Đ (Edh) Package Manager

What is EPM

epm is a single bash script making it easy to put together various Đ (Edh) packages from different parties, and work well.

Edh has localization of package dependencies in mind, epm is so far semi-automatic in dealing with that, and ought to go fully automatic as it evolves.

EPM may evolve to have some GUI in the future, but stays merely the epm CLI at the moment.

• What is EPM
• Prerequisite
  • Operation System
  • UNIX Toolchain
  • Haskell Toolchain
• Installation
• Usage
  • Create a new EPM home
  • Develop your Edh projects
    • Code Editor for Đ (Edh)
  • Build Edh interpreters
• Roadmap

Prerequisite

Operation System

• Linux or macOS

  On Windows^TM ?

  Consider run a Linux guest VM through VMWare or VirtualBox.

UNIX Toolchain

You may already have all of them if you are a software developer

• bash - You already have it

  It comes with a decent Linux or macOS box.

• git - You get it

  From your Linux distribution's package manager, e.g.

  sudo apt install git

  Or for your macOS, run following command and follow its prompts

  Note: It installs a full fledged compiler toolchain, maybe bloating to you, yet better to have.

  xcode-select --install

Haskell Toolchain

That is, GHC plus X

• GHC

• Cabal-install

  You install'em all by any single one, or all of the following:

• ghcup

• Stack

• Nix

  Confused? You are not alone, just continue the struggling and keep questioning that many (yet none perfect) competing options with the Haskell community

Installation

curl -o ~/.local/bin/epm -L https://github.com/e-wrks/epm/raw/latest/epm

chmod a+x ~/.local/bin/epm

Check it installed correctly

$ epm --help
epm 0.2.7 >> Edh Package Manager <<

USAGE:
    epm [FLAGS] <SUBCOMMAND>

FLAGS:
    -v, --verbose      Enable verbose output
    -h, --help         Prints help information
    -V, --version      Prints version information
    -B, --base <URL>   URL prefix for upstream package repositories
                         default:  https://github.com/e-wrks
                         environment variable EPM_REPO_BASE overrides above

SUBCOMMANDS:
    init               Initialize current working directory as an EPM home
    install     | i    Install new, or change branches of existing packages
    list        | l    List homes and packages
    update | up | u    Pull upstream changes of packages from tracked branches
    with        | w    Run command within the directory of a package
    run | exec  | x    Run command with all effective EPM home's bin on $PATH
    rm                 Remove specified package(s) from nearest EPM home

Usage

Create a new EPM home

$ mkdir epm-home
$ cd epm-home
$ epm init edh nedh # and other packages you like

...

Installing edh to edh-universe/e-wrks/edh ...
Cloning into 'edh-universe/e-wrks/edh'...
remote: Counting objects: 3664, done.
remote: Compressing objects: 100% (677/677), done.
remote: Total 3664 (delta 2233), reused 3609 (delta 2211)
Receiving objects: 100% (3664/3664), 726.31 KiB | 9.95 MiB/s, done.
Resolving deltas: 100% (2233/2233), done.
Installed edh .
Installing nedh to edh-universe/e-wrks/nedh ...
Cloning into 'edh-universe/e-wrks/nedh'...
remote: Counting objects: 902, done.
remote: Compressing objects: 100% (244/244), done.
remote: Total 902 (delta 412), reused 842 (delta 384)
Receiving objects: 100% (902/902), 120.68 KiB | 3.35 MiB/s, done.
Resolving deltas: 100% (412/412), done.
Installed nedh .
$

Note epm maintains ${EPM_HOME}/edh-universe as both a valid Cabal project and a valid Stack project.

$ ls
edh-universe	edh_modules
$ cd edh-universe/
$ ls
bin		cabal.project	e-wrks		stack.yaml

and epm redirects Haskell executables to be built into ${EPM_HOME}/edh-universe/bin .

Develop your Edh projects

These 2 folders - edh-universe and edh_modules - are material of an EPM home and maintained by epm, you create folder structures beside them to organize your Edh related stuff, maybe just simple Edh scripts, full fledged interpreter packages, or database server and applications atop HasDB.

Code Editor for Đ (Edh)

The officially recommended code editor (and IDE) for Đ (Edh) is:

Visual Studio Code with Edh Language Pack

There you go with decent syntax highlighting and automatic code formatting.

Semantic hinting and debugging features will come along.

Build Edh interpreters

To build all Haskell exectuables (mosts are Edh interpreters with different sets of batteries included) from installed Edh packages, you can freely choose between Cabal-install and Stack whichever you like.

• with Cabal-install

The epm run subcommand treats cabal install specially, it adds --overwrite-policy=always and --installdir=${EPM_HOME}/edh-universe/bin to the actual command line.

$ epm run cabal install all:exes

...

 >> Managing packages at EPM home [/Users/cyue/epm-home] <<
Wrote tarball sdist to
/Users/cyue/epm-home/edh-universe/dist-newstyle/sdist/edh-0.3.0.0.tar.gz
Wrote tarball sdist to
/Users/cyue/epm-home/edh-universe/dist-newstyle/sdist/lossless-decimal-0.1.1.0.tar.gz
Wrote tarball sdist to
/Users/cyue/epm-home/edh-universe/dist-newstyle/sdist/nedh-0.1.0.0.tar.gz
Resolving dependencies...
Up to date
Symlinking 'edhi'
Symlinking 'nedh'
$

• or with Stack

epm sets local-bin-path: ${EPM_HOME}/edh-universe/bin in stack.yaml

$ stack install

...

lossless-decimal> configure (lib)
lossless-decimal> Configuring lossless-decimal-0.1.1.0...
lossless-decimal> build (lib)
lossless-decimal> Preprocessing library for lossless-decimal-0.1.1.0..
lossless-decimal> Building library for lossless-decimal-0.1.1.0..
lossless-decimal> [1 of 1] Compiling Data.Lossless.Decimal
lossless-decimal> copy/register
lossless-decimal> Installing library in /Users/cyue/epm-home/edh-universe/.stack-work/install/x86_64-osx/0654fccd5f476b2c5a8c0895b218cd844a1f8be9784b79bd15206177b5607fa2/8.8.3/lib/x86_64-osx-ghc-8.8.3/lossless-decimal-0.1.1.0-HCYm1yn9Rt2Jeqs1sJLXPz
lossless-decimal> Registering library for lossless-decimal-0.1.1.0..
Building all executables for `edh' once. After a successful build of all of them, only specified executables will be rebuilt.
edh             > configure (lib + internal-lib + exe)
edh             > Configuring edh-0.3.0.0...
edh             > build (lib + internal-lib + exe)
edh             > Preprocessing library 'edh-internal' for edh-0.3.0.0..
edh             > Building library 'edh-internal' for edh-0.3.0.0..
edh             > [ 1 of 19] Compiling Language.Edh.Control
edh             > [ 2 of 19] Compiling Language.Edh.Details.PkgMan
edh             > [ 3 of 19] Compiling Language.Edh.Details.RtTypes
edh             > [ 4 of 19] Compiling Language.Edh.Details.CoreLang
edh             > [ 5 of 19] Compiling Language.Edh.Details.Utils
edh             > [ 6 of 19] Compiling Language.Edh.Event
edh             > [ 7 of 19] Compiling Language.Edh.Parser
edh             > [ 8 of 19] Compiling Language.Edh.Details.Evaluate
edh             > [ 9 of 19] Compiling Language.Edh.Details.Tx
edh             > [10 of 19] Compiling Language.Edh.Batteries.Vector
edh             > [11 of 19] Compiling Language.Edh.Batteries.Reflect
edh             > [12 of 19] Compiling Language.Edh.Batteries.Math
edh             > [13 of 19] Compiling Language.Edh.Batteries.Evt
edh             > [14 of 19] Compiling Language.Edh.Batteries.Data
edh             > [15 of 19] Compiling Language.Edh.Batteries.Ctrl
edh             > [16 of 19] Compiling Language.Edh.Batteries.Console
edh             > [17 of 19] Compiling Language.Edh.Batteries.Assign
edh             > [18 of 19] Compiling Language.Edh.Runtime
edh             > [19 of 19] Compiling Language.Edh.Batteries
edh             > Preprocessing library for edh-0.3.0.0..
edh             > Building library for edh-0.3.0.0..
edh             > [1 of 1] Compiling Language.Edh.EHI
edh             > Preprocessing executable 'edhi' for edh-0.3.0.0..
edh             > Building executable 'edhi' for edh-0.3.0.0..
edh             > [1 of 2] Compiling Repl
edh             > [2 of 2] Compiling Main
edh             > Linking .stack-work/dist/x86_64-osx/Cabal-3.0.1.0/build/edhi/edhi ...
edh             > copy/register
edh             > Installing internal library edh-internal in /Users/cyue/epm-home/edh-universe/.stack-work/install/x86_64-osx/0654fccd5f476b2c5a8c0895b218cd844a1f8be9784b79bd15206177b5607fa2/8.8.3/lib/x86_64-osx-ghc-8.8.3/edh-0.3.0.0-73PuCsmdUcIHXX9IKK7eJA-edh-internal
edh             > Installing library in /Users/cyue/epm-home/edh-universe/.stack-work/install/x86_64-osx/0654fccd5f476b2c5a8c0895b218cd844a1f8be9784b79bd15206177b5607fa2/8.8.3/lib/x86_64-osx-ghc-8.8.3/edh-0.3.0.0-AIDEnedhsqmDPELtxqIvBW
edh             > Installing executable edhi in /Users/cyue/epm-home/edh-universe/.stack-work/install/x86_64-osx/0654fccd5f476b2c5a8c0895b218cd844a1f8be9784b79bd15206177b5607fa2/8.8.3/bin
edh             > Registering library 'edh-internal' for edh-0.3.0.0..
edh             > Registering library for edh-0.3.0.0..
Building all executables for `nedh' once. After a successful build of all of them, only specified executables will be rebuilt.
nedh            > configure (lib + internal-lib + exe)
nedh            > Configuring nedh-0.1.0.0...
nedh            > build (lib + internal-lib + exe)
nedh            > Preprocessing library 'nedh-internal' for nedh-0.1.0.0..
nedh            > Building library 'nedh-internal' for nedh-0.1.0.0..
nedh            > [1 of 7] Compiling Language.Edh.Net.Addr
nedh            > [2 of 7] Compiling Language.Edh.Net.MicroProto
nedh            > [3 of 7] Compiling Language.Edh.Net.Peer
nedh            > [4 of 7] Compiling Language.Edh.Net.Client
nedh            > [5 of 7] Compiling Language.Edh.Net.Server
nedh            > [6 of 7] Compiling Language.Edh.Net.Sniffer
nedh            > [7 of 7] Compiling Language.Edh.Net.Advertiser
nedh            > Preprocessing library for nedh-0.1.0.0..
nedh            > Building library for nedh-0.1.0.0..
nedh            > [1 of 1] Compiling Language.Edh.Net
nedh            > Preprocessing executable 'nedh' for nedh-0.1.0.0..
nedh            > Building executable 'nedh' for nedh-0.1.0.0..
nedh            > [1 of 2] Compiling Repl
nedh            > [2 of 2] Compiling Main
nedh            > Linking .stack-work/dist/x86_64-osx/Cabal-3.0.1.0/build/nedh/nedh ...
nedh            > copy/register
nedh            > Installing internal library nedh-internal in /Users/cyue/epm-home/edh-universe/.stack-work/install/x86_64-osx/0654fccd5f476b2c5a8c0895b218cd844a1f8be9784b79bd15206177b5607fa2/8.8.3/lib/x86_64-osx-ghc-8.8.3/nedh-0.1.0.0-IB11KjcvZDCA4St0hQLCbM-nedh-internal
nedh            > Installing library in /Users/cyue/epm-home/edh-universe/.stack-work/install/x86_64-osx/0654fccd5f476b2c5a8c0895b218cd844a1f8be9784b79bd15206177b5607fa2/8.8.3/lib/x86_64-osx-ghc-8.8.3/nedh-0.1.0.0-ILXJZuI6ug3CgbFjo1OY5g
nedh            > Installing executable nedh in /Users/cyue/epm-home/edh-universe/.stack-work/install/x86_64-osx/0654fccd5f476b2c5a8c0895b218cd844a1f8be9784b79bd15206177b5607fa2/8.8.3/bin
nedh            > Registering library 'nedh-internal' for nedh-0.1.0.0..
nedh            > Registering library for nedh-0.1.0.0..
Completed 3 action(s).
Copying from /Users/cyue/epm-home/edh-universe/.stack-work/install/x86_64-osx/0654fccd5f476b2c5a8c0895b218cd844a1f8be9784b79bd15206177b5607fa2/8.8.3/bin/edhi to /Users/cyue/epm-home/edh-universe/bin/edhi
Copying from /Users/cyue/epm-home/edh-universe/.stack-work/install/x86_64-osx/0654fccd5f476b2c5a8c0895b218cd844a1f8be9784b79bd15206177b5607fa2/8.8.3/bin/nedh to /Users/cyue/epm-home/edh-universe/bin/nedh

Copied executables to /Users/cyue/epm-home/edh-universe/bin:
- edhi
- nedh

Warning: Installation path /Users/cyue/epm-home/edh-universe/bin not found on the PATH environment variable.
$

Then you can run any of them:

$ epm run edhi

 >> Managing packages at EPM home [/Users/cyue/epm-home] <<
>> Bare Đ (Edh) Interpreter <<
* Blank Screen Syndrome ? Take the Tour as your companion, checkout:
  https://github.com/e-wrks/edh/tree/master/Tour
Đ: dir
/Users/cyue/epm-home/edh_modules/repl/__main__.edh:1:1
  __name__=/Users/cyue/epm-home/edh_modules/repl
  __repr__=module:/Users/cyue/epm-home/edh_modules/repl
  __file__=/Users/cyue/epm-home/edh_modules/repl/__main__.edh
Đ:

$ epm run nedh

 >> Managing packages at EPM home [/Users/cyue/epm-home] <<
>> Networked Edh <<
* Blank Screen Syndrome ? Take the Tour as your companion, checkout:
  https://github.com/e-wrks/nedh/tree/master/Tour
(net)Đ: dir
/Users/cyue/epm-home/edh_modules/net/__main__.edh:1:1
  sendData=@sendData
  dataChan=dataChan := "data"
  __name__=/Users/cyue/epm-home/edh_modules/net
  sendConMsg=@sendConMsg
  Advertiser=Advertiser
  Server=Server
  conin=conin := 0
  __repr__=module:/Users/cyue/epm-home/edh_modules/net
  sendConOut=@sendConOut
  sendCmd=@sendCmd
  __file__=/Users/cyue/epm-home/edh_modules/net/__main__.edh
  Client=Client
  consoleTo=consoleTo
  conout=conout := 1
  dataSink=@dataSink
  Peer=Peer
  netPeer=@netPeer
  Addr=Addr
  conmsg=conmsg := 2
  Sniffer=Sniffer
  consoleOn=consoleOn
  errChan=errChan := "err"
(net)Đ:

Roadmap

Features of priority to come next for EPM:

• Automatic dependency installation

• Validation, resolution, and automated settlement of versions of dependency

• Content-addressable local cache