Improve the experience of running Docker locally

[DianQK]

When running locally, the absence of the GITHUB_STEP_SUMMARY environment variable will lead to the following error:

::endgroup::
./src/ci/docker/run.sh: line 349: : No such file or directory

I've also changed the output artifacts directory to obj/$image_name, allowing me to easily run all images locally. We always encounter various strange issues when modifying the test cases in the codegen directory.

r? Kobzol cc @saethlin

[Kobzol]

This is great, thanks! I want to improve the experience of running CI locally more in the future, to make it easier to reproduce our CI artifacts, this is a good start (and also an important fix).

[Kobzol]

@bors r+ rollup=never

Let's see if everything works fine on CI.

[bors]

📌 Commit 86e939e has been approved by Kobzol

It is now in the queue for this repository.

[bors]

⌛ Testing commit 86e939e with merge 6c6b302...

[bors]

☀️ Test successful - checks-actions
Approved by: Kobzol
Pushing 6c6b302 to master...

[rust-timer]

Finished benchmarking commit (6c6b302): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

This benchmark run did not return any relevant results for this metric.

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	2.1%	[2.1%, 2.1%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.9%	[-1.9%, -1.9%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.1%	[-1.9%, 2.1%]	2

Cycles

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	1.8%	[1.8%, 1.8%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.8%	[1.8%, 1.8%]	1

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 678.091s -> 679.119s (0.15%)
Artifact size: 316.07 MiB -> 316.14 MiB (0.02%)