357 lines
15 KiB
Markdown
357 lines
15 KiB
Markdown
GPrompt - useless gimmicky prompt for Bash on Linux
|
|
====================================================
|
|
|
|
GPrompt (short for GadgetoPrompt) is a gimmicky Bash prompt generator
|
|
that displays sort-of-useful information. It only works on Linux because
|
|
that's what I use. It adapts to the terminal's width, showing or hiding
|
|
information depending on the conditions.
|
|
|
|
## Features
|
|
|
|
GPrompt prompts may consist in one or two lines. The top line is separated
|
|
in three areas (left, midddle and right), while the second line (the "input"
|
|
line, where the cursor is) only has a single, left-aligned area. Each area
|
|
may be configured to display information from one of the generators. In
|
|
addition, the script may be configured to generate a terminal title and/or
|
|
terminal icon title.
|
|
|
|
### Session example
|
|
|
|
|
|
|
|
### Themes
|
|
|
|
#### Unthemed (but using custom layout):
|
|
|
|
|
|
#### `ascii_yb` theme
|
|
|
|
|
|
#### `ascii_gyr` theme
|
|
|
|
|
|
#### `blocks_yb` theme
|
|
|
|
|
|
#### `blocks_gyr` theme
|
|
|
|
|
|
#### `powerline_yb` theme
|
|
|
|
This theme requires a Powerline font.
|
|
|
|
|
|
|
|
#### `powerline_gyr` theme
|
|
|
|
This theme requires a Powerline font.
|
|
|
|
|
|
|
|
## Installing GPrompt
|
|
|
|
GPrompt may be installed either at the system level or on a per-user basis.
|
|
|
|
### User installation
|
|
|
|
* Copy the script and associated themes to your home directory.
|
|
|
|
mkdir -p ~/.local/share/gprompt/themes
|
|
cp gprompt.pl ~/.local/share/gprompt
|
|
chmod +x ~/.local/share/gprompt/gprompt.pl
|
|
cp themes/* ~/.local/share/gprompt/themes/
|
|
|
|
* Add the following line to your `~/.bashrc`:
|
|
|
|
export PROMPT_COMMAND='eval "$($HOME/.local/share/gprompt/gprompt.pl $?)"'
|
|
|
|
### System-wide installation
|
|
|
|
* In the case of a system-wide installation, the script and associated themes
|
|
must be copied to some shared location, e.g.
|
|
|
|
mkdir -p /usr/share/gprompt/themes
|
|
cp gprompt.pl /usr/share/gprompt
|
|
chmod +x /usr/share/gprompt/gprompt.pl
|
|
cp themes/* /usr/share/gprompt/themes/
|
|
|
|
* Users may then use GPrompt by adding the following line to their `~/.bashrc`
|
|
files (it could also be added to `/etc/skel/.bashrc` or `/etc/bash.bashrc`):
|
|
|
|
export PROMPT_COMMAND='eval "$(/usr/share/gprompt/gprompt.pl $?)"'
|
|
|
|
## Configuration
|
|
|
|
GPrompt comes with a minimal (...-ish, this is a gadget after all)
|
|
configuration that will work out of the box. However, it can be customised
|
|
using both a system-wide configuration file and a per-user configuration file.
|
|
Values set in a configuration files override values that were previously
|
|
loaded, so it is possible to have a system-wide configuration that replaces
|
|
most of the defaults and a per-user configuration that only overrides a few of
|
|
the system-wide options. In addition, if the option is enabled from the
|
|
configuration files, it is possible to override settings using environment
|
|
variables.
|
|
|
|
The GPrompt configuration is a Perl hash reference, so the general syntax of
|
|
the file goes something like this:
|
|
|
|
{
|
|
'some_key' => 'some_value' ,
|
|
'other_key' => [ 'list entry 1' , 'list entry 2' ] ,
|
|
}
|
|
|
|
In order to override a configuration entry using an environment variable,
|
|
the variable must be named `GPROMPT_` followed by the uppercase name of
|
|
the configuration entry. If the configuration expects a list for the
|
|
value in question, the value of the environment variable will be split using
|
|
the comma character. If a table is expected, keys and values are expected
|
|
to be separated by a colon.
|
|
|
|
export GPROMPT_LAYOUT_RIGHT=git,load
|
|
export GPROMPT_LAYOUT_THEME_OVERRIDES=bg_left:230,bg_right:230
|
|
|
|
### Main configuration
|
|
|
|
The following variables control the configuration itself:
|
|
|
|
* `cfg_warn_files` indicates that the script should emit warnings when a file
|
|
(configuration or theme) cannot be loaded due to some error (`0` or `1`,
|
|
default `1`).
|
|
* `cfg_from_env` disables or enables configuration overrides from environment
|
|
variables (`0` or `1`, default `0`).
|
|
* `cfg_sys_themes` must list system-wide directories which may contain GPrompt
|
|
themes (list; default `/usr/share/gprompt/themes`).
|
|
* `cfg_user_themes` lists directories relative to the user's home which may
|
|
contain GPrompt themes (list; default `.local/share/gprompt/themes` and
|
|
`.gprompt-themes`).
|
|
|
|
The `layout_*` variables control the prompt's layout and general appearance:
|
|
|
|
* `layout_theme` is the name of the theme to use. The default theme will be used
|
|
if it contains an empty string.
|
|
* `layout_theme_overrides` may contain local overrides to the theme's contents
|
|
(table, empty by default).
|
|
* `layout_left`, `layout_right` and `layout_input` configure the generators that
|
|
will provide the contents of the top left, top center, top right and bottom
|
|
left sections of the prompt. All 3 variables are lists of generator names; by
|
|
default, the top bar is empty (the script does not render it) and the input
|
|
prompt only uses the `userhost` and `cwd` generators, emulating a rather basic
|
|
`\u@\h:\w` prompt.
|
|
* `layout_middle` defines the generator from which the top middle section will
|
|
be displayed. Background colors emitted by the generator are ignored. By
|
|
default this entry contains an empty string.
|
|
* `layout_input_always` determines whether the input line should be rendered
|
|
even if no generators are specified (`0` or `1`, default `0`).
|
|
|
|
The `term_*` variables control the prompt's ability to change the terminal's
|
|
title and/or icon title:
|
|
|
|
* `term_set_title` controls whether the title or icon title of the terminal
|
|
should be changed. Possible values are `0` (no update), `1` (title), `2`
|
|
(icon title), and `3` (both). By default, only the title is updated.
|
|
* `term_generators` contains the list of generators that will produce the title
|
|
string (unicode characters in the generators' output will be removed).
|
|
* `term_separator` is a string that will be inserted between the various parts
|
|
of the string.
|
|
|
|
Generators also require specific configuration variables. These are documented
|
|
in the generators' sections below.
|
|
|
|
### Theme files
|
|
|
|
Themes are also stored using Perl hashes. The file containing a theme `x` should
|
|
be named `x.pm` and located in one of the configured theme directories.
|
|
|
|
The following entries are used by the script's core :
|
|
|
|
* `padding` must contain a single character which is used for padding the top
|
|
line's middle area, amongst other things.
|
|
* `transition` may contain a list of up to 8 color indices which can be used
|
|
when generating transition strings from templates.
|
|
* 5 entries control each section's appearance.
|
|
* The sections are identified by `left`, `middle`, `right` and `input` (top
|
|
left, top middle, top right and bottom left, respectively).
|
|
* Each section uses the following entries (replacing `${section}` with a
|
|
section's identifier):
|
|
* `bg_${section}` is the index of the background color of the section.
|
|
* `fg_${section}` is the index of the foreground color of the section.
|
|
* `${section}_prefix` is the template for the prefix of the section.
|
|
* `${section}_separator` is the template for the separator that is inserted
|
|
between generated areas in the section.
|
|
* `${section}_suffix` is the template for the suffix of the section.
|
|
* `bg_ps2` is the index of the background color of the secondary prompt.
|
|
* `ps2_suffix` is the template for the suffix of the secondary prompt.
|
|
|
|
Templates are strings which may contain `\bX` and `\fX` escape sequences, where
|
|
`X` is a single digit, and which modify the background or foreground colors,
|
|
respectively. Values `0` and `1` correspond to the preceding and following
|
|
background color indices, while values between `2` and `9` will refer to the
|
|
contents of the `transition` list.
|
|
|
|
In addition to the entries above, theme definitions contain entries that are
|
|
specific to the various generators. These entries are documented below.
|
|
|
|
A few special values can be used to simplify writing theme definitions.
|
|
|
|
* The `thref` function may be used to copy values from other elements in the
|
|
current theme definition, for example:
|
|
|
|
bg_left => 1 ,
|
|
bg_middle => 2 ,
|
|
bg_right => thref 'bg_left' , # Left/right always use the same bg color
|
|
|
|
* The `TERM_DEFAULT` value may be used for either background or foreground
|
|
color definitions. The terminal's default color will be used for the text in
|
|
question.
|
|
|
|
* The `SECTION_DEFAULT` value may be used in generator-specific definitions to
|
|
indicate that the current section's foreground or background color should be
|
|
used.
|
|
|
|
## Generators
|
|
|
|
### Current working directory
|
|
|
|
The `cwd` generator will output the current working directory. Its only
|
|
configuration variable, `cwd_max_width`, indicates the maximal percentage of the
|
|
terminal's width that the path may occupy before truncation occurs. The
|
|
following theme entries are required:
|
|
|
|
* `cwd_trunc` is the string that replaces the part of the path that is truncated
|
|
when it is too long compared to the terminal's width.
|
|
* `cwd_fg_color` and `cwd_bg_color` are the foreground and background color
|
|
indices for the section.
|
|
* `cwd_missing_fg_color` and `cwd_missing_bg_color` are the foreground and
|
|
background color indices that will be used if the current directory is in
|
|
fact missing.
|
|
|
|
### Date/time
|
|
|
|
The `datetime` generator will output the current date, the current time, or
|
|
both. It is controlled by the following configuration entries:
|
|
|
|
* `dt_show_date` controls whether the date should be displayed.
|
|
* `dt_show_time` controls whether the time should be displayed.
|
|
* `dt_date_fmt` is a `strftime` format that will be used for the date.
|
|
* `dt_time_fmt` is a `strftime` format that will be used for the date.
|
|
|
|
In addition, the following entries must be set in the theme:
|
|
|
|
* `dt_bg` is the background color for the section.
|
|
* `dt_time_fg` is the foreground color for the time.
|
|
* `dt_date_fg` is the foreground color for the date.
|
|
|
|
### Git information
|
|
|
|
The `git` generator is meant to display information about the Git repository the
|
|
current directory is a part of. It is controlled by the following configuration
|
|
entries:
|
|
|
|
* `git_branch_danger` is a list of branch names that will cause the current
|
|
branch to be displayed with the "danger" color set.
|
|
* `git_branch_warn` is a list of branch names that will cause the current branch
|
|
to be displayed with the "warning" color set.
|
|
* `git_detached_warning` controls the color set that will be used when the head
|
|
is detached: `0` for the normal set, `1` for the "warning" set and `2` for the
|
|
"danger" set.
|
|
* `git_show_status` controls whether the status of the current repository should
|
|
be displayed.
|
|
* `git_show_stash` controls whether the stash depth should be displayed.
|
|
|
|
The theme entries belowed control the Git information sections' appearance:
|
|
|
|
* `git_branch_symbol` is the prefix for the current branch's name.
|
|
* The color sets for the branch display section are controlled by entries named
|
|
`git_branch_${set}_fg` and `git_branch_${set}_bg`. The `${set}` must be one of
|
|
`ok`, `warn` or `danger`.
|
|
* `git_repstate_bg` / `git_repstate_fg` are the colors of the section that
|
|
indicates special states (e.g. rebase in progress, bare repository...)
|
|
* `git_status_pad` is a string that will be inserted between the various parts
|
|
of the status sections.
|
|
* Two sets of entries control the sections that correspond to untracked and
|
|
indexed changes. These sections are identified by replacing `${type}` with
|
|
either `untracked` and `indexed` in the names below.
|
|
* `git_${type}_symbol` is the prefix for the section's text,
|
|
* `git_${type}_bg` is the background color for the section,
|
|
* `git_${type}_normal_fg` is the foreground color for the normal text in the
|
|
section,
|
|
* `git_${type}_add_fg`, `git_${type}_mod_fg` and `git_${type}_del_fg` define
|
|
the foreground colors for the symbols that indicate new, modified or removed
|
|
files, respectively.
|
|
* `git_add_symbol`, `git_mod_symbol` and `git_del_symbol` define the symbols
|
|
that indicate new, modified or deleted files in the status sections.
|
|
* `git_stash_symbol` contains the prefix of the stash indicator,
|
|
* `git_stash_fg` and `git_stash_fg` define the background and foreground colors
|
|
for the stash indicator.
|
|
|
|
### System load
|
|
|
|
The `load` generator will output the system's load average for the past minute
|
|
divided by the host's processor count. It is controlled by the `load_min`
|
|
configuration entry which specifies a percentage below which the section is not
|
|
displayed at all. The following theme entries are required:
|
|
|
|
* `load_title` is a string that is prepended to the generator's output.
|
|
* `load_low_fg` and `load_low_bg` are the foreground and background colors used
|
|
when the load is beneath 34%.
|
|
* `load_med_fg` and `load_med_bg` are the foreground and background colors used
|
|
when the load is between 34% and 66%.
|
|
* `load_high_fg` and `load_high_bg` are the foreground and background colors
|
|
used when the load is higher than 66%.
|
|
|
|
### Previous command state
|
|
|
|
The `prevcmd` generator will output information about the previous command's
|
|
return value. It is controlled by the following configuration entries:
|
|
|
|
* `pcmd_show_symbol` controls whether a symbol that represents success or
|
|
failure should be displayed.
|
|
* `pcmd_show_code` controls whether the return value should be displayed. It
|
|
can be set to the usual `0` and `1` values to disable/enable, or to `2` to
|
|
enable only when the return value indicates failure.
|
|
* `pcmd_pad_code` controls padding of the return value. `0` disables padding,
|
|
`1` aligns to the left and `-1` to the right. The global padding character
|
|
is used.
|
|
* `pcmd_colors` selects which parts of the output should use the theme's success
|
|
or failure colors (`0` nothing, `1` symbol, `2` value, `3` both).
|
|
|
|
The following theme entries are needed:
|
|
|
|
* `pcmd_ok_sym` / `pcmd_err_sym` contain the symbols that represent success or
|
|
failure, respectively.
|
|
* `pcmd_ok_fg` and `pcmd_ok_bg` define the foreground and background colors used
|
|
to represent success. The foreground color may or may not be used, depending
|
|
on the configuration.
|
|
* `pcmd_err_fg` and `pcmd_err_bg` define the foreground and background colors
|
|
used to represent failure. The foreground color may or may not be used,
|
|
depending on the configuration.
|
|
* `pcmd_text_fg` controls the foreground color of the strings that are excluded
|
|
from using success/failure colors by the configuration.
|
|
|
|
### Python virtual environment
|
|
|
|
The `pyenv` generator will output the name of the currently active Python
|
|
virtual environment if there is one. The following theme entries are needed:
|
|
|
|
* `pyenv_fg` and `pyenv_bg` define the foreground and background colors for the
|
|
section.
|
|
|
|
### User/host
|
|
|
|
The `userhost` generator will output the current user and host name. It is
|
|
controlled by the following configuration entries:
|
|
|
|
* `uh_username` controls whether the user name should be displayed.
|
|
* `uh_hostname` controls whether the host name should be displayed. It can be
|
|
set to `0` (hidden), `1` (always display) or `2` (display on remote hosts
|
|
only).
|
|
* `uh_remote` can be set to `1` in order to display an additional string on
|
|
remote hosts.
|
|
|
|
In addition, the following entries must be set in the theme:
|
|
|
|
* `uh_remote_symbol` is the string to append to the section on remote hosts.
|
|
* `dt_user_fg` and `dt_user_bg` contain the foreground and background colors
|
|
to use for normal, unprivileged users.
|
|
* `dt_root_fg` and `dt_root_bg` contain the foreground and background colors
|
|
to use for the `root` account.
|