vladshablinsky

Homebrew: Formula renames

Workflow

• Explore tap structure
• Check if the installed formula in the Cellar belongs to appropriate tap while performing migrations
• Metadata for tap formula migrations
• Dependencies on taps
• What if several formulae installed to the same directory
• Skip if multiple taps formulae installed???

vladshablinsky

Here is the diff for the week.

• Worked on scripts for testing update. Tested.
• Wrote some unit test.
• Found some bugs in relative symlinks in migrator and fixed them.
• Checked migration for openssl with otool -- everything is OK

Plans for next week

vladshablinsky

set nocompatible              " be iMproved, required
filetype off                  " required

" set the runtime path to include Vundle and initialize
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
Plugin 'gmarik/Vundle.vim'

" My plugins
Plugin 'tpope/vim-fugitive'

vladshablinsky

• tmux new -s basic
• prefix d
• tmux ls
• tmux attach -t second_session
• tmux kill-sessions -t basic
• prefix c — new window in a session
• prefix , — rename window
• prefix n — next window
• prefix p — previous window
• prefix 0

vladshablinsky

Formula renames: allow any type of renames

I suggest you reading this and not going deeply into the details at first, because several approaches are described here and something can be wrong at some point and then another approach is introduced.

Metadata

Let's describe core formula renames at this point and then try to add same functionality to taps.

vladshablinsky

• exception should be raised if installed formula is not the one we're installing/upgrading/whatsoever
• the same for dependencies
• dependencies seems to work, since reqursive dependencies have to_formula it's the main point here. to_formula calls Formulary.factory, which resolves name ✅❎
• rename command

vladshablinsky

➜ vlad:bundler$ sw_vers                                                                                                                master
ProductName:	Mac OS X
ProductVersion:	10.10.5
BuildVersion:	14F27
➜ vlad:bundler$ ruby -v                                                                                                                master
ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin14]
➜ vlad:bundler$ rvm -v                                                                                                                 master

vladshablinsky

Mar-18 02:37:50 <1> : kiwi --build /home/vlad/Projects/git/machinery/spec/definitions/boxes/definitions/base_opensuse13.2_kvm --destdir /tmp/pennyworth-builds --logfile /tmp/pennyworth-builds/kiwi-terminal-output.log
Mar-18 02:37:50 <1> : kiwi revision: abefa16730fcf356afb2b45b71d93d13dae02780
Mar-18 02:37:50 <1> : Setting log file to: /tmp/pennyworth-builds/kiwi-terminal-output.log
Mar-18 02:37:50 <1> : EXEC [/usr/bin/uname -m]
Mar-18 02:37:50 <1> : EXEC [/usr/bin/uname -m]
Mar-18 02:37:50 <1> : Description provides no MD5 hash, check
Mar-18 02:37:50 <1> : Reading image description [Prepare]...
Mar-18 02:37:50 <1> : EXEC [/usr/bin/uname -m]
Mar-18 02:37:50 <1> : EXEC [rm -f /var/cache/kiwi/zypper/repos/* 2>&1]
Mar-18 02:37:50 <1> : Setting up package manager: 

vladshablinsky

Concept

(The blockquote style does not look so well so I just pasted directly, but these are all quoted from the links in the bottom of this page)

You should not implement to_str unless your object acts like a string, rather than just having a string representation. The only core class that implements to_str is String itself.

[to_i and to_s] are not particularly strict: if an object has some kind of decent representation as a string, for example, it will probably have a to_s method… [to_int and to_str] are strict conversion functions: you implement them only if you object can naturally be used every place a string or an integer could be used.

to_str is used by methods such as String#concat to convert their arguments to a string. Unlike to_s, which is supported by almost all classes, to_str is normally implemented only by those classes that act like strings. Of the built-in classes, only Exception and String implement to_str

vladshablinsky