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nix flake init: Add a '--template' flag

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The initial contents of the flake is specified by the
'templates.<name>' or 'defaultTemplate' output of another flake. E.g.

  outputs = { self }: {

    templates = {

      nixos-container = {
        path = ./nixos-container;
        description = "An example of a NixOS container";
      };

    };

  };

allows

  $ nix flake init -t templates#nixos-container

Also add a command 'nix flake new', which is identical to 'nix flake
init' except that it initializes a specified directory rather than the
current directory.
This commit is contained in:
Eelco Dolstra 2020-06-04 20:02:50 +02:00
parent dc305500c3
commit 810b2c6a48
8 changed files with 258 additions and 41 deletions
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66
tests/flakes.sh
View file

@ -20,12 +20,14 @@ flake2Dir=$TEST_ROOT/flake2
flake3Dir=$TEST_ROOT/flake3
flake4Dir=$TEST_ROOT/flake4
flake5Dir=$TEST_ROOT/flake5
flake6Dir=$TEST_ROOT/flake6
flake7Dir=$TEST_ROOT/flake7
templatesDir=$TEST_ROOT/templates
nonFlakeDir=$TEST_ROOT/nonFlake
flakeA=$TEST_ROOT/flakeA
flakeB=$TEST_ROOT/flakeB
for repo in $flake1Dir $flake2Dir $flake3Dir $flake7Dir $nonFlakeDir $flakeA $flakeB; do
for repo in $flake1Dir $flake2Dir $flake3Dir $flake7Dir $templatesDir $nonFlakeDir $flakeA $flakeB; do
rm -rf $repo $repo.tmp
mkdir $repo
git -C $repo init
@ -145,13 +147,22 @@ cat > $registry <<EOF
"type": "indirect",
"id": "flake1"
}
},
{ "from": {
"type": "indirect",
"id": "templates"
},
"to": {
"type": "git",
"url": "file://$templatesDir"
}
}
]
}
EOF
# Test 'nix flake list'.
[[ $(nix registry list | wc -l) == 6 ]]
[[ $(nix registry list | wc -l) == 7 ]]
# Test 'nix flake info'.
nix flake info flake1 | grep -q 'URL: .*flake1.*'
@ -392,18 +403,61 @@ nix build -o $TEST_ROOT/result flake4/removeXyzzy#sth
# Testing the nix CLI
nix registry add flake1 flake3
[[ $(nix registry list | wc -l) == 7 ]]
[[ $(nix registry list | wc -l) == 8 ]]
nix registry pin flake1
[[ $(nix registry list | wc -l) == 7 ]]
[[ $(nix registry list | wc -l) == 8 ]]
nix registry remove flake1
[[ $(nix registry list | wc -l) == 6 ]]
[[ $(nix registry list | wc -l) == 7 ]]
# Test 'nix flake init'.
cat > $templatesDir/flake.nix <<EOF
{
description = "Some templates";
outputs = { self }: {
templates = {
trivial = {
path = ./trivial;
description = "A trivial flake";
};
};
defaultTemplate = self.templates.trivial;
};
}
EOF
mkdir $templatesDir/trivial
cat > $templatesDir/trivial/flake.nix <<EOF
{
description = "A flake for building Hello World";
outputs = { self, nixpkgs }: {
packages.x86_64-linux.hello = nixpkgs.legacyPackages.x86_64-linux.hello;
defaultPackage.x86_64-linux = self.packages.x86_64-linux.hello;
};
}
EOF
git -C $templatesDir add flake.nix trivial/flake.nix
git -C $templatesDir commit -m 'Initial'
nix flake check templates
nix flake show templates
(cd $flake7Dir && nix flake init)
(cd $flake7Dir && nix flake init) # check idempotence
git -C $flake7Dir add flake.nix
nix flake check $flake7Dir
nix flake show $flake7Dir
git -C $flake7Dir commit -a -m 'Initial'
# Test 'nix flake new'.
rm -rf $flake6Dir
nix flake new -t templates#trivial $flake6Dir
nix flake new -t templates#trivial $flake6Dir # check idempotence
nix flake check $flake6Dir
# Test 'nix flake clone'.
rm -rf $TEST_ROOT/flake1-v2
nix flake clone flake1 --dest $TEST_ROOT/flake1-v2
@ -663,4 +717,4 @@ git -C $flakeB commit -a -m 'Foo'
[[ $(nix eval --update-input b $flakeA#foo) = 1912 ]]
# Test list-inputs with circular dependencies
nix flake list-inputs $flakeA
nix flake list-inputs $flakeA