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e369a547bd
Adds a CI check and Makefile target to keep opted-in directories'
README.md files in sync with their package godoc. For now tsnet (and
its sub-packages under tsnet/example) is the only opted-in tree. The
list of directories lives in misc/genreadme/genreadme.go as
defaultRoots, so CI and humans both just run `make genreadme` with no
arguments.
The genreadme workflow runs `make genreadme` and fails if any
README.md is out of date, pointing the user at the same command.
Along the way:
- tempfork/pkgdoc now emits Markdown instead of plain text: headings
become level-2 with no {#hdr-...} anchors, and [Symbol] doc links
resolve to pkg.go.dev URLs, including for symbols in the current
package (which the default Printer would otherwise emit as bare
#Name fragments with no backing anchor in a README). Parsing no
longer uses parser.ImportsOnly, so doc.Package knows the package's
symbols and can resolve [Symbol] links at all.
- genreadme also emits a pkg.go.dev Go Reference badge at the top of
a library package's README; suppressed for package main.
- tsnet/tsnet.go's package godoc is expanded in idiomatic godoc
syntax — [Type], [Type.Method], reference-style [link]: URL
definitions — rather than Markdown-flavored [text](url) or
backtick-quoted identifiers, so that both pkg.go.dev and the
generated README.md render cleanly from a single source.
Fixes #19431
Fixes #19483
Fixes #19470
Change-Id: Iade21dc87921ab2bbb65951e5fb373b597fed29e
Signed-off-by: Walter Poupore <walterp@tailscale.com>