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jtojnar/fr
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20
COPYING
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20
COPYING
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@ -0,0 +1,20 @@
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Copyright (c) 2020-2021 Eelco Dolstra and the flake-compat contributors
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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41
README.md
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41
README.md
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@ -0,0 +1,41 @@
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# flake-compat
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## Usage
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> [!WARNING]
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> During the Lix private beta period during which Forgejo is private, this
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> requires configuring netrc in Lix for the tarball download to work.
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>
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> Your netrc should look something like so:
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> ```
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> machine git.lix.systems login YOUR-USERNAME password SOME-PERSONAL-ACCESS-TOKEN-REPO-READ
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> ```
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>
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> We are terribly sorry for the UX for this being very bad
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> ([issue](https://git.lix.systems/lix-project/lix/issues/254)).
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To use, add the following to your `flake.nix`:
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<!-- FIXME: this can use the standard non-api archive url when we are
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un-privated -->
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```nix
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inputs.flake-compat.url = "https://git.lix.systems/api/v1/repos/lix-project/flake-compat/archive/main.tar.gz";
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```
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Afterwards, create a `default.nix` file containing the following:
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```nix
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(import
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(
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let lock = builtins.fromJSON (builtins.readFile ./flake.lock); in
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fetchTarball {
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url = lock.nodes.flake-compat.locked.url;
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sha256 = lock.nodes.flake-compat.locked.narHash;
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}
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)
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{ src = ./.; }
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).defaultNix
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```
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If you would like a `shell.nix` file, create one containing the above, replacing `defaultNix` with `shellNix`.
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96
default.nix
96
default.nix
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@ -16,7 +16,11 @@ let
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fetchTree =
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info:
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if info.type == "github" then
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{ outPath = fetchTarball "https://api.${info.host or "github.com"}/repos/${info.owner}/${info.repo}/tarball/${info.rev}";
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{ outPath =
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fetchTarball
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({ url = "https://api.${info.host or "github.com"}/repos/${info.owner}/${info.repo}/tarball/${info.rev}"; }
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// (if info ? narHash then { sha256 = info.narHash; } else {})
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);
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rev = info.rev;
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shortRev = builtins.substring 0 7 info.rev;
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lastModified = info.lastModified;
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@ -29,28 +33,47 @@ let
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({ url = info.url; }
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// (if info ? rev then { inherit (info) rev; } else {})
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// (if info ? ref then { inherit (info) ref; } else {})
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// (if info ? submodules then { inherit (info) submodules; } else {})
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);
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rev = info.rev;
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shortRev = builtins.substring 0 7 info.rev;
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lastModified = info.lastModified;
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lastModifiedDate = formatSecondsSinceEpoch info.lastModified;
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narHash = info.narHash;
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}
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} // (if info ? rev then {
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rev = info.rev;
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shortRev = builtins.substring 0 7 info.rev;
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} else {
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})
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else if info.type == "path" then
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{ outPath = builtins.path { path = info.path; };
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narHash = info.narHash;
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}
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else if info.type == "tarball" then
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{ outPath = fetchTarball info.url;
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narHash = info.narHash;
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{ outPath =
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fetchTarball
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({ inherit (info) url; }
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// (if info ? narHash then { sha256 = info.narHash; } else {})
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);
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}
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else if info.type == "gitlab" then
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{ inherit (info) rev narHash lastModified;
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outPath = fetchTarball "https://${info.host or "gitlab.com"}/api/v4/projects/${info.owner}%2F${info.repo}/repository/archive.tar.gz?sha=${info.rev}";
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outPath =
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fetchTarball
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({ url = "https://${info.host or "gitlab.com"}/api/v4/projects/${info.owner}%2F${info.repo}/repository/archive.tar.gz?sha=${info.rev}"; }
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// (if info ? narHash then { sha256 = info.narHash; } else {})
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);
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shortRev = builtins.substring 0 7 info.rev;
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}
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else if info.type == "sourcehut" then
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{ inherit (info) rev narHash lastModified;
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outPath =
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fetchTarball
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({ url = "https://${info.host or "git.sr.ht"}/${info.owner}/${info.repo}/archive/${info.rev}.tar.gz"; }
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// (if info ? narHash then { sha256 = info.narHash; } else {})
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);
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shortRev = builtins.substring 0 7 info.rev;
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}
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else
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# FIXME: add Mercurial, tarball inputs.
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# FIXME: add Mercurial inputs.
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throw "flake input has unsupported input type '${info.type}'";
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callFlake4 = flakeSrc: locks:
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@ -77,18 +100,33 @@ let
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# Try to clean the source tree by using fetchGit, if this source
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# tree is a valid git repository.
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tryFetchGit = src:
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if isGit && !isShallow && hasBranch
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then builtins.fetchGit src
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else { outPath = src; };
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if isGit && !isShallow
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then
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let res = builtins.fetchGit src;
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in if res.rev == "0000000000000000000000000000000000000000" then removeAttrs res ["rev" "shortRev"] else res
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else {
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outPath =
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# Massage `src` into a store path.
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if builtins.isPath src
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then
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if dirOf (toString src) == builtins.storeDir
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# `builtins.storePath` is not available in pure-eval mode.
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&& builtins ? currentSystem
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then
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# If it's already a store path, don't copy it again.
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builtins.storePath src
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else
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"${src}"
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else
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src;
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};
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# NB git worktrees have a file for .git, so we don't check the type of .git
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isGit = builtins.pathExists (src + "/.git");
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isShallow = builtins.pathExists (src + "/.git/shallow");
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# Repos without commits do not have any heads.
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hasBranch = builtins.pathExists (src + "/.git/refs/heads") && builtins.readDir (src + "/.git/refs/heads") != { };
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in
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(if src ? outPath then src else tryFetchGit src)
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// { lastModified = 0; lastModifiedDate = formatSecondsSinceEpoch 0; };
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{ lastModified = 0; lastModifiedDate = formatSecondsSinceEpoch 0; }
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// (if src ? outPath then src else tryFetchGit src);
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# Format number of seconds in the Unix epoch as %Y%m%d%H%M%S.
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formatSecondsSinceEpoch = t:
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@ -126,7 +164,9 @@ let
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subdir = if key == lockFile.root then "" else node.locked.dir or "";
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flake = import (sourceInfo + (if subdir != "" then "/" else "") + subdir + "/flake.nix");
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outPath = sourceInfo + ((if subdir == "" then "" else "/") + subdir);
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flake = import (outPath + "/flake.nix");
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inputs = builtins.mapAttrs
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(inputName: inputSpec: allNodes.${resolveInput inputSpec})
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@ -153,7 +193,21 @@ let
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outputs = flake.outputs (inputs // { self = result; });
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result = outputs // sourceInfo // { inherit inputs; inherit outputs; inherit sourceInfo; };
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result =
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outputs
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# We add the sourceInfo attribute for its metadata, as they are
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# relevant metadata for the flake. However, the outPath of the
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# sourceInfo does not necessarily match the outPath of the flake,
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# as the flake may be in a subdirectory of a source.
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# This is shadowed in the next //
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// sourceInfo
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// {
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# This shadows the sourceInfo.outPath
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inherit outPath;
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inherit inputs; inherit outputs; inherit sourceInfo; _type = "flake";
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};
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in
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if node.flake or true then
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assert builtins.isFunction flake.outputs;
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@ -175,10 +229,12 @@ let
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in
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rec {
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defaultNix =
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result
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// (if result ? defaultPackage.${system} then { default = result.defaultPackage.${system}; } else {});
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(builtins.removeAttrs result ["__functor"])
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// (if result ? defaultPackage.${system} then { default = result.defaultPackage.${system}; } else {})
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// (if result ? packages.${system}.default then { default = result.packages.${system}.default; } else {});
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shellNix =
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defaultNix
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// (if result ? devShell.${system} then { default = result.devShell.${system}; } else {});
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// (if result ? devShell.${system} then { default = result.devShell.${system}; } else {})
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// (if result ? devShells.${system}.default then { default = result.devShells.${system}.default; } else {});
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}
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