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starship
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feat(env_var): allow multiple instances (#2797) 

Allows displaying multiple instances of the env_var module.
This commit is contained in:
filip 2021-07-14 00:06:08 +03:00 committed by GitHub
parent c9249dbe0b
commit 88ed0ed45a
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6 changed files with 128 additions and 23 deletions
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26
docs/config/README.md
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@ -977,12 +977,25 @@ format = "via [ $version](cyan bold) "
## Environment Variable
The `env_var` module displays the current value of a selected environment variable.
The `env_var` module displays the current value of a selected environment variables.
The module will be shown only if any of the following conditions are met:
- The `variable` configuration option matches an existing environment variable
- The `variable` configuration option is not defined, but the `default` configuration option is
::: tip
Multiple environmental variables can be displayed by using a `.`. (see example)
If the `variable` configuration option is not set, the module will display value of variable under the name of text after the `.` character.
Example: following configuration will display value of USER environment variable
```toml
# ~/.config/starship.toml
[env_var.USER]
default = "unknown user"
```
### Options
| Option | Default | Description |
@ -1013,6 +1026,17 @@ variable = "SHELL"
default = "unknown shell"
```
Displaying multiple environmental variables:
```toml
# ~/.config/starship.toml
[env_var.SHELL]
variable = "SHELL"
default = "unknown shell"
[env_var.USER]
default = "unknown user"
```
## Erlang
The `erlang` module shows the currently installed version of [Erlang/OTP](https://erlang.org/doc/).

4
src/config.rs
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@ -342,6 +342,10 @@ impl StarshipConfig {
pub fn get_custom_modules(&self) -> Option<&toml::value::Table> {
self.get_config(&["custom"])?.as_table()
}
/// Get the table of all the registered env_var modules, if any
pub fn get_env_var_modules(&self) -> Option<&toml::value::Table> {
self.get_config(&["env_var"])?.as_table()
}
pub fn get_root_config(&self) -> StarshipRootConfig {
if let Some(root_config) = &self.config {

2
src/configs/mod.rs
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@ -91,7 +91,7 @@ pub struct FullConfig<'a> {
dotnet: dotnet::DotnetConfig<'a>,
elixir: elixir::ElixirConfig<'a>,
elm: elm::ElmConfig<'a>,
env_var: env_var::EnvVarConfig<'a>,
env_var: IndexMap<String, env_var::EnvVarConfig<'a>>,
erlang: erlang::ErlangConfig<'a>,
gcloud: gcloud::GcloudConfig<'a>,
git_branch: git_branch::GitBranchConfig<'a>,

6
src/configs/starship_root.rs
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@ -105,7 +105,10 @@ impl<'a> ModuleConfig<'a> for StarshipRootConfig<'a> {
"command_timeout" => self.command_timeout.load_config(v),
"add_newline" => self.add_newline.load_config(v),
unknown => {
if !ALL_MODULES.contains(&unknown) && unknown != "custom" {
if !ALL_MODULES.contains(&unknown)
&& unknown != "custom"
&& unknown != "env_var"
{
log::warn!("Unknown config key '{}'", unknown);
let did_you_mean = &[
@ -116,6 +119,7 @@ impl<'a> ModuleConfig<'a> for StarshipRootConfig<'a> {
"add_newline",
// Modules
"custom",
"env_var",
]
.iter()
.chain(ALL_MODULES.iter())

112
src/modules/env_var.rs
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@ -3,6 +3,36 @@ use super::{Context, Module};
use crate::config::RootModuleConfig;
use crate::configs::env_var::EnvVarConfig;
use crate::formatter::StringFormatter;
use crate::segment::Segment;
/// Creates env_var_module displayer which displays all configured environmental variables
pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
let config_table = context.config.get_env_var_modules()?;
let mut env_modules = config_table
.iter()
.filter(|(_, config)| config.is_table())
.filter_map(|(variable, _)| env_var_module(vec!["env_var", variable], context))
.collect::<Vec<Module>>();
// Old configuration is present in starship configuration
if config_table.iter().any(|(_, config)| !config.is_table()) {
if let Some(fallback_env_var_module) = env_var_module(vec!["env_var"], context) {
env_modules.push(fallback_env_var_module);
}
}
Some(env_var_displayer(env_modules, context))
}
/// A utility module to display multiple env_variable modules
fn env_var_displayer<'a>(modules: Vec<Module>, context: &'a Context) -> Module<'a> {
let mut module = context.new_module("env_var_displayer");
let module_segments = modules
.into_iter()
.flat_map(|module| module.segments)
.collect::<Vec<Segment>>();
module.set_segments(module_segments);
module
}
/// Creates a module with the value of the chosen environment variable
///
@ -10,11 +40,20 @@ use crate::formatter::StringFormatter;
/// - env_var.disabled is absent or false
/// - env_var.variable is defined
/// - a variable named as the value of env_var.variable is defined
pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
let mut module = context.new_module("env_var");
let config: EnvVarConfig = EnvVarConfig::try_load(module.config);
fn env_var_module<'a>(module_config_path: Vec<&str>, context: &'a Context) -> Option<Module<'a>> {
let mut module = context.new_module(&module_config_path.join("."));
let config_value = context.config.get_config(&module_config_path);
let config = EnvVarConfig::load(config_value.expect(
"modules::env_var::module should only be called after ensuring that the module exists",
));
let env_value = get_env_value(context, config.variable?, config.default)?;
if config.disabled {
return None;
};
let variable_name = get_variable_name(module_config_path, &config);
let env_value = get_env_value(context, variable_name?, config.default)?;
let parsed = StringFormatter::new(config.format).and_then(|formatter| {
formatter
.map_meta(|var, _| match var {
@ -43,6 +82,19 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
Some(module)
}
fn get_variable_name<'a>(
module_config_path: Vec<&'a str>,
config: &'a EnvVarConfig,
) -> Option<&'a str> {
match config.variable {
Some(v) => Some(v),
None => {
let last_element = module_config_path.last()?;
Some(*last_element)
}
}
}
fn get_env_value(context: &Context, name: &str, default: Option<&str>) -> Option<String> {
match context.get_env(name) {
Some(value) => Some(value),
@ -59,12 +111,22 @@ mod test {
#[test]
fn empty_config() {
let actual = ModuleRenderer::new("env_var").collect();
let expected = None;
assert_eq!(expected, actual);
}
#[test]
fn fallback_config() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable="TEST_VAR"
})
.env("TEST_VAR", TEST_VAR_VALUE)
.collect();
let expected = None;
let expected = Some(format!("with {} ", style().paint(TEST_VAR_VALUE)));
assert_eq!(expected, actual);
}
@ -73,8 +135,7 @@ mod test {
fn defined_variable() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
[env_var.TEST_VAR]
})
.env("TEST_VAR", TEST_VAR_VALUE)
.collect();
@ -87,8 +148,7 @@ mod test {
fn undefined_variable() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
[env_var.TEST_VAR]
})
.collect();
let expected = None;
@ -100,8 +160,7 @@ mod test {
fn default_has_no_effect() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
[env_var.TEST_VAR]
default = "N/A"
})
.env("TEST_VAR", TEST_VAR_VALUE)
@ -115,8 +174,7 @@ mod test {
fn default_takes_effect() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "UNDEFINED_TEST_VAR"
[env_var.UNDEFINED_TEST_VAR]
default = "N/A"
})
.collect();
@ -129,8 +187,7 @@ mod test {
fn symbol() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
[env_var.TEST_VAR]
format = "with [■ $env_value](black bold dimmed) "
})
.env("TEST_VAR", TEST_VAR_VALUE)
@ -147,8 +204,7 @@ mod test {
fn prefix() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
[env_var.TEST_VAR]
format = "with [_$env_value](black bold dimmed) "
})
.env("TEST_VAR", TEST_VAR_VALUE)
@ -165,8 +221,7 @@ mod test {
fn suffix() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
[env_var.TEST_VAR]
format = "with [${env_value}_](black bold dimmed) "
})
.env("TEST_VAR", TEST_VAR_VALUE)
@ -179,6 +234,25 @@ mod test {
assert_eq!(expected, actual);
}
#[test]
fn display_few() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var.TEST_VAR]
[env_var.TEST_VAR2]
})
.env("TEST_VAR", TEST_VAR_VALUE)
.env("TEST_VAR2", TEST_VAR_VALUE)
.collect();
let expected = Some(format!(
"with {} with {} ",
style().paint(TEST_VAR_VALUE),
style().paint(TEST_VAR_VALUE)
));
assert_eq!(expected, actual);
}
fn style() -> Style {
// default style
Color::Black.bold().dimmed()

1
src/modules/mod.rs
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@ -75,7 +75,6 @@ use std::time::Instant;
pub fn handle<'a>(module: &str, context: &'a Context) -> Option<Module<'a>> {
let start: Instant = Instant::now();
let mut m: Option<Module> = {
match module {
// Keep these ordered alphabetically.