Add code checks to CI and do_checks script

.github/workflows/code_checks.yml

@@ -0,0 +1,82 @@
+name: Static code checks
+
+on:
+  push:
+    branches:
+      - "**" # target all branches
+  pull_request:
+    branches:
+      - master
+
+env:
+  CARGO_TERM_COLOR: always
+  RUST_LOG: debug
+  RUST_BACKTRACE: full
+
+jobs:
+  static_checks_ubuntu:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository and submodules
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: Update local dependency repositories
+        run: sudo apt-get update
+      - name: Install dependencies
+        run: sudo apt-get install -yqq --no-install-recommends build-essential python3 python3-toml
+
+      - name: Install rust
+        run: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain $(python3 ./build-tools/rust-version-extractor/rust-version-extractor.py)
+      - name: Install rust clippy
+        run: rustup component add clippy
+      - name: Install cargo-deny
+        run: cargo install cargo-deny --locked
+      - name: Run checks
+        run: ./do_checks.sh
+
+  static_checks_windows:
+    runs-on: windows-latest
+    steps:
+      # This prevents git from changing line-endings to crlf, which messes cargo fmt checks
+      - name: Set git to use LF
+        run: |
+          git config --global core.autocrlf false
+          git config --global core.eol lf
+
+      - name: Checkout repository and submodules
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: Install python toml package
+        run: python3 -m pip install toml
+      - name: Install rust
+        run: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain $(python3 ./build-tools/rust-version-extractor/rust-version-extractor.py)
+      - name: Install rust clippy
+        run: rustup component add clippy
+      - name: Install cargo-deny
+        run: cargo install cargo-deny --locked
+      - name: Run checks
+        shell: bash
+        run: ./do_checks.sh
+
+  static_checks_macos:
+    runs-on: macos-latest
+    steps:
+      - name: Checkout repository and submodules
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: Install python toml package
+        run: python3 -m pip install toml
+      - name: Install rust
+        run: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain $(python3 ./build-tools/rust-version-extractor/rust-version-extractor.py)
+      - name: Install rust clippy
+        run: rustup component add clippy
+      - name: Install cargo-deny
+        run: cargo install cargo-deny --locked
+      - name: Run checks
+        run: bash ./do_checks.sh

deny.toml

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+[sources.allow-org]
+github = [
+    "mintlayer", # allow any code from mintlayer's github
+]
+
+[licenses]
+#we reject code without a license
+confidence-threshold = 0.92
+allow = [
+    "Apache-2.0",
+    "MIT",
+    "Unicode-DFS-2016",
+] # deny a license not in this set of licenses
+
+[[licenses.clarify]]
+name = "ring"
+expression = "LicenseRef-ring"
+license-files = [
+    { path = "LICENSE", hash = 0xbd0eed23 },
+]
+
+[[licenses.clarify]]
+name = "webpki"
+expression = "LicenseRef-webpki"
+license-files = [
+    { path = "LICENSE", hash = 0x001c7e6c },
+]
+
+[[licenses.clarify]]
+name = "rustls-webpki"
+expression = "LicenseRef-webpki"
+license-files = [
+    { path = "LICENSE", hash = 0x001c7e6c },
+]
+
+[advisories]
+db-path = "~/.cargo/advisory-dbs"
+db-urls = [ "https://github.com/RustSec/advisory-db" ]
+yanked = "warn"
+ignore = []

do_checks.sh

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+#!/bin/bash
+
+set -e
+
+SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
+PYTHON=$(which python || which python3)
+
+cargo fmt --check -- --config newline_style=Unix
+
+# Install cargo deny first with: cargo install cargo-deny
+cargo deny check --hide-inclusion-graph
+
+# Checks enabled everywhere, including tests, benchmarks
+cargo clippy