3 files changed, 15 insertions, 4 deletions
diff --git a/extra/sitemap/README.md b/extra/sitemap/README.md
index 735ac925..f72893cd 100644
--- a/extra/sitemap/README.md
+++ b/extra/sitemap/README.md
@@ -1,4 +1,15 @@
 
+## HOWTO: Update
+
+After a container dump, as `fatcat` user on prod server:
+
+    cd /srv/fatcat/sitemap
+    export DATE=`date --iso-8601` # or whatever
+    /srv/fatcat/src/extra/sitemap/container_url_lists.sh $DATE /srv/fatcat/snapshots/container_export.json.gz
+    /srv/fatcat/src/extra/sitemap/release_url_lists.sh $DATE /srv/fatcat/snapshots/release_export_expanded.json.gz
+    # delete old sitemap url lists
+    /srv/fatcat/src/extra/sitemap/generate_sitemap_indices.py
+
 ## Background
 
 Google has a limit of 50k lines / 10 MByte for text sitemap files, and 50K
diff --git a/extra/sitemap/generate_sitemap_indices.py b/extra/sitemap/generate_sitemap_indices.py
index 9766ac1f..0a5624a1 100755
--- a/extra/sitemap/generate_sitemap_indices.py
+++ b/extra/sitemap/generate_sitemap_indices.py
@@ -6,7 +6,7 @@ import datetime
 
 def index_entity(entity_type, output):
 
-    now = datetime.datetime.now().isoformat()
+    now = datetime.date.today().isoformat()
     print("""<?xml version="1.0" encoding="UTF-8"?>""", file=output)
     print("""<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">""", file=output)
 
diff --git a/extra/sitemap/release_url_lists.sh b/extra/sitemap/release_url_lists.sh
index 4190011f..d5c8d4ef 100755
--- a/extra/sitemap/release_url_lists.sh
+++ b/extra/sitemap/release_url_lists.sh
@@ -6,14 +6,14 @@ set -o pipefail     # fail if part of a '|' command fails
 
 : ${1?' You you did not supply a date argument'}
 : ${2?' You you did not supply an input file (JSON gzip)'}
-if [ -f $2 ] ; then
+if [ ! -f $2 ] ; then
   echo "Input file not found: $2" && exit 1;
 fi
 
 # eg, 2020-08-19
-DATE = "$1"
+DATE="$1"
 # eg, release_export_expanded.json.gz
-EXPORT_FILE_GZ = "$2"
+EXPORT_FILE_GZ="$2"
 
 # filter to fulltext releases only, then filter to only one hit per work
 zcat $EXPORT_FILE_GZ \