Look into alternative dotfile managers

[jwodder]

Desired features:

• Individual files are always specified by path (relative to $HOME or dotfile root), not by user-defined key
• I don't have to write out file paths three times in key names, src, and dst
• Showing a diff between current $HOME and what would be installed
  • Excluding items in $HOME or subdirectories thereof from the comparison
• Templating/conditional logic in files
  • OS variable in template
• Conditionally installing files based on profile (optional), OS, selected "features", etc.
• Detects & preserves executable bits
• Installing to a temp directory (including using profiles & OS details that differ from the local machine)
• Backing up pre-existing files in $HOME before installing over them
• Supports storing machine-specific configuration in a config file