Rename check prefixes to ofborg

* If the sha we're operating on already has checks beginning with the old
`grahamcofborg-` prefix (e.g. someone just used `@ofborg eval`, `@ofborg build`,
or `@ofborg test`), continue using that prefix.

* If the sha we're operating on doesn't have any checks beginning with the old
`grahamcofborg-` prefix, use the new `ofborg-` prefix. This will take effect on
all new PRs immediately, and after a force-push for all existing PRs.

ofborg/src/evalchecker.rs

@@ -20,8 +20,8 @@ impl EvalChecker {
         }
     }
 
-    pub fn name(&self) -> String {
-        format!("grahamcofborg-eval-{}", self.name)
+    pub fn name(&self) -> &str {
+        &self.name
     }
 
     pub fn execute(&self, path: &Path) -> Result<File, File> {

ofborg/src/tasks/eval/nixpkgs.rs

@@ -14,7 +14,7 @@ use crate::tagger::{
 use crate::tasks::eval::{
     stdenvs::Stdenvs, Error, EvaluationComplete, EvaluationStrategy, StepResult,
 };
-use crate::tasks::evaluate::{make_gist, update_labels};
+use crate::tasks::evaluate::{get_prefix, make_gist, update_labels};
 
 use std::collections::HashMap;
 use std::path::Path;
@@ -272,6 +272,8 @@ impl<'a> NixpkgsStrategy<'a> {
                 },
             );
 
+            let prefix = get_prefix(self.repo.statuses(), &self.job.pr.head_sha)?;
+
             if changed_paths.len() > MAINTAINER_REVIEW_MAX_CHANGED_PATHS {
                 info!(
                     "pull request has {} changed paths, skipping review requests",
@@ -280,7 +282,7 @@ impl<'a> NixpkgsStrategy<'a> {
                 let status = CommitStatus::new(
                     self.repo.statuses(),
                     self.job.pr.head_sha.clone(),
-                    String::from("grahamcofborg-eval-check-maintainers"),
+                    format!("{}-eval-check-maintainers", prefix),
                     String::from("large change, skipping automatic review requests"),
                     gist_url,
                 );
@@ -291,7 +293,7 @@ impl<'a> NixpkgsStrategy<'a> {
             let status = CommitStatus::new(
                 self.repo.statuses(),
                 self.job.pr.head_sha.clone(),
-                String::from("grahamcofborg-eval-check-maintainers"),
+                format!("{}-eval-check-maintainers", prefix),
                 String::from("matching changed paths to changed attrs..."),
                 gist_url,
             );
@@ -315,10 +317,12 @@ impl<'a> NixpkgsStrategy<'a> {
 
     fn check_meta_queue_builds(&self, dir: &Path) -> StepResult<Vec<BuildJob>> {
         if let Some(ref possibly_touched_packages) = self.touched_packages {
+            let prefix = get_prefix(self.repo.statuses(), &self.job.pr.head_sha)?;
+
             let mut status = CommitStatus::new(
                 self.repo.statuses(),
                 self.job.pr.head_sha.clone(),
-                String::from("grahamcofborg-eval-check-meta"),
+                format!("{}-eval-check-meta", prefix),
                 String::from("config.nix: checkMeta = true"),
                 None,
             );

ofborg/src/tasks/evaluate.rs

@@ -186,9 +186,13 @@ impl<'a, E: stats::SysEvents + 'static> OneEval<'a, E> {
         } else {
             description
         };
+        let repo = self
+            .client_app
+            .repo(self.job.repo.owner.clone(), self.job.repo.name.clone());
+        let prefix = get_prefix(repo.statuses(), &self.job.pr.head_sha)?;
 
         let mut builder = hubcaps::statuses::StatusOptions::builder(state);
-        builder.context("grahamcofborg-eval");
+        builder.context(format!("{}-eval", prefix));
         builder.description(description.clone());
 
         if let Some(url) = url {
@@ -322,10 +326,12 @@ impl<'a, E: stats::SysEvents + 'static> OneEval<'a, E> {
             Box::new(eval::GenericStrategy::new())
         };
 
+        let prefix = get_prefix(repo.statuses(), &job.pr.head_sha)?;
+
         let mut overall_status = CommitStatus::new(
             repo.statuses(),
             job.pr.head_sha.clone(),
-            "grahamcofborg-eval".to_owned(),
+            format!("{}-eval", &prefix),
             "Starting".to_owned(),
             None,
         );
@@ -422,7 +428,7 @@ impl<'a, E: stats::SysEvents + 'static> OneEval<'a, E> {
                 let mut status = CommitStatus::new(
                     repo.statuses(),
                     job.pr.head_sha.clone(),
-                    check.name(),
+                    format!("{}-eval-{}", prefix, check.name()),
                     check.cli_cmd(),
                     None,
                 );
@@ -441,7 +447,7 @@ impl<'a, E: stats::SysEvents + 'static> OneEval<'a, E> {
                     Err(mut out) => {
                         state = hubcaps::statuses::State::Failure;
                         gist_url = self.make_gist(
-                            &check.name(),
+                            &format!("{}-eval-{}", prefix, check.name()),
                             Some(format!("{:?}", state)),
                             file_to_str(&mut out),
                         );
@@ -618,6 +624,28 @@ fn indicates_wip(text: &str) -> bool {
     false
 }
 
+/// Determine whether or not to use the "old" status prefix, `grahamcofborg`, or
+/// the new one, `ofborg`.
+///
+/// If the PR already has any `grahamcofborg`-prefixed statuses, continue to use
+/// that (e.g. if someone used `@ofborg eval`, `@ofborg build`, `@ofborg test`).
+/// Otherwise, if it's a new PR or was recently force-pushed (and therefore
+/// doesn't have any old `grahamcofborg`-prefixed statuses), use the new prefix.
+pub fn get_prefix<'a>(
+    statuses: hubcaps::statuses::Statuses,
+    sha: &'a str,
+) -> Result<&'a str, CommitStatusError> {
+    if statuses
+        .list(&sha)?
+        .iter()
+        .any(|s| s.context.starts_with("grahamcofborg-"))
+    {
+        Ok("grahamcofborg")
+    } else {
+        Ok("ofborg")
+    }
+}
+
 enum EvalWorkerError {
     EvalError(eval::Error),
     CommitStatusWrite(CommitStatusError),