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|
use dirs;
use yaml_rust::YamlLoader;
use std::env;
use std::path;
use super::{Context, Module, RootModuleConfig};
use crate::configs::kubernetes::KubernetesConfig;
use crate::utils;
const KUBERNETES_PREFIX: &str = "on ";
fn get_kube_context(contents: &str) -> Option<(String, String)> {
let yaml_docs = YamlLoader::load_from_str(&contents).ok()?;
if yaml_docs.is_empty() {
return None;
}
let conf = &yaml_docs[0];
let current_ctx = conf["current-context"].as_str()?;
if current_ctx.is_empty() {
return None;
}
let ns = conf["contexts"]
.as_vec()
.and_then(|contexts| {
contexts
.iter()
.filter_map(|ctx| Some((ctx, ctx["name"].as_str()?)))
.find(|(_, name)| *name == current_ctx)
.and_then(|(ctx, _)| ctx["context"]["namespace"].as_str())
})
.unwrap_or("");
Some((current_ctx.to_string(), ns.to_string()))
}
fn parse_kubectl_file(filename: &path::PathBuf) -> Option<(String, String)> {
let contents = utils::read_file(filename).ok()?;
get_kube_context(&contents)
}
pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
let kube_cfg = match env::var("KUBECONFIG") {
Ok(paths) => env::split_paths(&paths)
.filter_map(|filename| parse_kubectl_file(&filename))
.nth(0),
Err(_) => {
let filename = dirs::home_dir()?.join(".kube").join("config");
parse_kubectl_file(&filename)
}
};
match kube_cfg {
Some(kube_cfg) => {
let (kube_ctx, kube_ns) = kube_cfg;
let mut module = context.new_module("kubernetes");
let config: KubernetesConfig = KubernetesConfig::try_load(module.config);
if config.disabled {
return None;
};
module.set_style(config.style);
module.get_prefix().set_value(KUBERNETES_PREFIX);
module.create_segment("symbol", &config.symbol);
module.create_segment("context", &config.context.with_value(&kube_ctx));
if kube_ns != "" {
module.create_segment(
"namespace",
&config.namespace.with_value(&format!(" ({})", kube_ns)),
);
}
Some(module)
}
None => None,
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn parse_empty_config() {
let input = "";
let result = get_kube_context(&input);
let expected = None;
assert_eq!(result, expected);
}
#[test]
fn parse_no_config() {
let input = r#"
apiVersion: v1
clusters: []
contexts: []
current-context: ""
kind: Config
preferences: {}
users: []
"#;
let result = get_kube_context(&input);
let expected = None;
assert_eq!(result, expected);
}
#[test]
fn parse_only_context() {
let input = r#"
apiVersion: v1
clusters: []
contexts:
- context:
cluster: test_cluster
user: test_user
name: test_context
current-context: test_context
kind: Config
preferences: {}
users: []
"#;
let result = get_kube_context(&input);
let expected = Some(("test_context".to_string(), "".to_string()));
assert_eq!(result, expected);
}
#[test]
fn parse_context_and_ns() {
let input = r#"
apiVersion: v1
clusters: []
contexts:
- context:
cluster: test_cluster
user: test_user
namespace: test_namespace
name: test_context
current-context: test_context
kind: Config
preferences: {}
users: []
"#;
let result = get_kube_context(&input);
let expected = Some(("test_context".to_string(), "test_namespace".to_string()));
assert_eq!(result, expected);
}
#[test]
fn parse_multiple_contexts() {
let input = r#"
apiVersion: v1
clusters: []
contexts:
- context:
cluster: another_cluster
user: another_user
namespace: another_namespace
name: another_context
- context:
cluster: test_cluster
user: test_user
namespace: test_namespace
name: test_context
current-context: test_context
kind: Config
preferences: {}
users: []
"#;
let result = get_kube_context(&input);
let expected = Some(("test_context".to_string(), "test_namespace".to_string()));
assert_eq!(result, expected);
}
#[test]
fn parse_broken_config() {
let input = r#"
---
dummy_string
"#;
let result = get_kube_context(&input);
let expected = None;
assert_eq!(result, expected);
}
}
|
