test stdenv rebuild skipping

ofborg/src/tasks/build.rs

@@ -452,6 +452,21 @@ mod tests {
         hash.trim().to_owned()
     }
 
+    fn make_stdenv_pr_repo(bare: &Path, co: &Path) -> String {
+        let output = Command::new("bash")
+            .current_dir(tpath("./test-srcs"))
+            .arg("make-stdenv-pr.sh")
+            .arg(bare)
+            .arg(co)
+            .stderr(Stdio::null())
+            .stdout(Stdio::piped())
+            .output()
+            .expect("building the test PR failed");
+        let hash = String::from_utf8(output.stdout).expect("Should just be a hash");
+
+        hash.trim().to_owned()
+    }
+
     fn strip_escaped_ansi(string: &str) -> String {
         string
             .replace("‘", "'")
@@ -532,6 +547,45 @@ mod tests {
         assert_eq!(actions.next(), Some(worker::Action::Ack));
     }
 
+    #[test]
+    pub fn test_stdenv_rebuild() {
+        let p = TestScratch::new_dir("build-stdenv-build-working");
+        let bare_repo = TestScratch::new_dir("build-stdenv-build-bare");
+        let co_repo = TestScratch::new_dir("build-stdenv-build-co");
+
+        let head_sha = make_stdenv_pr_repo(&bare_repo.path(), &co_repo.path());
+        let worker = make_worker(&p.path());
+
+        let job = buildjob::BuildJob {
+            attrs: vec!["success".to_owned()],
+            pr: Pr {
+                head_sha,
+                number: 1,
+                target_branch: Some("staging".to_owned()),
+            },
+            repo: Repo {
+                clone_url: bare_repo.path().to_str().unwrap().to_owned(),
+                full_name: "test-git".to_owned(),
+                name: "nixos".to_owned(),
+                owner: "ofborg-test".to_owned(),
+            },
+            subset: None,
+            logs: Some((Some(String::from("logs")), Some(String::from("build.log")))),
+            statusreport: Some((Some(String::from("build-results")), None)),
+            request_id: "bogus-request-id".to_owned(),
+        };
+
+        let mut dummyreceiver = notifyworker::DummyNotificationReceiver::new();
+
+        worker.consumer(&job, &mut dummyreceiver);
+
+        println!("Total actions: {:?}", dummyreceiver.actions.len());
+        let mut actions = dummyreceiver.actions.into_iter();
+        assert_contains_job(&mut actions, "skipped_attrs\":[\"success"); // First one to the github poster
+        assert_contains_job(&mut actions, "skipped_attrs\":[\"success"); // This one to the logs
+        assert_eq!(actions.next(), Some(worker::Action::Ack));
+    }
+
     #[test]
     pub fn test_all_jobs_skipped() {
         let p = TestScratch::new_dir("no-attempt");

ofborg/test-srcs/build-pr/default.nix

@@ -2,6 +2,11 @@ let
   builder = builtins.storePath <ofborg-test-bash>;
 in
 {
+  stdenv = import <nix/fetchurl.nix> {
+    url = "http://tarballs.nixos.org/stdenv-linux/x86_64/c5aabb0d603e2c1ea05f5a93b3be82437f5ebf31/bootstrap-tools.tar.xz";
+    sha256 = "a5ce9c155ed09397614646c9717fc7cd94b1023d7b76b618d409e4fefd6e9d39";
+  };
+
   success = derivation {
     name = "success";
     system = builtins.currentSystem;

ofborg/test-srcs/build/default.nix

@@ -2,6 +2,11 @@ let
   builder = builtins.storePath <ofborg-test-bash>;
 in
 {
+  stdenv = import <nix/fetchurl.nix> {
+    url = "http://tarballs.nixos.org/stdenv-linux/x86_64/c5aabb0d603e2c1ea05f5a93b3be82437f5ebf31/bootstrap-tools.tar.xz";
+    sha256 = "a5ce9c155ed09397614646c9717fc7cd94b1023d7b76b618d409e4fefd6e9d39";
+  };
+
   success = derivation {
     name = "success";
     system = builtins.currentSystem;

ofborg/test-srcs/make-stdenv-pr.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -eu
+
+bare=$1
+co=$2
+
+makepr() {
+    git init --bare "$bare"
+    git clone "$bare" "$co"
+    git -C "$co" commit --no-gpg-sign --author "GrahamCOfBorg <graham+cofborg@example.com>" --allow-empty -m "empty master commit"
+    git -C "$co" push origin master
+
+    cp build/* "$co/"
+    git -C "$co" add .
+    git -C "$co" checkout -B staging
+    git -C "$co" commit --no-gpg-sign --author "GrahamCOfBorg <graham+cofborg@example.com>" -m "initial repo commit"
+    git -C "$co" push origin staging
+
+    cp stdenv-pr/*  "$co/"
+    git -C "$co" checkout -b my-cool-pr
+    git -C "$co" add .
+    git -C "$co" commit --no-gpg-sign --author "GrahamCOfBorg <graham+cofborg@example.com>" -m "check out this cool PR"
+    git -C "$co" push origin my-cool-pr:refs/pull/1/head
+}
+
+makepr >&2
+git -C "$co" rev-parse HEAD

ofborg/test-srcs/stdenv-pr/default.nix

@@ -0,0 +1,16 @@
+let
+  builder = builtins.storePath <ofborg-test-bash>;
+in
+{
+  stdenv = import <nix/fetchurl.nix> {
+    url = "http://tarballs.nixos.org/stdenv-linux/x86_64/c5aabb0d603e2c1ea05f5a93b3be82437f5ebf31/bootstrap-tools.tar.xz";
+    sha256 = "0000000000000000000000000000000000000000000000000000000000000000";
+  };
+
+  success = derivation {
+    name = "success";
+    system = builtins.currentSystem;
+    inherit builder;
+    args = [ "-c" "echo hi; printf '1\n2\n3\n4\n'; echo ${toString builtins.currentTime} > $out" ];
+  };
+}