barrel-migrations is broken

[SWW13]

Setup

Versions

• Rust: nightly (rustc 1.29.0 (aa3ca1994 2018-09-11))
• Diesel: 1.3.3 / master
• Database: psql
• Operating System linux

Feature Flags

• diesel: barrel-migrations,postgres

Problem Description

Using the barrel-migrations-feature is broken in the current diesel / barrel version.

What are you trying to accomplish?

Use diesel with barrel as described in https://github.com/spacekookie/barrel/blob/master/guides/diesel-setup.md.

What is the expected output?

Working migrations.

What is the actual output?

[diesel 1.3.3, barrel <= 0.2.0]

$ diesel migration run
Running migration mod.rs
Received an empty query

[diesel master, barrel master]

$ diesel migration run
Running migration mod.rs
Executing migration script /path/to/project/migrations/2018-09-21-125612_init_db/mod.rs/up.sql
Failed with: Received an empty query

Are you seeing any additional errors?

[diesel 1.3.3, barrel <= 0.2.0]
The temporary created migration project build fails silently in the background:

$ cargo build
   Compiling tmp-generator v0.0.0 (file:///tmp/barrel.nkunnkN46LTx)                                                                                                                                 
error: couldn't read "/path/to/project/migrations/2018-09-21-125612_init_db/mod.rs/mod.rs": Not a directory (os error 20)
 --> src/main.rs:8:1
  |
8 | include!("/path/to/project/migrations/2018-09-21-125612_init_db/mod.rs/mod.rs");
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

error: Could not compile `tmp-generator`.

To learn more, run the command again with --verbose.

Steps to reproduce

Follow https://github.com/spacekookie/barrel/blob/master/guides/diesel-setup.md.

Checklist

• I have already looked over the issue tracker for similar issues.
• This issue can be reproduced on Rust's stable channel. (Your issue will be
  closed if this is not the case)
  You're kidding?! diesel_cli with barrel-migrations doesn't build on stable.

---

This seems to be a problem in combination with barrel, I'm going to investigate this further.

[sgrif]

Barrel is a separate project, and is not maintained by Diesel. Please open an issue with that project instead.

[spacekookie]

There already is an issue. I doubt that it's actually the code in diesel that's causing the issue. But I'll have a look at it tomorrow.