Update to cranelift's formatting and testing scripts.

.gitignore

@@ -1,9 +1,10 @@
 *.pyc
-**/*.rs.bk
+*.bk
 *.swp
 *.swo
+*.swx
 tags
-/target/
+target
 Cargo.lock
 .*.rustfmt
 cretonne.dbg*

.travis.yml

@@ -1,18 +1,37 @@
+# Travis CI script. See https://travis-ci.org/ for more info.
+
 language: rust
 rust:
     - stable
+    # The version of rust in the latest Ubuntu LTS, currently Bionic.
+    - 1.25.0
     - beta
+    - nightly
+matrix:
+    allow_failures:
+        # We try to be compatible with beta and nightly, but they occasionally
+        # fail, so we don't allow them to hold up people using stable.
+        - rust: beta
+        - rust: nightly
 dist: trusty
 sudo: false
-addons:
-    apt:
-        packages:
-            - python3-pip
-install:
-    - pip3 install --user --upgrade mypy flake8
-    - travis_wait ./check-rustfmt.sh --install
+before_script:
+    # If an old version of rustfmt from cargo is already installed, uninstall
+    # it, since it can prevent the installation of the new version from rustup.
+    - cargo uninstall rustfmt || true
+    - cargo install --list
+    # If we're testing beta or nightly, we still need to install the stable
+    # toolchain so that we can run the stable version of rustfmt.
+    - rustup toolchain install stable
+    # Install the stable version of rustfmt.
+    - rustup component add --toolchain=stable rustfmt-preview
+    - rustup component list --toolchain=stable
+    - rustup show
+    - rustfmt +stable --version || echo fail
+    # Sometimes the component isn't actually ready after being installed, and
+    # rustup update makes it ready.
+    - rustup update
+    - rustfmt +stable --version
 script: ./test-all.sh
 cache:
     cargo: true
-    directories:
-        - $HOME/.cache/pip

check-clippy.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+set -euo pipefail
+
+# Usage: check-clippy.sh
+
+if cargo install --list | tee /dev/null | grep -q "^clippy v0"; then
+    exit 0
+else
+    exit 1
+fi

clippy-all.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+set -euo pipefail
+
+# Check all sources with clippy.
+# In the clif-util crate (root dir) clippy will only work with nightly cargo -
+# there is a bug where it will reject the commands passed to it by cargo 0.25.0
+exec cargo +nightly clippy --all

clippy.toml

@@ -0,0 +1 @@
+doc-valid-idents = [ "WebAssembly", "NaN" ]

format-all.sh

@@ -1,17 +1,12 @@
 #!/bin/bash
+set -euo pipefail
 
 # Format all sources using rustfmt.
 
-# Exit immediately on errors.
-set -e
-
-cd $(dirname "$0")
-src=$(pwd)
+topdir=$(dirname "$0")
+cd "$topdir"
 
 # Make sure we can find rustfmt.
 export PATH="$PATH:$HOME/.cargo/bin"
 
-for crate in $(find "$src" -name Cargo.toml); do
-    cd $(dirname "$crate")
-    cargo fmt -- "$@"
-done
+exec cargo +stable fmt --all -- "$@"

test-all.sh

@@ -0,0 +1,86 @@
+#!/bin/bash
+set -euo pipefail
+
+# This is the top-level test script:
+#
+# - Check code formatting.
+# - Make a debug build.
+# - Make a release build.
+# - Run unit tests for all Rust crates (including the filetests)
+# - Build API documentation.
+# - Optionally, run clippy and fuzzing.
+#
+# All tests run by this script should be passing at all times.
+
+# Disable generation of .pyc files because they cause trouble for vendoring
+# scripts, and this is a build step that isn't run very often anyway.
+export PYTHONDONTWRITEBYTECODE=1
+
+# Repository top-level directory.
+topdir=$(dirname "$0")
+cd "$topdir"
+
+function banner {
+    echo "======  $*  ======"
+}
+
+# Run rustfmt if we have it.
+banner "Rust formatting"
+if type rustfmt > /dev/null; then
+    # In newer versions of rustfmt, replace --write-mode=diff with --check.
+    if ! "$topdir/format-all.sh" --write-mode=diff ; then
+        echo "Formatting diffs detected! Run \"cargo fmt --all\" to correct."
+        exit 1
+    fi
+else
+    echo "rustfmt not available; formatting not checked!"
+    echo
+    echo "If you are using rustup, rustfmt can be installed via"
+    echo "\"rustup component add --toolchain=stable rustfmt-preview\", or see"
+    echo "https://github.com/rust-lang-nursery/rustfmt for more information."
+fi
+
+# Make sure the code builds in release mode.
+banner "Rust release build"
+cargo build --release
+
+# Make sure the code builds in debug mode.
+banner "Rust debug build"
+cargo build
+
+# Run the tests. We run these in debug mode so that assertions are enabled.
+banner "Rust unit tests"
+cargo test --all
+
+# Make sure the documentation builds.
+banner "Rust documentation: $topdir/target/doc/wasmtime/index.html"
+cargo doc
+
+# Run clippy if we have it.
+banner "Rust linter"
+if "$topdir/check-clippy.sh"; then
+    "$topdir/clippy-all.sh" --write-mode=diff
+else
+    echo "\`cargo +nightly install clippy\` for optional rust linting"
+fi
+
+# Ensure fuzzer works by running it with a single input
+# Note LSAN is disabled due to https://github.com/google/sanitizers/issues/764
+banner "cargo fuzz check"
+if rustup toolchain list | grep -q nightly; then
+    if cargo install --list | grep -q cargo-fuzz; then
+        echo "cargo-fuzz found"
+    else
+        echo "installing cargo-fuzz"
+        cargo +nightly install cargo-fuzz
+    fi
+
+    fuzz_module="ffaefab69523eb11935a9b420d58826c8ea65c4c"
+    ASAN_OPTIONS=detect_leaks=0 \
+    cargo +nightly fuzz run fuzz_translate_module \
+        "$topdir/fuzz/corpus/fuzz_translate_module/$fuzz_module"
+else
+    echo "nightly toolchain not found, skipping fuzz target integration test"
+fi
+
+banner "OK"