Add more metadata; render README.md with Rust (#43)

.github/workflows/render.yml

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+name: Render
+
+on:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      # Give the default GITHUB_TOKEN write permission to commit and push the
+      # added or changed files to the repository.
+      contents: write
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Render list
+        run: make render
+
+      - uses: stefanzweifel/git-auto-commit-action@v5.0.0
+        if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+        with:
+          commit_message: Commit list
+          commit_user_name: Idiomatic Rust Bot
+          commit_user_email: bot@idiomatic.rs
+          commit_author: Idiomatic Rust Bot <bot@idiomatic.rs>

Makefile

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+.PHONY: render
+render:
+	cargo run --manifest-path=render/Cargo.toml

render/.gitignore

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+target/

render/Cargo.toml

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+[package]
+name = "render"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+askama = "0.12.1"
+indexmap = "2.2.1"
+itertools = "0.12.1"
+serde = { version = "1.0.196", features = ["serde_derive"] }
+serde_json = "1.0.113"

render/src/main.rs

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+use std::fs;
+
+use askama::Template;
+use indexmap::IndexMap;
+use itertools::Itertools;
+use serde::{Deserialize, Serialize};
+
+#[derive(Template)]
+#[template(path = "README.md")]
+struct ReadmeTemplate {
+    projects: Vec<Resource>,
+    workshops: Vec<Resource>,
+    books: Vec<Resource>,
+    articles: YearMap,
+    talks: YearMap,
+    forum: YearMap,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+struct Resource {
+    title: String,
+    url: String,
+    description: String,
+    tags: Vec<String>,
+    official: bool,
+    year: usize,
+    #[serde(rename = "difficultyLevel")]
+    difficulty_level: String,
+    duration: Option<String>,
+    #[serde(rename = "interactivityLevel")]
+    interactivity_level: String,
+    free: bool,
+    category: String,
+}
+
+type Resources = Vec<Resource>;
+
+type YearMap = IndexMap<usize, Resources>;
+
+fn group_by_year(resources: &Resources, category: &str) -> YearMap {
+    resources
+        .iter()
+        .filter(|r| r.category == category)
+        .sorted_by_key(|r| r.year)
+        .rev()
+        .fold(YearMap::new(), |mut map, r| {
+            map.entry(r.year).or_insert_with(Vec::new).push(r.clone());
+            map
+        })
+}
+
+fn sort_by_title(resources: &Resources, category: &str) -> Resources {
+    resources
+        .iter()
+        .filter(|r| r.category == category)
+        .sorted_by_key(|r| r.title.to_lowercase())
+        .cloned()
+        .collect()
+}
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let file = std::fs::File::open("resources.json")?;
+    let resources: Resources = serde_json::from_reader(file)?;
+
+    let readme = ReadmeTemplate {
+        projects: sort_by_title(&resources, "project"),
+        workshops: sort_by_title(&resources, "workshop"),
+        books: sort_by_title(&resources, "book"),
+        articles: group_by_year(&resources, "article"),
+        talks: group_by_year(&resources, "talk"),
+        forum: group_by_year(&resources, "forum"),
+    };
+
+    fs::write("README.md", readme.render()?)?;
+
+    Ok(())
+}