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Add fetchMercurial primop

Browse source 
E.g.

  $ nix eval '(fetchMercurial https://www.mercurial-scm.org/repo/hello)'
  { branch = "default"; outPath = "/nix/store/alvb9y1kfz42bjishqmyy3pphnrh1pfa-source"; rev = "82e55d328c8ca4ee16520036c0aaace03a5beb65"; revCount = 1; shortRev = "82e55d328c8c"; }

  $ nix eval '(fetchMercurial { url = https://www.mercurial-scm.org/repo/hello; rev = "0a04b987be5ae354b710cefeba0e2d9de7ad41a9"; })'
  { branch = "default"; outPath = "/nix/store/alvb9y1kfz42bjishqmyy3pphnrh1pfa-source"; rev = "0a04b987be5ae354b710cefeba0e2d9de7ad41a9"; revCount = 0; shortRev = "0a04b987be5a"; }

  $ nix eval '(fetchMercurial /tmp/unclean-hg-tree)'
  { branch = "default"; outPath = "/nix/store/cm750cdw1x8wfpm3jq7mz09r30l9r024-source"; rev = "0000000000000000000000000000000000000000"; revCount = 0; shortRev = "000000000000"; }
This commit is contained in:
Eelco Dolstra 2017-11-01 16:32:53 +01:00
parent cd532a9251
commit 1969f357b7
No known key found for this signature in database
GPG key ID: 8170B4726D7198DE
7 changed files with 269 additions and 5 deletions
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73
tests/fetchMercurial.sh Normal file
View file

@ -0,0 +1,73 @@
source common.sh
if [[ -z $(type -p hg) ]]; then
echo "Mercurial not installed; skipping Mercurial tests"
exit 0
fi
clearStore
repo=$TEST_ROOT/hg
rm -rfv $repo ${repo}-tmp $TEST_HOME/.cache/nix/hg
hg init $repo
echo '[ui]' >> $repo/.hg/hgrc
echo 'username = Foobar <foobar@example.org>' >> $repo/.hg/hgrc
echo utrecht > $repo/hello
hg add --cwd $repo hello
hg commit --cwd $repo -m 'Bla1'
rev1=$(hg log --cwd $repo -r tip --template '{node}')
echo world > $repo/hello
hg commit --cwd $repo -m 'Bla2'
rev2=$(hg log --cwd $repo -r tip --template '{node}')
hg log --cwd $repo
hg log --cwd $repo -r tip --template '{node}\n'
path=$(nix eval --raw "(builtins.fetchMercurial file://$repo).outPath")
[[ $(cat $path/hello) = world ]]
# Fetch again. This should be cached.
mv $repo ${repo}-tmp
path2=$(nix eval --raw "(builtins.fetchMercurial file://$repo).outPath")
[[ $path = $path2 ]]
[[ $(nix eval --raw "(builtins.fetchMercurial file://$repo).branch") = default ]]
[[ $(nix eval "(builtins.fetchMercurial file://$repo).revCount") = 1 ]]
[[ $(nix eval --raw "(builtins.fetchMercurial file://$repo).rev") = $rev2 ]]
# But with TTL 0, it should fail.
(! nix eval --tarball-ttl 0 --raw "(builtins.fetchMercurial file://$repo)")
mv ${repo}-tmp $repo
# Using a clean working tree should produce the same result.
path2=$(nix eval --raw "(builtins.fetchMercurial $repo).outPath")
[[ $path = $path2 ]]
# Using an unclean tree should yield the tracked but uncommitted changes.
echo foo > $repo/foo
echo bar > $repo/bar
hg add --cwd $repo foo
hg rm --cwd $repo hello
path2=$(nix eval --raw "(builtins.fetchMercurial $repo).outPath")
[ ! -e $path2/hello ]
[ ! -e $path2/bar ]
[[ $(cat $path2/foo) = foo ]]
[[ $(nix eval --raw "(builtins.fetchMercurial $repo).rev") = 0000000000000000000000000000000000000000 ]]
# ... unless we're using an explicit rev.
path3=$(nix eval --raw "(builtins.fetchMercurial { url = $repo; rev = \"default\"; }).outPath")
[[ $path = $path3 ]]
# Committing should not affect the store path.
hg commit --cwd $repo -m 'Bla3'
path4=$(nix eval --tarball-ttl 0 --raw "(builtins.fetchMercurial file://$repo).outPath")
[[ $path2 = $path4 ]]