corvino/tilde

Currently a focus on Emacs, git, OS X, and Bash—probably in that order.

The most active of these is certainly .emacs, followed by .bashrc. These days I spend most of my time on OS X—where I use the latest GNU Emacs release. At least for the moment I've given up most pretences of maintaining OS/Emacs cross-compatibility. Although I expect most of the basics will work anywhere.

Setup

There is a setup.sh bash script that creates symlinks from the ~ to the appropriate files.

Before creating the symlinks, the script also attempts to move any conflicting files from ~ to BACKUP. If a file is already appropriately symlinked, it is skipped. BACKUP is only created if it is needed; and if it is needed and exists, the script does not attempt to backup or link.

The setup process is simple: clone and run setup.sh.

Git Scripts

• git-sub-stats.sh Uses find to traverse the tree for the CWD and find any .git directories, indicating git repos (possibly submodules). Outputs stats on those repos.

  • -o, --only-branches Only show repos that have branches checked out (no headless tag or commit checkouts).
  • -n, --no-current Does not show the CWD repo.
  • -c, --no-commit Adds a column with the commit hash for each repo.
  • -p, --preserve-separator Instead of pretty-formatting with column, leaves the fields separated by the more machine-friendly :. Useful for passing the output to other scripts, such as git-sub-sync.sh.

• git-sub-sync.sh Fetches and merges the git repos with the stdin input format of :. Each line represents a repo to update to the latest version of the specified branch. Calls git fetch, git checkout <branch>, and git merge on each repository. Lines beginning with # are treated as comments and ignored.

  This is compatible with output format of git-sub-stats.sh -o -n -p, which outputs three fields for each repo--the path to the subdirectory, the branch the repo is on, and the date of the last update. git-sub-sync.sh simply ignored additional fields after the first two.

  Example:

  git-sub-sync.sh < submodule-targets.data
  

Remote Tasks

Ansible is nice for grooming remote hosts.

The first playbook to run is one to push authorized keys to the remote host, in this case installKeys.yml. This requires sshpass, which can be installed with:

brew install https://raw.githubusercontent.com/kadwanev/bigboybrew/master/Library/Formula/sshpass.rb
# or
apt-get install sshpass

Then run:

# The comma causes Ansible to interpret the inventory as hostname/ip adress.
# -k (--ask-pass) causes ansible to ask for connection password
ansible-playbook -i <address>, installKeys.yml -k

To push .tilde and run setup to a remote machine:

ansible-playbook -v -i <address>, installTilde.yml

Emacs

.emacs attempts to be as lightweight as possible. It avoids any package manager—Emacs seems to have at least 37 of them, so just deciding on one seems prohibitively complicated. The bash script ~/.elisp/update.sh uses curl to download any needed dependencies to ~/.elsip.

These dependencies are checked in, so updating is not necessary to get started, and git can be used following the update to see what, if anything, changed.