bazel: add docgen tool

Signed-off-by: Paul Meyer <49727155+katexochen@users.noreply.github.com>

hack/docgen-builder/build-and-upload.sh

@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+
+# Usage: ./build-and-upload.sh [dryrun]
+
+set -euo pipefail
+set -o errtrace
+shopt -s inherit_errexit
+
+talosRepo="https://github.com/siderolabs/talos"
+talosHash="94c24ca64e70f227da29cd02bd367d3c2701b96c"
+s3CASPath="s3://cdn-constellation-backend/constellation/cas/sha256"
+publicCASPath="https://cdn.confidential.cloud/constellation/cas/sha256"
+
+function cleanup {
+  echo "Cleaning up"
+  rm -rf "${tmpDir}"
+}
+
+trap cleanup EXIT
+
+# Set flags to --dryrun if arg 1 is "dryrun"
+awsFlags=()
+if [[ ${1-} == "dryrun" ]]; then
+  awsFlags+=("--dryrun")
+fi
+
+# Create a temp dir to work in
+tmpDir=$(mktemp -d)
+pushd "${tmpDir}"
+
+# Get the talos source code
+wget -qO- "${talosRepo}/archive/${talosHash}.tar.gz" | tar -xz
+cp -r "talos-${talosHash}/hack/docgen" .
+pushd "docgen"
+
+# Build and upload the talos-docgen binary
+echo
+for arch in "amd64" "arm64"; do
+  for os in "linux" "darwin"; do
+    echo "Building and uploading talos-docgen-${os}-${arch}"
+    CGO_ENABLED="0" GOWORK="" GOOS="${os}" GOARCH="${arch}" go build -trimpath -ldflags="-buildid=" -o "talos-docgen-${os}-${arch}" .
+    sum=$(sha256sum "talos-docgen-${os}-${arch}" | cut -d ' ' -f1) && echo "Binary sha256sum: ${sum}"
+    file "talos-docgen-${os}-${arch}"
+    aws s3 "${awsFlags[@]}" cp "./talos-docgen-${os}-${arch}" "${s3CASPath}/${sum}"
+    echo
+    cat << EOF >> "bazelout.txt"
+    http_file(
+        name = "com_github_siderolabs_talos_hack_docgen_${os}_${arch}",
+        urls = [
+            "${publicCASPath}/${sum}",
+        ],
+        executable = True,
+        sha256 = "${sum}",
+    )
+EOF
+  done
+done
+
+# Print the bazel output
+cat bazelout.txt
+echo