Allow configuring the FlakeHub flake name

magic-nix-cache/src/flakehub.rs

@@ -9,7 +9,6 @@ use attic_client::{
 };
 use reqwest::Url;
 use serde::Deserialize;
-use std::env;
 use std::path::Path;
 use std::str::FromStr;
 use std::sync::Arc;
@@ -29,6 +28,7 @@ pub async fn init_cache(
     flakehub_api_server: &Url,
     flakehub_api_server_netrc: &Path,
     flakehub_cache_server: &Url,
+    flakehub_flake_name: &str,
     store: Arc<NixStore>,
 ) -> Result<State> {
     // Parse netrc to get the credentials for api.flakehub.com.
@@ -93,12 +93,8 @@ pub async fn init_cache(
 
     // Get the cache UUID for this project.
     let cache_name = {
-        let github_repo = env::var("GITHUB_REPOSITORY").map_err(|_| {
-            Error::Config("GITHUB_REPOSITORY environment variable is not set".to_owned())
-        })?;
-
         let url = flakehub_api_server
-            .join(&format!("project/{}", github_repo))
+            .join(&format!("project/{}", flakehub_flake_name))
             .map_err(|_| Error::Config(format!("bad URL '{}'", flakehub_api_server)))?;
 
         let response = reqwest::Client::new()

magic-nix-cache/src/main.rs

@@ -91,6 +91,9 @@ struct Args {
     #[arg(long)]
     flakehub_cache_server: Option<reqwest::Url>,
 
+    #[arg(long)]
+    flakehub_flake_name: Option<String>,
+
     /// The location of `nix.conf`.
     #[arg(long)]
     nix_conf: PathBuf,
@@ -164,6 +167,15 @@ async fn main_cli() -> Result<()> {
         let flakehub_api_server_netrc = args
             .flakehub_api_server_netrc
             .ok_or_else(|| anyhow!("--flakehub-api-server-netrc is required"))?;
+        let flakehub_flake_name = args
+            .flakehub_flake_name
+            .ok_or_else(|| {
+                tracing::debug!(
+                    "--flakehub-flake-name was not set, inferring from $GITHUB_REPOSITORY env var"
+                );
+                std::env::var("GITHUB_REPOSITORY")
+            })
+            .map_err(|_| anyhow!("--flakehub-flake-name and $GITHUB_REPOSITORY were both unset"))?;
 
         match flakehub::init_cache(
             &args
@@ -171,6 +183,7 @@ async fn main_cli() -> Result<()> {
                 .ok_or_else(|| anyhow!("--flakehub-api-server is required"))?,
             &flakehub_api_server_netrc,
             &flakehub_cache_server,
+            &flakehub_flake_name,
             store.clone(),
         )
         .await