validate/toml: switch to github.com/pelletier/go-toml

The github.com/BurntSushi/toml project is no longer maintained,
and containerd is switching to this project instead, so start
moving our code as well.

This patch only changes the binary used during validation (tbh,
we could probably remove this validation step, but leaving that
for now).

I manually verified that the hack/verify/toml still works by adding a commit
that makes the MAINTAINERS file invalid;

        diff --git a/MAINTAINERS b/MAINTAINERS
        index b739e7e20c..81ababd8de 100644
        --- a/MAINTAINERS
        +++ b/MAINTAINERS
        @@ -23,7 +23,7 @@
                # a subsystem, they are responsible for doing so and holding the
                # subsystem maintainers accountable. If ownership is unclear, they are the de facto owners.

        -               people = [
        +               people =
                                "akihirosuda",
                                "anusha",
                                "coolljt0725",

Running `hack/verify/toml` was able to detect the broken format;

        hack/validate/toml
        (27, 4): keys cannot contain , characterThese files are not valid TOML:
         - MAINTAINERS

        Please reformat the above files as valid TOML

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Dockerfile

@@ -151,12 +151,12 @@ RUN --mount=type=cache,sharing=locked,id=moby-cross-true-aptlib,target=/var/lib/
 
 FROM runtime-dev-cross-${CROSS} AS runtime-dev
 
-FROM base AS tomlv
+FROM base AS tomll
-ARG TOMLV_COMMIT
+ARG GOTOML_VERSION
 RUN --mount=type=cache,target=/root/.cache/go-build \
     --mount=type=cache,target=/go/pkg/mod \
-    --mount=type=bind,src=hack/dockerfile/install,target=/tmp/install \
+    --mount=type=bind,src=hack/dockerfile/install/tomll.installer,target=/tmp/install/tomll.installer \
-        PREFIX=/build /tmp/install/install.sh tomlv
+        . /tmp/install/tomll.installer && PREFIX=/build install_tomll
 
 FROM base AS vndr
 ARG VNDR_COMMIT
@@ -305,7 +305,7 @@ RUN pip3 install yamllint==1.16.0
 COPY --from=dockercli     /build/ /usr/local/cli
 COPY --from=frozen-images /build/ /docker-frozen-images
 COPY --from=swagger       /build/ /usr/local/bin/
-COPY --from=tomlv         /build/ /usr/local/bin/
+COPY --from=tomll         /build/ /usr/local/bin/
 COPY --from=tini          /build/ /usr/local/bin/
 COPY --from=registry      /build/ /usr/local/bin/
 COPY --from=criu          /build/ /usr/local/

hack/dockerfile/install/tomll.installer

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+: "${GOTOML_VERSION:=v1.8.1}"
+
+install_tomll() {
+	echo "Install go-toml version ${GOTOML_VERSION}"
+	# TODO remove GO111MODULE=on and change to 'go install -mod=mod ...' once we're at go 1.16+
+	GO111MODULE=on GOBIN="${PREFIX}" go get -v "github.com/pelletier/go-toml/cmd/tomll@${GOTOML_VERSION}"
+}

hack/dockerfile/install/tomlv.installer

@@ -1,12 +0,0 @@
-#!/bin/sh
-
-# When updating TOMLV_COMMIT, consider updating github.com/BurntSushi/toml
-# in vendor.conf accordingly
-: ${TOMLV_COMMIT:=3012a1dbe2e4bd1391d42b32f0577cb7bbc7f005} # v0.3.1
-
-install_tomlv() {
-	echo "Install tomlv version $TOMLV_COMMIT"
-	git clone https://github.com/BurntSushi/toml.git "$GOPATH/src/github.com/BurntSushi/toml"
-	cd "$GOPATH/src/github.com/BurntSushi/toml" && git checkout -q "$TOMLV_COMMIT"
-	go build -v ${GO_BUILDMODE} -o "${PREFIX}/tomlv" "github.com/BurntSushi/toml/cmd/tomlv"
-}

hack/validate/toml

@@ -10,7 +10,7 @@ unset IFS
 badFiles=()
 for f in "${files[@]}"; do
 	# we use "git show" here to validate that what's committed has valid TOML syntax
-	if ! git show "$VALIDATE_HEAD:$f" | tomlv /proc/self/fd/0; then
+	if ! git show "$VALIDATE_HEAD:$f" | tomll /proc/self/fd/0; then
 		badFiles+=("$f")
 	fi
 done

vendor.conf

@@ -63,7 +63,6 @@ github.com/vishvananda/netns                        db3c7e526aae966c4ccfa6c8189b
 github.com/vishvananda/netlink                      f049be6f391489d3f374498fe0c8df8449258372 # v1.1.0
 github.com/moby/ipvs                                4566ccea0e08d68e9614c3e7a64a23b850c4bb35 # v1.0.1
 
-# When updating, consider updating TOMLV_COMMIT in hack/dockerfile/install/tomlv.installer accordingly
 github.com/BurntSushi/toml                          3012a1dbe2e4bd1391d42b32f0577cb7bbc7f005 # v0.3.1
 github.com/samuel/go-zookeeper                      d0e0d8e11f318e000a8cc434616d69e329edc374
 github.com/deckarep/golang-set                      ef32fa3046d9f249d399f98ebaf9be944430fd1d