Allow configuration of output colors

[calebhearth]

It would be great if we could configure colors for the the output.

One potential configuration file format, inspired by Git's config but in TOML, could be like this. I've included the current (future default?) colors as examples.

# single value specifies foreground color
[color]
  equal = "normal # normal is the default terminal color, as opposed to white or"
                  # black which would override the terminal and potentiall be
                  # invisible
  date = "normal"
  key = "brightblue"
  null = "yellow"
  numeric = "magenta"
  string = "brightgreen"

# two values specify foreground and background colors, and a third value
# specifies text style (i.e., bold, italic, underline, normal)
[color.levels]
  debug = "black cyan bold"
  info = "black green bold"
  warning = "black yellow bold"
  error = "black red bold"
  fatal = "red black bold"

# color values could be specified as:
# - "normal" (default terminal color)
# - standard colors (black, red, yellow, blue, magenta, cyan, white),
# potentially prefixed with "bright"
# - as hex codes

[TheEdgeOfRage]

Good idea 👍 I'll see if I can find some time over the weekend to implement this

[calebhearth]

As long as we're discussing config options, a few more that I've thought of, in no particular order:

• customize log levels
• Default log level (instead of INFO)
• "special" field name mappings. We currently treat "level" and "time"/"timestamp" specially, but I've also seen t and @timestamp in the wild.

And of course, there has to be a place for the file. I propose ${XDG_CONFIG_HOME:~/.config}/logfmt/config.toml or ${XDG_CONFIG_HOME:~/.config}/logfmt.toml

[TheEdgeOfRage]

Using anything other than $XDG_CONFIG_HOME is heresy and should be punishable 😄 I just don't know what the equivalent on MacOS is, but we'll see

[calebhearth]

It's unset on macOS by default, but the spec specifies falling back to "$HOME/.config" as in the above examples.