add path based redirects

up to now, those were managed outside of this repo, which as
unsurprisingly a real hassle to deal with if one wanted to prevent URLs
from breaking when moving pages around. this change removes a large part
of the friction involved in moving content in the Nix manual.

possible next steps for further automation:
- check for content that moved and warn if it's not reachable from
  links that were valid prior to a change
- create redirect rules automatically based on this information

(cherry picked from commit 2b7016cc56d12e67de9f1f25b18311866a26a5fe)
This commit is contained in:
Valentin Gagarin 2023-11-27 08:33:03 +01:00 committed by github-actions[bot]
parent 05b7e2dc57
commit 8fb477a6e7
2 changed files with 35 additions and 3 deletions

30
doc/manual/_redirects Normal file
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# redirect rules for paths (server-side) to prevent link rot.
# see ./redirects.js for redirects based on URL fragments (client-side)
#
# concrete user story this supports:
# - user finds URL to the manual for Nix x.y
# - Nix x.z (z > y) is the most recent release
# - updating the version in the URL will show the right thing
#
# format documentation:
# - https://docs.netlify.com/routing/redirects/#syntax-for-the-redirects-file
# - https://docs.netlify.com/routing/redirects/redirect-options/
#
# conventions:
# - always force (<CODE>!) since this allows re-using file names
# - group related paths to ease readability
# - always append new redirects to the end of the file
# - redirects that should have been there but are missing can be inserted where they belong
/expressions/expression-language /language/ 301!
/expressions/language-values /language/values 301!
/expressions/language-constructs /language/constructs 301!
/expressions/language-operators /language/operators 301!
/expressions/* /language/:splat 301!
/package-management/basic-package-mgmt /command-ref/nix-env 301!
/package-management/channels* /command-ref/nix-channel 301!
/package-management/s3-substituter* /command-ref/new-cli/nix3-help-stores#s3-binary-cache-store 301!

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// redirect rules for anchors ensure backwards compatibility of URLs. // redirect rules for URL fragments (client-side) to prevent link rot.
// this must be done on the client side, as web servers do not see the anchor part of the URL. // this must be done on the client side, as web servers do not see the fragment part of the URL.
// it will only work with JavaScript enabled in the browser, but this is the best we can do here.
// see ./_redirects for path redirects (client-side)
// redirections are declared as follows: // redirects are declared as follows:
// each entry has as its key a path matching the requested URL path, relative to the mdBook document root. // each entry has as its key a path matching the requested URL path, relative to the mdBook document root.
// //
// IMPORTANT: it must specify the full path with file name and suffix // IMPORTANT: it must specify the full path with file name and suffix