[new release] mustache (3.2.0)

[psafont]

Mustache logic-less templates in OCaml

• Project page: https://github.com/rgrinberg/ocaml-mustache

CHANGES:

• Remove the AST without locations: now all functions build an AST with locations;
  in particular, parsing always provide located error messages.
  To ease backward-compatibility, the smart constructors still use the
  same interface, using dummy locations by default, with
  a With_locations module for users who wish to explicitly provide
  locations.
  (@gasche, Remove the ast without locations rgrinberg/ocaml-mustache#65)
• Support for "template inheritance" (partials with parameters)
  {{<foo}} {{$param1}}...{{/param1}} {{$param2}}...{{/param2}} {{/foo}
  following the widely-implemented semi-official specification
  Add template inheritance spec mustache/spec#75
  (@gasche, 58)
• Partials are now supported in the mustache command-line tool (@gasche, have partials interpreted as template inclusion in mustache_cli rgrinberg/ocaml-mustache#57)
  They are interpreted as template inclusion: "{{>foo/bar}}" will include
  "foo/bar.mustache", relative to the current working directory.
• Improve error messages (@gasche, Simplistic support for reporting lexing and parsing errors in template files rgrinberg/ocaml-mustache#47, Better errors rgrinberg/ocaml-mustache#51, Simpler lexer rgrinberg/ocaml-mustache#56)
  Note: the exceptions raised by Mustache have changed, this breaks
  compatibility for users that would catch and deconstruct existing
  exceptions.
• Add render_buf to render templates directly to buffers (@gasche, render functions: render in a buffer rgrinberg/ocaml-mustache#48)
• When a lookup fails in the current context, lookup in parents contexts.
  This should fix errors when using "{{#foo}}" for a scalar variable
  'foo' to check that the variable exists.
  (@gasche, when lookup fail in the current context, go to parent contexts rgrinberg/ocaml-mustache#49)

[psafont]

Investigating the devreps breaking to see if it's expected or needs fixing:

# File "src/autoindex.ml", line 126, characters 4-35:
# 126 |   | Mustache_types.Missing_variable s | Mustache_types.Missing_section s | Mustache_types.Missing_partial s ->
#           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
# Error: Unbound constructor Mustache_types.Missing_variable

It's expected: rgrinberg/ocaml-mustache@bf3ad00

Will add the upper bound in soupalt

[psafont]

All revdeps pass, all the failures left are due to soupault, unrelated to mustache

[haochenx]

All looks good to me except for the tiny cosmetic change suggested.

All CI failures are unrelated to this PR as stated in #24839 (comment)

All revdeps pass, all the failures left are due to soupault, unrelated to mustache

[haochenx]

(triage note) it seems that the doc link (http://rgrinberg.github.io/mustache/) is removed. it's likely intentional since the link is now 404

[mseri]

@psafont can you remove the bound on soupault? I think Re was transitively inherited from some other package. I will look into that separately

[psafont]

can you remove the bound on soupault?

I added the bound because this version of mustache has breaking changes and breaks those versions of soupault. Is this not standard practise anymore?

[mseri]

Oh sorry for wasting your time and thanks. I thought it was for the Re failure in the lower bounds, my bad. I will add them back manually.

[psafont]

I had the changeset prepared just in case ;)

[mseri]

Thanks a lot!