initial commit

.gitignore

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+out/
+src/
+
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# Metadata left by Dolphin file manager, which comes with KDE Plasma
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+# Log files created by default by the nohup command
+nohup.out
+
+# General
+.DS_Store
+__MACOSX/
+.AppleDouble
+.LSOverride
+Icon[
+]
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# Windows thumbnail cache files
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+!*.code-workspace
+
+# Built Visual Studio Code Extensions
+*.vsix

to-m4b.sh

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+#!/usr/bin/env bash
+set -x
+set -eufo pipefail
+
+# CONSTANTS
+declare -r m4b-tool="nix run github:sandreas/m4b-tool#m4b-tool-libfdk -- "
+declare -r script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# VARS
+LEADING_ZEROES=2
+SRC="${SRC:${script_dir}/src}"
+OUT="${OUT:${script_dir}/out}"
+AUTHOR="${AUTHOR:-}"
+NARRATOR="${NARRATOR:-}"
+TITLE="${TITLE:-}"
+YEAR="${YEAR:-}"
+SERIES="${SERIES:-}"
+SERIES_INDEX="${SERIES_INDEX:-}"
+
+# FUNCTIONS
+parse-vars() {
+  # TODO implement parsing the directory structure to fill in missing vars and return them
+  # Series structure: ${SRC}/<author>/<series>/Book <part> - <year> - <book> {<narrator>}/
+  # Standalone structure: ${SRC}/<author>/<year> - <book> {<narrator>}/
+  # Return the <part> wihh leading zeros based on the LEADING_ZEROES variable
+}
+
+get-book-directories() {
+  # TODO implemet getting the book directoris based on the ${SRC} path
+  # find the directories that contains the books files and return them as an array
+  # Example book directory:
+  # /path/to/src/Author/Series/Book Part - Year - Book {Narrator}/
+  # /path/to/src/Author/Year - Book {Narrator}/
+}
+
+m4b-merge() {
+  local output_file="${1}"
+  local source_dir="${2}"
+  local author="${3}"
+  local narrator="${4}"
+  local title="${5}"
+  local year="${6}"
+  local series="${7}"
+  local series_index=${8}
+
+  mkdir -p "$(dirname "${output_file}")"
+  "${m4b-tool}" \
+    merge \
+      -v \
+      --jobs=6 \
+      --audio-samplerate=44100 \
+      --audio-quality=100 \
+      --writer="${author}" \
+      --artist="${narrator}" \
+      --title="${title}" \
+      --year="${year}" \
+      --album="${series}" \
+      --album-sort="${series_index}" \
+      --output-file="${output_file}/" \
+      -- "${source_dir}"
+}
+
+main() {
+  parse-vars
+  local book_dirs
+  IFS=$'\n' read -r -d '' -a book_dirs < <(get-book-directories && printf '\0')
+  for book_dir in "${book_dirs[@]}"; do
+    local book_output_file="${OUT}/${AUTHOR}/${(SERIES:+${SERIES}/)}${(SERIES:+Book ${SERIES_INDEX} - )}${YEAR} - ${TITLE}.m4b"
+    m4b-merge "${LEADING_ZEROES}" "${book_output_file}" "${book_dir}" "${AUTHOR}" "${NARRATOR}" "${TITLE}" "${YEAR}" "${SERIES}" "${SERIES_INDEX}"
+  done
+}
+
+main "$@"