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nix/tests/functional/fetchMercurial.sh
2025-09-26 08:41:30 -07:00

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#!/usr/bin/env bash
source common.sh
[[ $(type -p hg) ]] || skipTest "Mercurial not installed"
TODO_NixOS
clearStore
# Intentionally not in a canonical form
# See https://github.com/NixOS/nix/issues/6195
repo=$TEST_ROOT/./hg
rm -rf "$repo" "${repo}"-tmp "$TEST_HOME"/.cache/nix
hg init "$repo"
{
echo '[ui]'
echo 'username = Foobar <foobar@example.org>'
# Set ui.tweakdefaults to ensure HGPLAIN is being set.
echo 'tweakdefaults = True'
} >> "$repo"/.hg/hgrc
echo utrecht > "$repo"/hello
touch "$repo"/.hgignore
hg add --cwd "$repo" hello .hgignore
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 "$repo" -r tip --template '{node}')
# Fetch an unclean branch.
echo unclean > "$repo"/hello
path=$(nix eval --impure --raw --expr "(builtins.fetchMercurial file://$repo).outPath")
[[ $(cat "$path"/hello) = unclean ]]
hg revert --cwd "$repo" --all
# Fetch the default branch.
path=$(nix eval --impure --raw --expr "(builtins.fetchMercurial file://$repo).outPath")
[[ $(cat "$path"/hello) = world ]]
# In pure eval mode, fetchGit without a revision should fail.
[[ $(nix eval --impure --raw --expr "(builtins.readFile (fetchMercurial file://$repo + \"/hello\"))") = world ]]
(! nix eval --raw --expr "builtins.readFile (fetchMercurial file://$repo + \"/hello\")")
# Fetch using an explicit revision hash.
path2=$(nix eval --impure --raw --expr "(builtins.fetchMercurial { url = file://$repo; rev = \"$rev2\"; }).outPath")
[[ $path = "$path2" ]]
# In pure eval mode, fetchGit with a revision should succeed.
[[ $(nix eval --raw --expr "builtins.readFile (fetchMercurial { url = file://$repo; rev = \"$rev2\"; } + \"/hello\")") = world ]]
# Fetch again. This should be cached.
mv "$repo" "${repo}"-tmp
path2=$(nix eval --impure --raw --expr "(builtins.fetchMercurial file://$repo).outPath")
[[ $path = "$path2" ]]
[[ $(nix eval --impure --raw --expr "(builtins.fetchMercurial file://$repo).branch") = default ]]
[[ $(nix eval --impure --expr "(builtins.fetchMercurial file://$repo).revCount") = 1 ]]
[[ $(nix eval --impure --raw --expr "(builtins.fetchMercurial file://$repo).rev") = "$rev2" ]]
# But with TTL 0, it should fail.
(! nix eval --impure --refresh --expr "builtins.fetchMercurial file://$repo")
# Fetching with a explicit hash should succeed.
path2=$(nix eval --refresh --raw --expr "(builtins.fetchMercurial { url = file://$repo; rev = \"$rev2\"; }).outPath")
[[ $path = "$path2" ]]
path2=$(nix eval --refresh --raw --expr "(builtins.fetchMercurial { url = file://$repo; rev = \"$rev1\"; }).outPath")
[[ $(cat "$path2"/hello) = utrecht ]]
mv "${repo}"-tmp "$repo"
# Using a clean working tree should produce the same result.
path2=$(nix eval --impure --raw --expr "(builtins.fetchMercurial $repo).outPath")
[[ $path = "$path2" ]]
# Using an unclean tree should yield the tracked but uncommitted changes.
mkdir "$repo"/dir1 "$repo"/dir2
echo foo > "$repo"/dir1/foo
echo bar > "$repo"/bar
echo bar > "$repo"/dir2/bar
hg add --cwd "$repo" dir1/foo
hg rm --cwd "$repo" hello
path2=$(nix eval --impure --raw --expr "(builtins.fetchMercurial $repo).outPath")
[ ! -e "$path2"/hello ]
[ ! -e "$path2"/bar ]
[ ! -e "$path2"/dir2/bar ]
[ ! -e "$path2"/.hg ]
[[ $(cat "$path2"/dir1/foo) = foo ]]
[[ $(nix eval --impure --raw --expr "(builtins.fetchMercurial $repo).rev") = 0000000000000000000000000000000000000000 ]]
# ... unless we're using an explicit ref.
path3=$(nix eval --impure --raw --expr "(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 --impure --refresh --raw --expr "(builtins.fetchMercurial file://$repo).outPath")
[[ $path2 = "$path4" ]]
echo paris > "$repo"/hello
# Passing a `name` argument should be reflected in the output path
path5=$(nix eval -vvvvv --impure --refresh --raw --expr "(builtins.fetchMercurial { url = \"file://$repo\"; name = \"foo\"; } ).outPath")
[[ $path5 =~ -foo$ ]]