rust: switch hg-core and hg-cpython to rust 2018 edition
Many interesting changes have happened in Rust since the Oxidation Plan was
introduced, like the 2018 edition and procedural macros:
- Opting in to the 2018 edition is a clear benefit in terms of future
proofing, new (nice to have) syntactical sugar notwithstanding. It
also has a new non-lexical, non-AST based borrow checker that has
fewer bugs(!) and allows us to write correct code that in some cases
would have been rejected by the old one.
- Procedural macros allow us to use the PyO3 crate which maintainers have
expressed the clear goal of compiling on stable, which would help in
code maintainability compared to rust-cpython.
In this patch are the following changes:
- Removing most `extern crate` uses
- Updating `use` clauses (`crate` keyword, nested `use`)
- Removing `mod.rs` in favor of an aptly named module file
Like discussed in the mailing list (
https://www.mercurial-scm.org/pipermail/mercurial-devel/2019-July/132316.html
), until Rust integration in Mercurial is considered to be out of the
experimental phase, the maximum version of Rust allowed is whatever the latest
version Debian packages.
Differential Revision: https://phab.mercurial-scm.org/D6597
#require vcr
$ cat >> $HGRCPATH <<EOF
> [extensions]
> phabricator =
> EOF
$ hg init repo
$ cd repo
$ cat >> .hg/hgrc <<EOF
> [phabricator]
> url = https://phab.mercurial-scm.org/
> callsign = HG
>
> [auth]
> hgphab.schemes = https
> hgphab.prefix = phab.mercurial-scm.org
> # When working on the extension and making phabricator interaction
> # changes, edit this to be a real phabricator token. When done, edit
> # it back. The VCR transcripts will be auto-sanitised to replace your real
> # token with this value.
> hgphab.phabtoken = cli-hahayouwish
> EOF
$ VCR="$TESTDIR/phabricator"
Error is handled reasonably. We override the phabtoken here so that
when you're developing changes to phabricator.py you can edit the
above config and have a real token in the test but not have to edit
this test.
$ hg phabread --config auth.hgphab.phabtoken=cli-notavalidtoken \
> --test-vcr "$VCR/phabread-conduit-error.json" D4480 | head
abort: Conduit Error (ERR-INVALID-AUTH): API token "cli-notavalidtoken" has the wrong length. API tokens should be 32 characters long.
Basic phabread:
$ hg phabread --test-vcr "$VCR/phabread-4480.json" D4480 | head
# HG changeset patch
# Date 1536771503 0
# Parent a5de21c9e3703f8e8eb064bd7d893ff2f703c66a
exchangev2: start to implement pull with wire protocol v2
Wire protocol version 2 will take a substantially different
approach to exchange than version 1 (at least as far as pulling
is concerned).
This commit establishes a new exchangev2 module for holding
phabupdate with an accept:
$ hg phabupdate --accept D4564 \
> -m 'I think I like where this is headed. Will read rest of series later.'\
> --test-vcr "$VCR/accept-4564.json"
Create a differential diff:
$ HGENCODING=utf-8; export HGENCODING
$ echo alpha > alpha
$ hg ci --addremove -m 'create alpha for phabricator test €'
adding alpha
$ hg phabsend -r . --test-vcr "$VCR/phabsend-create-alpha.json"
D1190 - created - d386117f30e6: create alpha for phabricator test \xe2\x82\xac (esc)
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/d386117f30e6-24ffe649-phabsend.hg
$ echo more >> alpha
$ HGEDITOR=true hg ci --amend
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/a86ed7d85e86-b7a54f3b-amend.hg
$ echo beta > beta
$ hg ci --addremove -m 'create beta for phabricator test'
adding beta
$ hg phabsend -r ".^::" --test-vcr "$VCR/phabsend-update-alpha-create-beta.json"
D1190 - updated - d940d39fb603: create alpha for phabricator test \xe2\x82\xac (esc)
D1191 - created - 4b2486dfc8c7: create beta for phabricator test
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/4b2486dfc8c7-d90584fa-phabsend.hg
$ unset HGENCODING
The amend won't explode after posting a public commit. The local tag is left
behind to identify it.
$ echo 'public change' > beta
$ hg ci -m 'create public change for phabricator testing'
$ hg phase --public .
$ echo 'draft change' > alpha
$ hg ci -m 'create draft change for phabricator testing'
$ hg phabsend --amend -r '.^::' --test-vcr "$VCR/phabsend-create-public.json"
D1192 - created - 24ffd6bca53a: create public change for phabricator testing
D1193 - created - ac331633be79: create draft change for phabricator testing
warning: not updating public commit 2:24ffd6bca53a
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/ac331633be79-719b961c-phabsend.hg
$ hg tags -v
tip 3:a19f1434f9a5
D1192 2:24ffd6bca53a local
$ hg debugcallconduit user.search --test-vcr "$VCR/phab-conduit.json" <<EOF
> {
> "constraints": {
> "isBot": true
> }
> }
> EOF
{
"cursor": {
"after": null,
"before": null,
"limit": 100,
"order": null
},
"data": [],
"maps": {},
"query": {
"queryKey": null
}
}
Template keywords
$ hg log -T'{rev} {phabreview|json}\n'
3 {"id": "D1193", "url": "https://phab.mercurial-scm.org/D1193"}
2 {"id": "D1192", "url": "https://phab.mercurial-scm.org/D1192"}
1 {"id": "D1191", "url": "https://phab.mercurial-scm.org/D1191"}
0 {"id": "D1190", "url": "https://phab.mercurial-scm.org/D1190"}
$ hg log -T'{rev} {if(phabreview, "{phabreview.url} {phabreview.id}")}\n'
3 https://phab.mercurial-scm.org/D1193 D1193
2 https://phab.mercurial-scm.org/D1192 D1192
1 https://phab.mercurial-scm.org/D1191 D1191
0 https://phab.mercurial-scm.org/D1190 D1190
Commenting when phabsending:
$ echo comment > comment
$ hg ci --addremove -m "create comment for phabricator test"
adding comment
$ hg phabsend -r . -m "For default branch" --test-vcr "$VCR/phabsend-comment-created.json"
D1253 - created - a7ee4bac036a: create comment for phabricator test
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/a7ee4bac036a-8009b5a0-phabsend.hg
$ echo comment2 >> comment
$ hg ci --amend
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/81fce7de1b7d-05339e5b-amend.hg
$ hg phabsend -r . -m "Address review comments" --test-vcr "$VCR/phabsend-comment-updated.json"
D1253 - updated - 1acd4b60af38: create comment for phabricator test
$ cd ..