Management is by the included ./dotz shell script. Subcommands are ./dotz status and ./dotz update.
Dotfiles are stored in files/ and the destination is configured in dotzrc.
Internally dotz stores the list of managed files in an associate array. The
key is the file name in files/, the value is the location to copy the config
file to.
M4 is used for macros to allow per host configs and common settings to
abstracted out of the configs to a common location. Macros are defined in
m4/variables. The short hostname is passed as M4_HOST.
Generating a config is effectively a one liner:
cat m4/variables files/{src} | m4 -P -DM4_HOST=$(hostname -s) > {dst}
where {src} is the source file in files/ and {dst} is the location to write the config.
To generate a diff between the generated config and what is currently live:
cat m4/variables files/{src} | m4 -P -DM4_HOST=$(hostname -s) | diff {dst} -
The dotz utility wraps all this in the above mentioned subcommands.