ci: Run ./ci/render.sh to ensure diagrams are up to date

[nhooyr]

Will need to install the various tools and set TSTRUCT_TOKEN for tala.

[nhooyr]

Another issue here will be that mmdc seems to always cause the output svgs to be updated even if the input mermaid didn't change.

[nhooyr]

Looks like SVGs include a randomly generated ID to make the css classes unique.

grep -o -m1 'id="mermaid-[0-9]*"' ./src/examples/0_basic/render/mermaid_dagre.svg | sed 's#id="\(mermaid-[0-9]*\)"#\1#'

Can just replace the generated ID with a constant one based on the example name. I'm surprised mermaid doesn't use inline CSS.

[alixander]

oh, yeah we do something like that too, except our ID is a hash on the diagram attributes, so unique per diagram, which is rly all that's needed (and is deterministic).

[nhooyr]

Oh very clever!

[aloisklink]

Looks like SVGs include a randomly generated ID to make the css classes unique.

I believe the deterministicIds Mermaid Configuration variable might help you:

https://mermaid-js.github.io/mermaid/#/Setup?id=deterministicids

I'm not sure why that value isn't true by default (maybe there is some downside).

I'm surprised mermaid doesn't use inline CSS.

Yep, that's currently a pretty big issue with Mermaid. It means websites that have strict Content Security Policy rules break rendering Mermaid diagrams.

[nhooyr]

Nice @aloisklink

I tried it out in f770e77 but for some reason example 6 still changes between every run. Here's an example diff:

diff --git a/src/examples/6_tables/render/mermaid_dagre.svg b/src/examples/6_tables/render/mermaid_dagre.svg
index acf584d..937a654 100644
--- a/src/examples/6_tables/render/mermaid_dagre.svg
+++ b/src/examples/6_tables/render/mermaid_dagre.svg
@@ -1 +1 @@
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id="entity-CAR- changes across each run. Only this example for some reason, all the other examples seem fine. Any ideas?

mmd code is at https://raw.githubusercontent.com/terrastruct/text-to-diagram-site/whitespace-2eec/src/examples/6_tables/syntax/mermaid.mmd

[aloisklink]

id="entity-CAR- changes across each run. Only this example for some reason, all the other examples seem fine. Any ideas?

It looks like you've encountered a bug! I've got a fix pending in mermaid-js/mermaid#3916, but it will probably take a while (a few weeks) to get released, unfortunately.