      RUSTUP_TOOLCHAIN: ${{parameters.rust_version}}
+    displayName: "Install rust (*nix)"
+    condition: not(eq(variables['Agent.OS'], 'Windows_NT'))
+
+  # Windows.
+  - script: |
+      echo "windows"
+      curl -sSf -o rustup-init.exe https://win.rustup.rs
+      rustup-init.exe -y --default-toolchain %RUSTUP_TOOLCHAIN%
+      set PATH=%PATH%;%USERPROFILE%\.cargo\bin
+      echo "##vso[task.setvariable variable=PATH;]%PATH%;%USERPROFILE%\.cargo\bin"
+    env:
+      RUSTUP_TOOLCHAIN: ${{parameters.rust_version}}
+    displayName: Install rust (windows)
+    condition: eq(variables['Agent.OS'], 'Windows_NT')
+
   # All platforms.
-  - bash: |
+  - script: |
         rustc -Vv
         cargo -V
     displayName: Query rust and cargo versions

ci/azure-rustfmt.yml

@@ -7,9 +7,7 @@ jobs:
   steps:
     - template: azure-install-rust.yml
       parameters:
-        platform: Linux
-        # Pin the version of Rust in case rustfmt changes.
-        rust_version: 1.32.0
+        rust_version: stable
     - bash: |
         rustup component add rustfmt
       displayName: Install rustfmt

ci/azure-test-stable.yml

@@ -9,9 +9,9 @@ jobs:
   steps:
   - template: azure-install-rust.yml
     parameters:
-      platform: ${{parameters.name}}
       rust_version: stable
 
   - ${{ each crate in parameters.crates }}:
-    - script: cargo test -p tower-${{ crate }}
+    - script: cargo test
       displayName: cargo test -p tower-${{ crate }}
+      workingDirectory: $(Build.SourcesDirectory)/tower-${{ crate }}