ci: bump go and moby, rework clone function

script/known-failures.txt

@@ -1,5 +0,0 @@
-# Unhandled identifier character: 'ŝ'
-examples/go/src/math/big/arith.go
-
-# Unhandled identifier character: 'ƒ'
-examples/moby/vendor/github.com/beorn7/perks/quantile/stream.go

script/parse-examples

@@ -1,36 +1,47 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-set -e
+set -eu
 
 cd "$(dirname "$0")/.."
 
-function checkout_at() {
-  repo=$1; url=$2; sha=$3
-  if [ ! -d "$repo" ]; then
-    git clone "https://github.com/$url" "$repo"
-  fi
-
-  pushd "$repo"
-  git fetch && git reset --hard "$sha"
-  popd
+function clone_repo {
+	owner=$1
+	name=$2
+	sha=$3
+
+	path=examples/$name
+	if [ ! -d "$path" ]; then
+		echo "Cloning $owner/$name"
+		git clone "https://github.com/$owner/$name" "$path"
+	fi
+
+	pushd "$path" >/dev/null
+	actual_sha=$(git rev-parse HEAD)
+	if [ "$actual_sha" != "$sha" ]; then
+		echo "Updating $owner/$name to $sha"
+		git fetch
+		git reset --hard "$sha"
+	fi
+	popd >/dev/null
 }
 
-checkout_at "examples/go" "golang/go" "870e12d7bfaea70fb0d743842f5864eb059cb939"
-checkout_at "examples/moby" "moby/moby" "f57f260b49b6142366e6bc1274204ee0a1205945"
+clone_repo golang go d75cc4b9c6e2acb4d0ed3d90c9a8b38094af281b
+clone_repo moby moby ecbd126d6ac8c6818786f67e87f723543a037adb
 
-known_failures="$(cat script/known-failures.txt | egrep -v '^#')"
+known_failures="$(cat script/known-failures.txt)"
 
-time tree-sitter parse -q \
-  'examples/**/*.go'  \
-  '!**/testdata/**/*' \
-  '!**/go/test/**/*'  \
-  $(for failure in $known_failures; do echo "!${failure}"; done)
+# shellcheck disable=2046
+tree-sitter parse -q \
+	'examples/**/*.go' \
+	'!**/testdata/**/*' \
+	'!**/go/test/**/*' \
+	$(for failure in $known_failures; do echo "!${failure}"; done)
 
-example_count=$(find examples -name '*.go' | egrep -v 'go/test|testdata' | wc -l)
-failure_count=$(wc -w <<< "$known_failures")
-success_count=$(( $example_count - $failure_count ))
-success_percent=$(bc -l <<< "100*${success_count}/${example_count}")
+example_count=$(find examples -name '*.go' | grep -E -v -c 'go/test|testdata')
+failure_count=$(wc -w <<<"$known_failures")
+success_count=$((example_count - failure_count))
+success_percent=$(bc -l <<<"100*${success_count}/${example_count}")
 
 printf \
-  "Successfully parsed %d of %d example files (%.1f%%)\n" \
-  $success_count $example_count $success_percent
+	"Successfully parsed %d of %d example files (%.1f%%)\n" \
+	$success_count "$example_count" "$success_percent"