Build fuzz targets on CI.

Author: kinetiknz

.travis.yml

@@ -16,15 +16,30 @@ env:
 install:
   # rustfmt may not always be available in nightly
   - if [[ "$TRAVIS_RUST_VERSION" != *nightly* ]]; then rustup component add rustfmt; fi
-  - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then T=x86_64-pc-windows-msvc; rustup target add $T; TARGET=--target=$T; fi
+  # cargo-fuzz supports x86-64 Linux and x86-64 macOS, but macOS currently fails, see:
+  # https://github.com/mozilla/mp4parse-rust/pull/210#issuecomment-597420191
+  - if [[ "$TRAVIS_RUST_VERSION" == *nightly* ]] && [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
+      cargo install cargo-fuzz;
+    fi
+  - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
+      TARGET=x86_64-pc-windows-msvc;
+      rustup target add $TARGET;
+    fi
 
 script:
   # We cannot run `cargo test` with the mp4parse_fallible feature enabled
   # (see comment where the feature is defined in mp4parse_capi/Cargo.toml),
   # but we can at least check for changes behind features that would break the
   # build.
   - cargo check --all --verbose $RELEASE --tests --all-features
-  - cargo test --all --verbose $RELEASE $TARGET
+  - cargo test --all --verbose $RELEASE ${TARGET:+--target=$TARGET}
   - cargo doc --package mp4parse_capi
   # The `false` after `echo` is necessary to avoid false negatives due to `echo` returning success
-  - if [[ "$TRAVIS_RUST_VERSION" != *nightly* ]]; then cargo fmt -- --check || (echo "Please reformat your code with 'cargo fmt' (version $(cargo fmt -- --version))"; false); fi
+  - if [[ "$TRAVIS_RUST_VERSION" != *nightly* ]]; then
+      cargo fmt -- --check || (echo "Please reformat your code with 'cargo fmt' (version $(cargo fmt -- --version))"; false);
+    fi
+  - if [[ "$TRAVIS_RUST_VERSION" == nightly ]] && [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
+      cd mp4parse_capi;
+      cargo fuzz build;
+    fi
+