test(itest): add simple integration tests for most forges

This commit adds simple integration tests for most forges. Notice that there
isn't a self hosted gitlab (yet), because I haven't found one yet. When I do
that, I'll make sure to add it.

justfile

@@ -147,3 +147,31 @@ alias c := cross
     # Generate Checksums
     # TODO: moved to gh-release just checksum
 
+testString := "The fault, dear Brutus, is not in our flakes, but in our governance, that we aren't moderators."
+
+run_test TARGET:
+    #!/usr/bin/env bash
+    set -euxo pipefail
+    test_dir=`mktemp -d -t "XXXXXXX-rime-itest"`
+    nix run {{TARGET}} --refresh 2> $test_dir/nix-run.log 1> $test_dir/nix-run.out
+    diff -U3 --color=auto <(cat $test_dir/nix-run.out) <(echo "{{testString}}")
+    if grep -q 'warning: error:' $test_dir/nix-run.log; then
+        cat $test_dir/nix-run.log;
+        rm $test_dir -r
+        echo "tests failed >_<"
+        exit 1
+    fi
+    rm $test_dir -r
+
+
+# Integration Testing (requires Nix)
+itest:
+    set -euxo pipefail
+    just run_test "http://localhost:3000/v1/codeberg/cafkafk/hello.tar.gz"
+    just run_test "http://localhost:3000/v1/github/cafkafk/hello.tar.gz"
+    just run_test "http://localhost:3000/v1/gitlab/gitlab.com/cafkafk/hello.tar.gz"
+    just run_test "http://localhost:3000/v1/gitlab/gitlab.com/cafkafk/hello.tar.gz"
+    just run_test "http://localhost:3000/v1/forgejo/next.forgejo.org/cafkafk/hello.tar.gz"
+    just run_test "http://localhost:3000/v1/flakehub/cafkafk/hello/v/v0.0.1.tar.gz"
+    # TODO: self hosted gitlab
+    @echo "tests passsed :3"