Allow running travis build locally

travis.sh

@@ -1,24 +1,70 @@
 #!/bin/bash
-set -ev
-if [ "${CLIPPY}" = "true" ]; then
-    if cargo install clippy -f; then
-        (cd serde && cargo clippy --features unstable-testing -- -Dclippy)
-        (cd serde_derive && cargo clippy --features unstable-testing -- -Dclippy)
-        (cd test_suite && cargo clippy --features unstable-testing -- -Dclippy)
-        (cd test_suite/deps && cargo clippy -- -Dclippy)
-        (cd test_suite/no_std && cargo clippy -- -Dclippy)
+
+set -e
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+channel() {
+    if [ -n "${TRAVIS}" ]; then
+        if [ "${TRAVIS_RUST_VERSION}" = "${CHANNEL}" ]; then
+            pwd
+            (set -x; cargo "$@")
+        fi
     else
-        echo "could not compile clippy, ignoring clippy tests"
+        pwd
+        (set -x; cargo "+${CHANNEL}" "$@")
     fi
+}
+
+if [ -n "${CLIPPY}" ]; then
+    if [ -n "${TRAVIS}" ]; then
+        # cached installation will not work on a later nightly
+        cargo install clippy --force
+    fi
+
+    cd "$DIR/serde"
+    cargo clippy --features unstable-testing -- -Dclippy
+
+    cd "$DIR/serde_derive"
+    cargo clippy --features unstable-testing -- -Dclippy
+
+    cd "$DIR/test_suite"
+    cargo clippy --features unstable-testing -- -Dclippy
+
+    cd "$DIR/test_suite/no_std"
+    cargo clippy -- -Dclippy
 else
-    (cd serde && travis-cargo build)
-    (cd serde && travis-cargo --only beta test)
-    (cd serde && travis-cargo --only nightly test -- --features unstable-testing)
-    (cd serde && travis-cargo build -- --no-default-features)
-    (cd serde && travis-cargo --only nightly build -- --no-default-features --features alloc)
-    (cd serde && travis-cargo --only nightly build -- --no-default-features --features collections)
-    (cd test_suite && travis-cargo --only beta test)
-    (cd test_suite/deps && travis-cargo --only nightly build)
-    (cd test_suite travis-cargo --only nightly test -- --features unstable-testing)
-    (cd test_suite/no_std && travis-cargo --only nightly build)
-fi
+    CHANNEL=nightly
+    cargo clean
+    cd "$DIR/serde"
+    channel build
+    channel build --no-default-features
+    channel build --no-default-features --features alloc
+    channel build --no-default-features --features collections
+    channel test --features unstable-testing
+    cd "$DIR/test_suite/deps"
+    channel build
+    cd "$DIR/test_suite"
+    channel test --features unstable-testing
+    cd "$DIR/test_suite/no_std"
+    channel build
+
+    CHANNEL=beta
+    cargo clean
+    cd "$DIR/serde"
+    channel build
+    cd "$DIR/test_suite"
+    channel test
+
+    CHANNEL=stable
+    cargo clean
+    cd "$DIR/serde"
+    channel build
+    channel build --no-default-features
+
+    CHANNEL=1.13.0
+    cargo clean
+    cd "$DIR/serde"
+    channel build
+    channel build --no-default-features
+fi