Check dependency licenses in CIs

.gitattributes

@@ -1,3 +1,4 @@
+*.awk	text	diff=awk
 *.md	text	diff=markdown
 *.png	binary	diff=png	-filter
 *.rs	text	diff=rust	filter=rustfmt

.github/license-acceptable.awk

@@ -0,0 +1,18 @@
+BEGIN {FS="\t"}
+{
+  isAcceptable=0
+  split($5, licenseOptions, " OR ")
+  for (i in licenseOptions) {
+    isAcceptable = isAcceptable ||
+      licenseOptions[i] == "Apache-2.0" ||
+      licenseOptions[i] == "BSD-3-Clause" ||
+      licenseOptions[i] == "MIT" ||
+      licenseOptions[i] == "license"
+      # "license" is the value of the header of this TSV column
+  }
+  if (! isAcceptable) {
+    print($1)
+    print($5)
+    exit 3
+  }
+}

.github/workflows/build.yml

@@ -75,3 +75,25 @@ jobs:
            cargo-ubuntu-
      - name: cargo clippy
        run: cargo clippy --all-targets --all-features -- -D warnings
+  check_licenses:
+    runs-on: ubuntu-latest
+    steps:
+     - uses: actions/checkout@v4
+     - name: Cache cargo registry
+       uses: actions/cache@v4
+       with:
+         path: |
+           ~/.cargo/registry/
+           ~/.cargo/bin/cargo-license
+           ~/.cargo/.crates.toml
+           ~/.cargo/.crates2.json
+         key: cargo-license-${{ hashFiles('**/Cargo.lock') }}
+         restore-keys: |
+           cargo-license-
+           cargo-ubuntu-
+     - name: Install cargo-license
+       run: 'cargo install cargo-license'
+     - name: Check licenses
+       run: >
+         cargo license --tsv |
+         awk -f .github/license-acceptable.awk

appveyor.yml

@@ -33,6 +33,7 @@ install:
     ./rustup.sh -y --default-toolchain $CHANNEL --default-host $TARGET
     source $HOME/.cargo/env
 - ps: '& cargo -V'
+- ps: '& cargo install -q cargo-license'
 
 build_script:
 - cmd: 'cargo build %MODE%'
@@ -47,6 +48,8 @@ test_script:
 
 - ps: 'cargo fmt --all -- --check'
 
+- ps: 'cargo license --tsv | awk -f .github/license-acceptable.awk'
+
 - ps: './target/release/png_inflate --version'
 artifacts:
 - path: target\release\png_inflate.exe.gz

lib/png_inflate_derive/Cargo.toml

@@ -6,6 +6,7 @@ authors = [
 ]
 edition = "2021"
 publish = false
+license = "Apache-2.0"
 
 [lib]
 proc-macro = true