minimal version only returns environment data

Signed-off-by: Jochen maes <jochen@sejo-it.be>

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.lock

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Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "mouse"
+authors = ["Jochen Maes <jochen@sejo-it.be>"]
+description = "Information gatherer for systems."
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = { version = "4.4.6", features = ["derive"] }
+csv = "1.3.0"
+serde = { version = "1.0.189", features = ["std", "derive"] }
+serde_json = "1.0.107"
+serde_yaml = "0.9.25"

src/gatherers/environment.rs

@@ -0,0 +1,23 @@
+use crate::types::{fact::{Fact, FactData}};
+use std::env;
+
+pub struct EnvironmentData {}
+
+impl EnvironmentData {
+}
+
+impl Fact for EnvironmentData {
+    fn gather(&self) -> Vec<FactData>{
+        let mut vfd: Vec<FactData> = vec![];
+        let time_set = self.get_epoch_ms();
+        for (key, value) in env::vars() {
+            let fd =  FactData{
+                name: String::from("env_") + &key,
+                value: value,
+                time_set: time_set
+            };
+            vfd.push(fd);
+        }
+        return vfd;
+    }
+}

src/gatherers/mod.rs

@@ -0,0 +1 @@
+pub mod environment;

src/main.rs

@@ -0,0 +1,82 @@
+mod types;
+mod gatherers;
+
+use std::collections::HashSet; 
+use crate::types::fact::{Fact, FactData};
+use crate::gatherers::environment::EnvironmentData;
+use clap::Parser;
+use csv::{ Writer};
+
+
+#[derive(Parser)]
+#[clap(author, version, about, long_about = None)]
+struct Args {
+    /// Specific gatherer you wish to run, defaults to all
+    #[arg(short, long)]
+    gatherer: Option<Vec<String>>,
+    /// Output format, yaml, json are supported
+    #[arg(short, long, default_value="yaml")]
+    output: String,
+}
+
+fn gather_all() -> Vec<FactData>{
+    let mut data: Vec<FactData> = vec![];
+    data.append(&mut gather(&EnvironmentData{}));
+    return data;
+}
+
+fn gather_list(gatherers: HashSet<String>) -> Vec<FactData> {
+    let mut data: Vec<FactData> = vec![];
+    for g in gatherers {
+        match g.as_str() {
+            "all" => for d in gather_all(){
+                data.push(d);
+            },
+            "env" => for d in gather(&EnvironmentData{}) {
+                data.push(d); 
+            },
+            _ => for d in gather_all() {
+                data.push(d);
+            }      
+        };
+    }
+    return data;
+}
+fn gather (t: &dyn Fact) -> Vec<FactData> {
+    return t.gather();
+}
+fn main() {
+    let args = Args::parse();
+    let mut data:Vec<FactData> = vec![];
+
+    if !args.gatherer.is_some() {
+        data.append(&mut gather_all());
+    } else {
+        // sanitize the gatherer list
+        let ugatherers: HashSet<String> = match &args.gatherer {
+            Some(x) => x.into_iter().map(|name| name).cloned().collect::<HashSet<String>>(),
+            None => HashSet::<String>::new(),
+        };
+        data.append(&mut gather_list(ugatherers));
+       }
+    println!("got here: {}", data.len());
+
+
+    match args.output.as_str() {
+        "json" => {
+            let serialized_json = serde_json::to_string(&data).unwrap();
+            println!("{}", serialized_json);
+        },
+        "csv" => {
+            let mut writer = Writer::from_writer(vec![]);
+            for fd in data {
+                writer.serialize(fd).unwrap();
+            }
+            println!("{}", String::from_utf8(writer.into_inner().unwrap()).unwrap());
+        }
+        &_ =>  {
+            let serialized_yaml = serde_yaml::to_string(&data).unwrap();
+            println!("{}", serialized_yaml);
+        },
+    };
+}

src/types/fact.rs

@@ -0,0 +1,20 @@
+use std::time::{UNIX_EPOCH, SystemTime};
+use serde::{Serialize, Deserialize};
+
+#[derive(Serialize, Deserialize)]
+pub struct FactData {
+    pub name: String,
+    pub value: String,
+    pub time_set: u128, 
+}
+
+pub trait Fact : Send + Sync {
+    fn gather(&self) -> Vec<FactData>;
+
+    fn get_epoch_ms(&self) -> u128 {
+    SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap()
+        .as_millis()
+    }
+}

src/types/mod.rs

@@ -0,0 +1 @@
+pub mod fact;