Create and use gofmt.sh wrapper script

gofmt.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+
+set -uo pipefail
+IFS=$'\n\t'
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+source "$DIR/_reformat-common.bash"
+
+set -e
+
+file="$1"
+
+pushd "$(dirname "$file")" 2>&1
+
+wrflog hello
+
+if [[ "$WOULD_REFORMAT" = "would_reformat" ]]; then
+    success_retval=0
+    would_reformat_retval=1
+    syntax_error_retval=2
+
+    set +e
+    out=$(gofmt -l "$file")
+    exitval="$?"
+    set -e
+
+wrflog out: "$out"
+
+    if [[ "$exitval" = "$syntax_error_retval" ]]; then
+        retval="$exitval"
+    elif [[ "$out" = "$file" ]]; then
+        retval="$would_reformat_retval"
+    else
+        # success
+        retval="$exitval"
+    fi
+
+    echo "$out"
+    exit "$retval"
+
+fi
+
+if [[ "$WOULD_REFORMAT" = "do_reformat" ]]; then
+    out=$(npx prettier --write "$file" 2>&1 >/dev/null)
+    retval="$?"
+
+    echo "$out"
+    exit "$retval"
+fi
+
+exit 255