feat: check env vars are all set

Cargo.toml

@@ -5,3 +5,4 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1.0"
+regex = "1.10"

src/main.rs

@@ -1,6 +1,23 @@
+use anyhow::Context;
+
 fn main() -> anyhow::Result<()> {
     println!("Forgejo TODO Checker!");
 
+    let ci_repo = std::env::var("CI_REPO").context("CI_REPO")?;
+    let ci_repo_url = std::env::var("CI_REPO_URL").context("CI_REPO_URL")?;
+    let ci_forge_type = std::env::var("CI_FORGE_TYPE").context("CI_FORGE_TYPE")?;
+
+    // optional arg for private repos
+    let repo_token = std::env::var("REPO_TOKEN").ok();
+
+    // Regex to match a todo or fixme comment
+    let prefix = regex::Regex::new(r"(#|//)\s*(TODO|FIXME)").context("prefix regex")?;
+    // Regex to match the rest of the line to find an issue number
+    let issue =
+        regex::Regex::new(r"( |)(\(|\(#)(?P<ISSUE_NUMBER>\d+)(\))").context("issue regex")?;
+
+    println!("[ci_repo:{ci_repo}][ci_repo_url:{ci_repo_url}][ci_forge_type:{ci_forge_type}][repo_token:{repo_token:?}][prefix:{prefix}][issue:{issue}]");
+
     // list files in current directory to get a feel for what we have access to
     std::fs::read_dir(".")?
         .filter_map(Result::ok)