Add watch script

watch/README.md

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+# watch
+A small script to help me remember were I left off playing
+alphabetically ordered media files.
+
+## Configuration
+The path containing the media can be set via the `WATCH_SRC_PATH`
+environment variable. The path for keeping the symlinks (the current
+file to be watched) can be set via the `WATCH_LINK_PATH` environment
+variable. If `WATCH_LINK_PATH` is not set the symlinks are kept in the
+folder of the series and will point to a relative path. If
+`WATCH_LINK_PATH` is set the symlink points to an absolute path.

watch/input.conf

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+q quit 5

watch/watch.sh

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+#!/bin/sh
+set -e
+
+src_path="${WATCH_SRC_PATH:-/media/hdd1/media/series}"
+link_path="${WATCH_LINK_PATH:-}"
+
+find_series() {
+    find "$src_path" -maxdepth 1 -printf "%f\\n" | sort | grep -v "$(basename "$src_path")"
+}
+
+next() {
+    find . -maxdepth 1 -printf "%f\\n" | sort | grep -A1 "$(readlink "$current")" | tail -n 1
+}
+
+if [ "$#" -ne 1 ]; then
+    echo "Usage: $0 SERIES | list"
+    exit 1
+fi
+
+# get config_path for mpv's input.conf
+if [ -L "$(command -v "$0")" ]; then
+    conf_path="$(cd "$(dirname "$(command -v "$0")")" && cd "$(dirname "$(readlink "$0")")" && pwd)"
+else
+    conf_path="$(cd "$(dirname "$0")" && pwd)"
+fi
+
+# check for "list" argument
+if [ "$1" = "list" ]; then
+    find_series
+    exit 0
+fi
+
+# if no "list" argument find series and play, if viewed to the end, set
+# "${series}_current" symlink to next
+find_series | while read -r series; do
+    if [ "$1" = "$series" ]; then
+        cd "$src_path/$series"
+        if [ -z "$link_path" ]; then
+            src_path=""
+            current="${series}_current"
+        else
+            src_path="$src_path/$series/"
+            current="${link_path}/${series}_current"
+        fi
+
+        if [ ! -f "$current" ]; then
+            ln -s "$src_path$(find . -maxdepth 1 -printf "%f\\n" | tail -n+2 | sort | head -n1)" "$current"
+        fi
+
+        mpv --input-conf "${conf_path}/input.conf" "$current" && ln -sf "$src_path$(next)" "$current"
+    fi
+done