Support custom colours in prompts about gitsh HOT 3 CLOSED

git-config has some awesome colour related features built into it that we should be taking advantage of. The git-config(1) man page gives this example:

An example to use customized color from the configuration in your script:

#!/bin/sh
WS=$(git config --get-color color.diff.whitespace "blue reverse")
RESET=$(git config --get-color "" "reset")
echo "${WS}your whitespace color or blue reverse${RESET}"

…

The value for these configuration variables is a list of colors (at most two) and attributes (at most one), separated by spaces. The colors accepted are normal, black, red, green, yellow, blue, magenta, cyan and white; the attributes are bold, dim, ul, blink and reverse. The first color given is the foreground; the second is the background. The position of the attribute, if any, doesn’t matter.

Additionally, git-log formats support the same colour options as git-config within a %C(…) placeholder. Mimicking this behaviour would be nice:

The [format] placeholders are:

• …
• %Cred: switch color to red
• %Cgreen: switch color to green
• %Cblue: switch color to blue
• %Creset: reset color
• %C(…): color specification, as described in color.branch.* config option

Overall, I think this means we should:

1. Replace the hard-coded colour/status mappings with calls like git config --get-color color.gitsh.prompt.uninitialized "normal red"
2. Support the same %C placeholders that are supported by git-log, and convert %C(foo bar) to a call like git config --get-color "" "foo bar"

If we want to go even further, git-log supports %C(auto) which will cause any subsequent placeholders to be colours appropriately. I'm not sure I see the benefit for prompts though: a user only has one prompt at once, whereas they could have many log formats in scripts, aliases etc. Keeping the format colours in the format strings would be repetitious, but keeping prompt colours directly in the prompt is probably fine.

from gitsh.

Work in progress: https://github.com/thoughtbot/gitsh/compare/gb-custom-prompt-colors

from gitsh.

Done and merged.

from gitsh.