chore(licenses): Add CI job when cargo.toml or lock file changes

.github/workflows/license-check.yaml

@@ -0,0 +1,14 @@
+name: CI
+on:
+  pull_request:
+    paths:
+      - '**/Cargo.lock'
+      - '**/Cargo.toml'
+jobs:
+  cargo-deny:
+    runs-on: ubuntu-22.04
+    steps:
+    - uses: actions/checkout@v3
+    - uses: EmbarkStudios/cargo-deny-action@v1
+      with:
+        command: check bans licenses sources

deny.toml

@@ -0,0 +1,93 @@
+# This section is considered when running `cargo deny check advisories`
+# More documentation for the advisories section can be found here:
+# https://embarkstudios.github.io/cargo-deny/checks/advisories/cfg.html
+[advisories]
+vulnerability = "deny"
+unmaintained = "warn"
+unsound = "warn"
+yanked = "warn"
+notice = "warn"
+
+# This section is considered when running `cargo deny check bans`.
+# More documentation about the 'bans' section can be found here:
+# https://embarkstudios.github.io/cargo-deny/checks/bans/cfg.html
+[bans]
+# Lint level for when multiple versions of the same crate are detected
+multiple-versions = "warn"
+# Lint level for when a crate version requirement is `*`
+wildcards = "warn"
+highlight = "all"
+# List of crates to deny
+deny = [
+    # Each entry the name of a crate and a version range. If version is
+    # not specified, all versions will be matched.
+    #{ name = "ansi_term", version = "=0.11.0" },
+]
+# Certain crates/versions that will be skipped when doing duplicate detection.
+skip = []
+# Similarly to `skip` allows you to skip certain crates during duplicate
+# detection. Unlike skip, it also includes the entire tree of transitive
+# dependencies starting at the specified crate, up to a certain depth, which is
+# by default infinite
+skip-tree = []
+
+[licenses]
+unlicensed = "deny"
+confidence-threshold = 0.9
+# copyleft = "deny"
+
+# List of explicitly allowed licenses
+# See https://spdx.org/licenses/ for list of possible licenses
+# [possible values: any SPDX 3.7 short identifier (+ optional exception)].
+allow = [
+    "MIT",
+    "MIT-0",
+    "Apache-2.0",
+    "Apache-2.0 WITH LLVM-exception",
+    "BSD-2-Clause",
+    "BSD-3-Clause",
+    "ISC",
+    "Unicode-DFS-2016",
+    "Unlicense",
+    "MPL-2.0",
+    "Zlib",
+    # https://github.com/briansmith/ring/issues/902
+    "LicenseRef-ring",
+    # https://github.com/briansmith/webpki/issues/148
+    "LicenseRef-webpki",
+]
+
+# Allow 1 or more licenses on a per-crate basis, so that particular licenses
+# aren't accepted for every possible crate as with the normal allow list
+exceptions = [
+    # CC0 is a permissive license but somewhat unclear status for source code
+    # so we prefer to not have dependencies using it
+    # https://tldrlegal.com/license/creative-commons-cc0-1.0-universal
+    { allow = ["CC0-1.0"], name = "tiny-keccak" },
+]
+
+[[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 }]
+
+# This section is considered when running `cargo deny check sources`.
+# More documentation about the 'sources' section can be found here:
+# https://embarkstudios.github.io/cargo-deny/checks/sources/cfg.html
+[sources]
+# Lint level for what to happen when a crate from a crate registry that is not
+# in the allow list is encountered
+unknown-registry = "deny"
+# Lint level for what to happen when a crate from a git repository that is not
+# in the allow list is encountered
+unknown-git = "deny"