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use std::collections::HashMap;
#[derive(Debug, Clone)]
#[cfg_attr(feature = "manifest", derive(serde::Serialize, serde::Deserialize))]
pub struct HostManifest {
pub actors: Vec<String>,
pub capabilities: Vec<Capability>,
pub bindings: Vec<BindingEntry>,
}
#[derive(Debug, Clone)]
#[cfg_attr(feature = "manifest", derive(serde::Serialize, serde::Deserialize))]
pub struct Capability {
pub path: String,
pub binding_name: Option<String>,
}
#[derive(Debug, Clone)]
#[cfg_attr(feature = "manifest", derive(serde::Serialize, serde::Deserialize))]
pub struct BindingEntry {
pub actor: String,
pub capability: String,
pub binding: Option<String>,
pub values: Option<HashMap<String, String>>,
}
#[cfg(feature = "manifest")]
use std::{fs::File, io::Read, path::Path};
#[cfg(feature = "manifest")]
impl HostManifest {
pub fn from_yaml(
path: impl AsRef<Path>,
expand_env: bool,
) -> ::std::result::Result<HostManifest, Box<dyn std::error::Error>> {
let mut contents = String::new();
let mut file = File::open(path)?;
file.read_to_string(&mut contents)?;
if expand_env {
contents = Self::expand_env(&contents);
}
match serde_yaml::from_str::<HostManifest>(&contents) {
Ok(m) => Ok(m),
Err(e) => Err(format!("Failed to deserialize yaml: {} ", e).into()),
}
}
pub fn from_json(
path: impl AsRef<Path>,
expand_env: bool,
) -> ::std::result::Result<HostManifest, Box<dyn std::error::Error>> {
let mut contents = String::new();
let mut file = File::open(path)?;
file.read_to_string(&mut contents)?;
if expand_env {
contents = Self::expand_env(&contents);
}
match serde_json::from_str::<HostManifest>(&contents) {
Ok(m) => Ok(m),
Err(_) => Err("Failed to deserialize json".into()),
}
}
fn expand_env(contents: &str) -> String {
let mut options = envmnt::ExpandOptions::new();
options.default_to_empty = false;
options.expansion_type = Some(envmnt::ExpansionType::UnixBracketsWithDefaults);
envmnt::expand(contents, Some(options))
}
}
#[cfg(feature = "manifest")]
#[cfg(test)]
mod test {
use super::{BindingEntry, Capability};
use std::collections::HashMap;
#[test]
fn round_trip() {
let manifest = super::HostManifest {
actors: vec!["a".to_string(), "b".to_string(), "c".to_string()],
capabilities: vec![
Capability {
path: "one".to_string(),
binding_name: Some("default".to_string()),
},
Capability {
path: "two".to_string(),
binding_name: Some("default".to_string()),
},
],
bindings: vec![BindingEntry {
actor: "a".to_string(),
binding: Some("default".to_string()),
capability: "wascc:one".to_string(),
values: Some(gen_values()),
}],
};
let yaml = serde_yaml::to_string(&manifest).unwrap();
assert_eq!(yaml, "---\nactors:\n - a\n - b\n - c\ncapabilities:\n - path: one\n binding_name: default\n - path: two\n binding_name: default\nbindings:\n - actor: a\n capability: \"wascc:one\"\n binding: default\n values:\n ROOT: /tmp");
}
#[test]
fn env_expansion() {
let values = vec![
"echo Test",
"echo $TEST_EXPAND_ENV_TEMP",
"echo ${TEST_EXPAND_ENV_TEMP}",
"echo ${TEST_EXPAND_ENV_TMP}",
"echo ${TEST_EXPAND_ENV_TEMP:/etc}",
"echo ${TEST_EXPAND_ENV_TMP:/etc}",
];
let expected = vec![
"echo Test",
"echo $TEST_EXPAND_ENV_TEMP",
"echo /tmp",
"echo ${TEST_EXPAND_ENV_TMP}",
"echo /tmp",
"echo /etc",
];
envmnt::set("TEST_EXPAND_ENV_TEMP", "/tmp");
for (got, expected) in values
.iter()
.map(|v| super::HostManifest::expand_env(v))
.zip(expected.iter())
{
assert_eq!(*expected, got);
}
envmnt::remove("TEST_EXPAND_ENV_TEMP");
}
fn gen_values() -> HashMap<String, String> {
let mut hm = HashMap::new();
hm.insert("ROOT".to_string(), "/tmp".to_string());
hm
}
}