* implement variadic placeholders
imported snippets reflect actual lines in file
* add import directive line number for imported snippets
add tests for parsing
* add realfile field to help debug import cycle detection.
* use file field to reflect import chain
* Switch syntax, deprecate old syntax, refactoring
- Moved the import args handling to a separate file
- Using {args[0:1]} syntax now
- Deprecate {args.*} syntax
- Use a replacer map for better control over the parsing
- Add plenty of warnings when invalid placeholders are detected
- Renaming variables, cleanup comments for readability
- More tests to cover edgecases I could think of
- Minor cleanup to snippet tracking in tokens, drop a redundant boolean field in tokens
---------
Co-authored-by: Francis Lavoie <lavofr@gmail.com>
* httpcaddyfile: Change the parse rules when empty file or dotfile with a glob.
* Fixes#5295
* Empty file should just log a warning, and result in no tokens.
* The last segment of the path is '*', it should skip any dotfiles.
* The last segment of the path is '.*', it should read all dotfiles in a dir.
* httpcaddyfile: Regard empty files as import files which include only white space.
* caddyfile: Support for raw token values, improve `map`, `expression`
* Applied code review comments
* Rename RawVal to ValRaw
Co-authored-by: Matthew Holt <mholt@users.noreply.github.com>
Some new users mistakenly try to define two sites without braces around each. Doing this can yield a confusing error message saying that their site address is an "unknown directive".
We can do better by keeping track of whether the current site block was parsed with or without a brace, then changing the error message later based on that.
For example, now this invalid config:
```
foo.example.com
respond "foo"
bar.example.com
respond "bar"
```
Will yield this error message:
```
$ caddy adapt
2021/08/22 19:21:31.028 INFO using adjacent Caddyfile
adapt: Caddyfile:4: unrecognized directive: bar.example.com
Did you mean to define a second site? If so, you must use curly braces around each site to separate their configurations.
```
Some users forget to use a comma between their site addresses. This is invalid (commas aren't a valid character in domains) and later parts of the code like certificate automation will try to use this otherwise, which doesn't make sense. Best to error as early as possible.
Example thread on the forums where this happened: https://caddy.community/t/simplify-caddyfile/13281/9
* caddyfile: Add parse error on site address in `{`
This is an incredibly common mistake made by users, so we should catch it earlier in the parser and give a more friendly message. Often it ends up adapting but with mistakes, or erroring out later due to other site addresses being read as directives.
There's not really ever a situation where a lone '{' is valid at the end of a site address (but I suppose there are edgecases where the user wants to use a path matcher where it ends specifically in `{`, but... why?), so this should be fine.
* Update caddyconfig/caddyfile/parse.go
* caddyfile(formatter): fix nesting not decrementing
This is an extremely weird edge-case where if you had a environment variable {}
on one line, a comment on the next line, and the closing of the block on the
following line; the rest of the Caddyfile would be indented further than it
should've been.
ref; https://github.com/matthewpi/vscode-caddyfile-support/issues/13
* run gofmt
* fmt: better way of handling edge case
* caddyfile: Fix `import` replacing unrelated placeholders
See https://caddy.community/t/snippet-issue-works-outside-snippet/12231
So it turns out that `NewReplacer()` gives a replacer with some global defaults (like `{env.*}` and some system and time placeholders), which is not ideal when running `import` because we just want to replace `{args.*}` only, and nothing else.
* caddyfile: Add test
* caddyfile: reject recursive self-imports
* caddyfile: detect and reject cyclic imports of snippets and files
* caddyfile: do not be stickler about connected nodes not being connected already
* caddyfile: include missing test artifacts of cyclic imports
* address review comments
Previous commit improved the Caddyfile adapter so it doesn't unnecessarily add names to "skip" in "auto_https" when the server is already HTTP-only.
This commit updates the tests to reflect that change, while also fixing the Caddyfile formatting in many of the tests.
We also print the line number of the divergence between input and formatted version in Caddyfile adapt warnings - very useful for finding initial formatting problems.
* caddyfile: Introduce basic linting and fmt check
This will help encourage people to keep their Caddyfiles tidy.
* Remove unrelated tests
I am not sure that testing the output of warnings here is quite the
right idea; these tests are just for syntax and parsing success.
Thus far the fuzzers have found a few crashers in the Caddyfile parser. However, the fuzzer have been stuck at import glob expansion after import glob expansion, which aren't reproducible.
Certificate selection used to be a module, but this seems unnecessary,
especially since the built-in CustomSelectionPolicy allows quite complex
selection logic on a number of fields in certs. If we need to extend
that logic, we can, but I don't think there are SO many possibilities
that we need modules.
This update also allows certificate selection to choose between multiple
matching certs based on client compatibility and makes a number of other
improvements in the default cert selection logic, both here and in the
latest CertMagic.
The hardest part of this was the conn policy consolidation logic
(Caddyfile only, of course). We have to merge connection policies that
we can easily combine, because if two certs are manually loaded in a
Caddyfile site block, that produces two connection policies, and each
cert is tagged with a different tag, meaning only the first would ever
be selected. So given the same matchers, we can merge the two, but this
required improving the Tag selection logic to support multiple tags to
choose from, hence "tags" changed to "any_tag" or "all_tags" (but we
use any_tag in our Caddyfile logic).
Combining conn policies with conflicting settings is impossible, so
that should return an error if two policies with the exact same matchers
have non-empty settings that are not the same (the one exception being
any_tag which we can merge because the logic for them is to OR them).
It was a bit complicated. It seems to work in numerous tests I've
conducted, but we'll see how it pans out in the release candidates.
