pumopm/README.org

* About PumoPM
  The Pumo Power  Manager (PumoPM for short)  is a custom power  manager I wrote
  for myself in order  to have a lightweight one that does  exactly what I want,
  how I  want. Basically: I  want to be  informed of a  low level of  battery (I
  consider 25% to be low, hence the defaults), very low (again, my preference is
  at 15%), and then at critical level (10%) I want the computer to automatically
  sleep, and if it stays asleep for a certain duration it will be suspended.

  This project is written for a GNU/Linux operating system running with systemd.
  I have  currently no plan  on making it  available on other  platforms, except
  maybe one day with [[https://guix.gnu.org/][Guix]] (if you don’t value your time, take a look at it, it’s
  an awesome operating system, much better than NixOS in my opinion).

** Built with
   [[http://spacemacs.org][file:https://cdn.rawgit.com/syl20bnr/spacemacs/442d025779da2f62fc86c2082703697714db6514/assets/spacemacs-badge.svg]]

   PumoPM  is written  in pure,  stable  Rust (at  least >=  1.45.2). Its  three
   dependencies are the crates [[https://github.com/svartalf/rust-battery][battery]], [[https://clap.rs/][clap]], and [[https://github.com/hoodie/notify-rust][notify-rust]].

** What does Pumo mean?
   It’s my cat’s name.

** Why is the main branch called ~senpai~?
   This is a joke that originated from [[https://www.reddit.com/r/ProgrammerAnimemes/][r/ProgrammerAnimemes]] when news were about
   defaulting to  another name than ~master~  for git’s main branch.  As a joke,
   someone proposed ~senpai~  on this reddit as an alternative  to ~master~, and
   here we are. This is a weeb’s joke.

* Getting started
  To run the project, you currently only have one option: download the project’s
  source code,  compile it, and  run it. You will  need to have  [[https://www.rust-lang.org/][Rust installed]].
  Update your  Rust installation  if needed with  ~rustup update~.  Then, simply
  begin with a ~git  clone~, then cd into the project’s  directory. You can then
  build the project with ~cargo~, and even install it locally if you want to.
  #+BEGIN_SRC sh
    $ git clone https://labs.phundrak.com/phundrak/pumopm
    $ cd pumopm
    $ cargo build --release
    $ cargo run --release # to run the project
    $ cargo install --path . # optional, to install for the user the project
  #+END_SRC

  If you are an Arch Linux user, make sure you have ~rustup~ installed, and then
  you can install PumoPM using the ~PKGBUILD~ available in the repository. To do
  so, simply run
  #+BEGIN_SRC sh
    $ makepkg -si
  #+END_SRC

  You will then have PumoPM installed as  a native package on your machine which
  you can uninstall using Pacman.

* Usage
  It is possible to run PumoPM with a couple of different flags. You will find
  their description here:
  - ~-h --help~ :: displays a help message
  - ~-V --version~ :: displays the program’s version
  - ~-l --low~ :: level at which the battery is considered to be low
  - ~-L --very-low~ :: level at which the battery is considered to be very low
  - ~-c --critical~ :: level at which the battery is considered to be critical
  - ~-r --refresh-rate~ :: refresh rate of the battery’s reads
  - ~-v --verbose~ :: augment the program’s verbosity, can be repeated
  The arguments ~-l~, ~-L~ and ~-c~ accept an integer between 5 and 95 (actually
  any value that will fit in an unsigned byte, but it will be rounded up to 5 or
  down to 95), while ~-r~ accepts any  integer that can fit in a ~u64~, although
  I’m sure you’ll never need that long of a refresh time.

  The levels  will also see  their values ordered. If  the ~-L~ value  is higher
  than ~-l~, then the program will automatically set it to one percent lower, or
  to 5% (whichever is  higher). Same goes for the value of ~-c~  if it goes over
  the ~-L~ value, including after the re-evaluation of the latter’s value. For
  instance, calling the program like so
  #+BEGIN_SRC sh
    $ pumopm -l 30 -L 32 -c 30
  #+END_SRC
  is the same as calling it like so
  #+BEGIN_SRC sh
    $ pumopm -l 30 -L 29 -c 28
  #+END_SRC

* TODO Roadmap [0/2]
  - [ ] system tray
  - [ ] close the program with the exit code ~0~

* License
  This project is under the GPL-3.0 or later license. You can read it [[file:LICENSE][here]], but
  basically, the following are allowed:
  - Commercial use of this program and its source code
  - Modification of the program and the source code
  - Distribution of the program and the source code
  - Patent use of the program and the source code
  - Private use of the program and the source code
  However, this program comes  with no warranty and I am  under no liability for
  what you do with it. The conditions of using this program are:
  - Notice your users of the license and copyright
  - State any changes in the code
  - Disclose the source code
  - Use the same license
  Please note that I  am no lawyer, and the only legal document  you can read is
  the one linked above.