From b1543275b4e1ff0e1324515eef14ee6b7f67044e Mon Sep 17 00:00:00 2001
From: Marc Michalsky <m.michalsky@posteo.de>
Date: Wed, 6 Sep 2023 18:01:21 +0200
Subject: [PATCH] implement an environment variable to exclude stuff

---
 .borg-env.example |  3 +++
 borgbackup.sh     | 22 +++++++++++-----------
 2 files changed, 14 insertions(+), 11 deletions(-)

diff --git a/.borg-env.example b/.borg-env.example
index 8f6fba6..424b4b9 100644
--- a/.borg-env.example
+++ b/.borg-env.example
@@ -14,6 +14,9 @@ export BORG_PASSPHRASE="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 # This array must containing everything you want to include in the backup
 export BORG_TARGETS=("$HOME")
 
+# Exclude directories and files
+export BORG_EXCLUDE=("$HOME/.config/borg" "$HOME/.cache" "*.db")
+
 # [optional] Use a ntfy service to publish backup results
 # export NTFY=true
 
diff --git a/borgbackup.sh b/borgbackup.sh
index 48eb92a..d4eac33 100755
--- a/borgbackup.sh
+++ b/borgbackup.sh
@@ -47,20 +47,20 @@ trap 'echo $( date ) Backup interrupted >&2; exit 2' INT TERM
 
 info "Starting backup"
 
+exclude() {
+    for entry in "${BORG_EXCLUDE[@]}"; do
+        echo "--exclude $entry"
+    done
+}
+
 # Backup the most important directories into an archive named after
 # the machine this script is currently running on:
 
-/usr/local/bin/borg create          \
-    --verbose                       \
-    --filter AME                    \
-    --list                          \
-    --stats                         \
-    --show-rc                       \
-    --compression lz4               \
-    --exclude-caches                \
-                                    \
-    ::"${mode}-{hostname}-{now}"    \
-    "${BORG_TARGETS[@]}"            \
+borg_command=("create" "--verbose" "--filter=AME" "--list" "--stats" "--show-rc" "--compression=lz4" "--exclude-caches")
+borg_command+=($(exclude))
+borg_command+=("::backup-{hostname}-{now}" "${BORG_TARGETS[@]}")
+
+/usr/local/bin/borg "${borg_command[@]}"
 
 backup_exit=$?