libro is a command line tool that provides facilities to manage one or more collections of ebooks, keeping track of their metadata and/or additional information the user wants to record.

You can think of libro as something close to beets but for books.

With golang binary installed on your system, you just need to run: ̀``shell go install github.com/pirmd/libro

## USAGE
Usage with some help guidance can be obtained from `libro`'s command line by running:
``` shell
libro -help

libro sub-commands are developed so that they can be combined (i.e. piped) together or with other command-line tools to developed your own books management workflows. For example, importing books can be run like:

libro info "my_book.epub" | vipe --suffix json | libro insert --root=$HOME/books
̀̀``
Or
``̀`shell
libro info -use-guesser -use-googlebooks "my_book.epub" \
          | libro edit -auto -default Language=fr -editor=vimdiff \
          | libro check -completeness -conformity \
          | libro insert -root="$HOME/books -rename='{{template "shortname_byauthor.gotmpl" .}}

To communicate through pipes, libro outputs book's attributes in JSON format that is understood by each librosub-command. libro detects when output is for a terminal rather than a pipe and will switch-over to a more human-friendly format. This behavior can be altered using -format flag.

Some libro features accept user-defined templates.

Templating language is based on golang's built-in template language (https://pkg.go.dev/text/template) extended with the following helpers:

• path management:
  • base : get the path basename
  • ext : get file extension
  • sep : return a path separator ('' of '/')
  • sanitizePath : replace special chars that don't usually work well when use in path name
  • sanitizeFilename: like sanitizePath but also removes any path separators.
  • nospace : get rid of spaces
• strings management:
  • join : join elements separating them wit the given separator.
  • lower: convert string to lower-case
  • title: convert string to title-case
  • upper: convert string to upper-case
• serialization:
  • toJSON : converts an interface to JSON representation.
  • toPrettyJSON: converts an interface to an easy-to-read JSON representation.
• templating:
  • tmpl : execute a sub-template by name. Sub-templates are chosen from t namespace. Unlike {{template xXx}}, tmpl allows to pipe its result to another command.

Some pre-defined templates are available:

• when renaming books (invoke by -rename={{template "xXx" .}}):
  • fullname.gotmpl : Author[0] - [Series SeriesIndex] - Title [LANG].epub
  • fullname_byauthor.gotmpl : Author[0]/Author[0] - [Series SeriesIndex] - Title [LANG].epub
  • shortname.gotmpl : Title.epub
  • shortname_byauthor.gotmpl: Author[0]/Title.epub In each cases, Author[0] is the first known Authors. Empty Authors is replaced by 'Unknown" Unknown or empty SeriesxXx, or LANG are ignored.
• when formatting books information (invoke by -format={{template "xXx" .}}):
  • book.txt.gotmpl: format book's attributes as plaintext in a key: value fashion. Empty optional attributes are not displayed.

Examples:

libro info -format='{{toPrettyJSON .}}' my_book.epub

or

libro info "my_book.epub" | libro insert -rename='{{template "shortname_byauthor.gotmpl" .}}

or

libro info "my_book.epub" | libro insert -rename='{{ tmpl "shortname.gotmpl" . | nospace }}

User-defined templates can be loaded using specific flags like:

libro info -format-tmpl=$HOME/books/my_template.gotmpl -format='{{template "my_template.gotmpl" .}}' "my_book.epub"

or

libro info "my_book.epub" | libro insert -rename-tmpl=$HOME/books/my_template.gotmpl -rename='{{template "my_template.gotmpl" .}}

libro adopts some opinionated behavior when processing book's information. Main ones are:

• when exact ISBN match is found online, online information is preferred over EPUB's metadata or over guessed ones;
• when a match is found online but ISBN are not similar, online information is only used to complete information obtained from EPUB's metadata or guessed;
• guessed information are usually not preferred over EPUB's metadata or online information.

When editing book's information (using libro edit), user is only asked to review information if:

• key attributes are not filled,
• unresolved conflicts or dubious automatic operation have been performed. This behavior can be altered using -auto or -dont-edit flags.

libro can run guessers to complete (and/or confirm) Book's metadata. Current guessers are:

• guess Title, Series, Authors or Language from Book's filename,
• guess Series information from Book's Title or SubTitle,
• guess ISBN by extracting it from the EPUB's content. Use of guessers is governed by the -use-guesser flag of libro info sub-command.

libro can run different check to verify quality, completness or conformity of information collected about an EPUB or of the EPUB's itself. Findings requiring end-user attention are inserted into a specific book's attributes ('Issues') for later processing.

libro relies on EPUBcheck tool for conformity verification.

libro uses the following attributes for a Book:

• Path: Path is the location of the book's file in the file-system.
• Title: Title is the book's title.
• Authors: Authors is the list names of the authors and/or editors for this book.
• ISBN: ISBN is the unique industry standard identifier for this book. libro tends to prefer ISBN_13 format when available or when it can be derived from an ISBN_10. ISBN10 and ISBN13 methods can be invoked to convert from one format to the other.
• SubTitle: SubTitle is the book's sub-title.
• Publisher: Publisher is the publisher of this book.
• PublishedDate: PublishedDate is the date of publication of this book. libro tries to normalize dates using '2006-01-02' format. When 'precision' of date is not enough to capture known month or days, date is cut to '2006-01' or simply to '2006'.
• Description: Description is the synopsis of the book. The text of the description is formatted in HTML and includes simple formatting elements.
• Series: Series is the series to which this book belongs to.
• SeriesIndex: SeriesIndex is the position in the series to which the book belongs to.
• SeriesTitle: SeriesTitle is the book's title in the series (without Series nor SubTitle information).
• Language: Language is the book's language. It is the two-letter ISO 639-1 code such as 'fr', 'en'.
• PageCount: PageCount is total number of pages of this book.
• Subject: Subject is the list of subject categories, such as "Fiction", "Suspense".
• Issues: Issues collects (possible) issues encountered during Book's processing that deserve end-user attention.
• SimilarBooks SimilarBooks collects alternative Book's metadata that are possibly better or more complete than actual metada set.

Beside bug hunting and improved user experience, main functions planned to be developed (in no special order):

• more scrapers to retrieve metadata from known remote sites;
• more guessers with ability to easily extend current guessers;
• more metadata processing to improve cleaning, quality, correctness and safety of collection content;
• tweak output template to issue static html description of the collection;
• improve batch operation (add several media at a time);
• add book indexing support for getting fancy search features;
• syncing file's embedded metadata with metadata stored in the collection;
• new media family to be supported (like mp3).

If you feel like to contribute, just follow github guidelines on forking then send a pull request