feat: read overrides from breaktimer.conf

Every tunable was a variable in a tracked script, so a personal value could
only live as an uncommittable edit. The repository copy and the installed
copy had already drifted over three sound paths pointing into a home
directory, which is the argument in one line.

Bash sources files natively: no format, no parser, and a syntax error is a
bash error at start rather than a silent fallback to a default.

1 files changed, 8 insertions, 0 deletions

diff --git a/breaktimer.sh b/breaktimer.sh
index 9a9c5fa..7c8bfa3 100755
--- a/breaktimer.sh
+++ b/breaktimer.sh
@@ -47,6 +47,14 @@ SYS_SOUND_LONG="$SOUND_DIR/alarm-clock-elapsed.oga"
 SYS_SOUND_BACK="$SOUND_DIR/service-login.oga"
 # ------------------------------------
 
+# Overrides, if any. Bash sources files natively, so there is no format and no
+# parser: a syntax error here is a bash error at start, on stderr, which is the
+# loudest possible failure and the right one. Read once, here, which means a
+# change needs `breaktimer.sh restart` to take effect. The `run` subcommand
+# re-execs this script through setsid, so the daemon reads it too.
+CONFIG_FILE="${XDG_CONFIG_HOME:-$HOME/.config}/breaktimer.conf"
+[ -f "$CONFIG_FILE" ] && . "$CONFIG_FILE"
+
 RUNTIME="${XDG_RUNTIME_DIR:-/tmp}"
 PID_FILE="$RUNTIME/breaktimer.pid"
 STATE_FILE="$RUNTIME/breaktimer.state"     # running|paused