Enable option to use some custom path to hugo

- Turns out, it works on the server, but not fom the crontab
- The GOPATH environment variable does indeed suck
  - It is not required for launching (some precompiled) hugo

auto_build.sh

@@ -13,7 +13,7 @@ CLONE_DIR=${CLONE_DIR="$HOME/homepage"}  # local checkout path
 ORIGIN=${ORIGIN="origin"}
 BRANCH=${BRANCH="main"}
 
-GOPATH=${GOPATH="$HOME/go/bin"}
+HUGO_CMD=${HUGO_CMD="hugo"}
 WWWDIR=${WWWDIR="/var/www/www"}
 
 # bugs ahead
@@ -92,13 +92,12 @@ latest_remote_sha () {
 build_page() {
     TMPDIR=$(mktemp -d -t hugo_build_XXXXX)
 
-    PATH=$PATH:$GOPATH \
-        hugo \
-            --quiet \
-            --enableGitInfo \
-            --source "$CLONE_DIR" \
-            --destination "$TMPDIR" \
-        || exit 1
+    $HUGO_CMD \
+        --quiet \
+        --enableGitInfo \
+        --source "$CLONE_DIR" \
+        --destination "$TMPDIR" \
+    || exit 1
 
     rm -rf "${WWWDIR:?}"/*
     cp -r "$TMPDIR"/. "$WWWDIR"