mirror of
https://github.com/nix-community/home-manager.git
synced 2024-12-15 17:50:53 +00:00
9f9e277b60
These (and the `*MD` functions apart from `literalMD`) are now no-ops
in nixpkgs and serve no purpose other than to add additional noise and
potentially mislead people into thinking unmarked DocBook documentation
will still be accepted.
Note that if backporting changes including documentation to 23.05,
the `mdDoc` calls will need to be re-added.
To reproduce this commit, run:
$ NIX_PATH=nixpkgs=flake:nixpkgs/e7e69199f0372364a6106a1e735f68604f4c5a25 \
nix shell nixpkgs#coreutils \
-c find . -name '*.nix' \
-exec nix run -- github:emilazy/nix-doc-munge/98dadf1f77351c2ba5dcb709a2a171d655f15099 \
--strip {} +
$ ./format
409 lines
15 KiB
Nix
409 lines
15 KiB
Nix
{ pkgs, config, lib, ... }:
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with lib;
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let
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cfg = filterAttrs (n: f: f.enable) config.home.file;
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homeDirectory = config.home.homeDirectory;
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fileType = (import lib/file-type.nix {
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inherit homeDirectory lib pkgs;
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}).fileType;
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sourceStorePath = file:
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let
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sourcePath = toString file.source;
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sourceName = config.lib.strings.storeFileName (baseNameOf sourcePath);
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in
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if builtins.hasContext sourcePath
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then file.source
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else builtins.path { path = file.source; name = sourceName; };
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in
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{
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options = {
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home.file = mkOption {
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description = "Attribute set of files to link into the user home.";
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default = {};
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type = fileType "home.file" "{env}`HOME`" homeDirectory;
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};
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home-files = mkOption {
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type = types.package;
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internal = true;
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description = "Package to contain all home files";
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};
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};
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config = {
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assertions = [(
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let
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dups =
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attrNames
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(filterAttrs (n: v: v > 1)
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(foldAttrs (acc: v: acc + v) 0
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(mapAttrsToList (n: v: { ${v.target} = 1; }) cfg)));
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dupsStr = concatStringsSep ", " dups;
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in {
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assertion = dups == [];
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message = ''
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Conflicting managed target files: ${dupsStr}
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This may happen, for example, if you have a configuration similar to
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home.file = {
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conflict1 = { source = ./foo.nix; target = "baz"; };
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conflict2 = { source = ./bar.nix; target = "baz"; };
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}'';
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})
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];
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lib.file.mkOutOfStoreSymlink = path:
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let
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pathStr = toString path;
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name = hm.strings.storeFileName (baseNameOf pathStr);
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in
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pkgs.runCommandLocal name {} ''ln -s ${escapeShellArg pathStr} $out'';
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# This verifies that the links we are about to create will not
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# overwrite an existing file.
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home.activation.checkLinkTargets = hm.dag.entryBefore ["writeBoundary"] (
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let
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# Paths that should be forcibly overwritten by Home Manager.
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# Caveat emptor!
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forcedPaths =
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concatMapStringsSep " " (p: ''"$HOME"/${escapeShellArg p}'')
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(mapAttrsToList (n: v: v.target)
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(filterAttrs (n: v: v.force) cfg));
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check = pkgs.writeText "check" ''
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${config.lib.bash.initHomeManagerLib}
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# A symbolic link whose target path matches this pattern will be
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# considered part of a Home Manager generation.
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homeFilePattern="$(readlink -e ${escapeShellArg builtins.storeDir})/*-home-manager-files/*"
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forcedPaths=(${forcedPaths})
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newGenFiles="$1"
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shift
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for sourcePath in "$@" ; do
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relativePath="''${sourcePath#$newGenFiles/}"
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targetPath="$HOME/$relativePath"
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forced=""
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for forcedPath in "''${forcedPaths[@]}"; do
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if [[ $targetPath == $forcedPath* ]]; then
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forced="yeah"
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break
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fi
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done
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if [[ -n $forced ]]; then
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$VERBOSE_ECHO "Skipping collision check for $targetPath"
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elif [[ -e "$targetPath" \
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&& ! "$(readlink "$targetPath")" == $homeFilePattern ]] ; then
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# The target file already exists and it isn't a symlink owned by Home Manager.
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if cmp -s "$sourcePath" "$targetPath"; then
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# First compare the files' content. If they're equal, we're fine.
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warnEcho "Existing file '$targetPath' is in the way of '$sourcePath', will be skipped since they are the same"
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elif [[ ! -L "$targetPath" && -n "$HOME_MANAGER_BACKUP_EXT" ]] ; then
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# Next, try to move the file to a backup location if configured and possible
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backup="$targetPath.$HOME_MANAGER_BACKUP_EXT"
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if [[ -e "$backup" ]]; then
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errorEcho "Existing file '$backup' would be clobbered by backing up '$targetPath'"
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collision=1
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else
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warnEcho "Existing file '$targetPath' is in the way of '$sourcePath', will be moved to '$backup'"
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fi
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else
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# Fail if nothing else works
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errorEcho "Existing file '$targetPath' is in the way of '$sourcePath'"
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collision=1
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fi
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fi
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done
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if [[ -v collision ]] ; then
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errorEcho "Please move the above files and try again or use 'home-manager switch -b backup' to back up existing files automatically."
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exit 1
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fi
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'';
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in
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''
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function checkNewGenCollision() {
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local newGenFiles
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newGenFiles="$(readlink -e "$newGenPath/home-files")"
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find "$newGenFiles" \( -type f -or -type l \) \
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-exec bash ${check} "$newGenFiles" {} +
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}
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checkNewGenCollision || exit 1
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''
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);
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# This activation script will
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#
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# 1. Remove files from the old generation that are not in the new
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# generation.
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#
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# 2. Switch over the Home Manager gcroot and current profile
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# links.
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#
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# 3. Symlink files from the new generation into $HOME.
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#
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# This order is needed to ensure that we always know which links
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# belong to which generation. Specifically, if we're moving from
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# generation A to generation B having sets of home file links FA
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# and FB, respectively then cleaning before linking produces state
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# transitions similar to
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#
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# FA → FA ∩ FB → (FA ∩ FB) ∪ FB = FB
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#
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# and a failure during the intermediate state FA ∩ FB will not
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# result in lost links because this set of links are in both the
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# source and target generation.
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home.activation.linkGeneration = hm.dag.entryAfter ["writeBoundary"] (
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let
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link = pkgs.writeShellScript "link" ''
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newGenFiles="$1"
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shift
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for sourcePath in "$@" ; do
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relativePath="''${sourcePath#$newGenFiles/}"
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targetPath="$HOME/$relativePath"
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if [[ -e "$targetPath" && ! -L "$targetPath" && -n "$HOME_MANAGER_BACKUP_EXT" ]] ; then
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# The target exists, back it up
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backup="$targetPath.$HOME_MANAGER_BACKUP_EXT"
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$DRY_RUN_CMD mv $VERBOSE_ARG "$targetPath" "$backup" || errorEcho "Moving '$targetPath' failed!"
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fi
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if [[ -e "$targetPath" && ! -L "$targetPath" ]] && cmp -s "$sourcePath" "$targetPath" ; then
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# The target exists but is identical – don't do anything.
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$VERBOSE_ECHO "Skipping '$targetPath' as it is identical to '$sourcePath'"
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else
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# Place that symlink, --force
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# This can still fail if the target is a directory, in which case we bail out.
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$DRY_RUN_CMD mkdir -p $VERBOSE_ARG "$(dirname "$targetPath")"
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$DRY_RUN_CMD ln -Tsf $VERBOSE_ARG "$sourcePath" "$targetPath" || exit 1
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fi
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done
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'';
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cleanup = pkgs.writeShellScript "cleanup" ''
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${config.lib.bash.initHomeManagerLib}
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# A symbolic link whose target path matches this pattern will be
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# considered part of a Home Manager generation.
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homeFilePattern="$(readlink -e ${escapeShellArg builtins.storeDir})/*-home-manager-files/*"
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newGenFiles="$1"
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shift 1
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for relativePath in "$@" ; do
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targetPath="$HOME/$relativePath"
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if [[ -e "$newGenFiles/$relativePath" ]] ; then
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$VERBOSE_ECHO "Checking $targetPath: exists"
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elif [[ ! "$(readlink "$targetPath")" == $homeFilePattern ]] ; then
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warnEcho "Path '$targetPath' does not link into a Home Manager generation. Skipping delete."
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else
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$VERBOSE_ECHO "Checking $targetPath: gone (deleting)"
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$DRY_RUN_CMD rm $VERBOSE_ARG "$targetPath"
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# Recursively delete empty parent directories.
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targetDir="$(dirname "$relativePath")"
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if [[ "$targetDir" != "." ]] ; then
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pushd "$HOME" > /dev/null
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# Call rmdir with a relative path excluding $HOME.
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# Otherwise, it might try to delete $HOME and exit
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# with a permission error.
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$DRY_RUN_CMD rmdir $VERBOSE_ARG \
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-p --ignore-fail-on-non-empty \
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"$targetDir"
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popd > /dev/null
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fi
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fi
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done
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'';
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in
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''
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function linkNewGen() {
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_i "Creating home file links in %s" "$HOME"
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local newGenFiles
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newGenFiles="$(readlink -e "$newGenPath/home-files")"
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find "$newGenFiles" \( -type f -or -type l \) \
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-exec bash ${link} "$newGenFiles" {} +
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}
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function cleanOldGen() {
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if [[ ! -v oldGenPath || ! -e "$oldGenPath/home-files" ]] ; then
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return
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fi
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_i "Cleaning up orphan links from %s" "$HOME"
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local newGenFiles oldGenFiles
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newGenFiles="$(readlink -e "$newGenPath/home-files")"
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oldGenFiles="$(readlink -e "$oldGenPath/home-files")"
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# Apply the cleanup script on each leaf in the old
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# generation. The find command below will print the
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# relative path of the entry.
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find "$oldGenFiles" '(' -type f -or -type l ')' -printf '%P\0' \
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| xargs -0 bash ${cleanup} "$newGenFiles"
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}
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cleanOldGen
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if [[ ! -v oldGenPath || "$oldGenPath" != "$newGenPath" ]] ; then
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_i "Creating profile generation %s" $newGenNum
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if [[ -e "$genProfilePath"/manifest.json ]] ; then
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# Remove all packages from "$genProfilePath"
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# `nix profile remove '.*' --profile "$genProfilePath"` was not working, so here is a workaround:
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nix profile list --profile "$genProfilePath" \
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| cut -d ' ' -f 4 \
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| xargs -t $DRY_RUN_CMD nix profile remove $VERBOSE_ARG --profile "$genProfilePath"
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$DRY_RUN_CMD nix profile install $VERBOSE_ARG --profile "$genProfilePath" "$newGenPath"
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else
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$DRY_RUN_CMD nix-env $VERBOSE_ARG --profile "$genProfilePath" --set "$newGenPath"
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fi
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$DRY_RUN_CMD nix-store --realise "$newGenPath" --add-root "$newGenGcPath" > "$DRY_RUN_NULL"
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if [[ -e "$legacyGenGcPath" ]]; then
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$DRY_RUN_CMD rm $VERBOSE_ARG "$legacyGenGcPath"
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fi
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else
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_i "No change so reusing latest profile generation %s" "$oldGenNum"
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fi
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linkNewGen
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''
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);
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home.activation.checkFilesChanged = hm.dag.entryBefore ["linkGeneration"] (
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let
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homeDirArg = escapeShellArg homeDirectory;
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in ''
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function _cmp() {
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if [[ -d $1 && -d $2 ]]; then
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diff -rq "$1" "$2" &> /dev/null
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else
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cmp --quiet "$1" "$2"
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fi
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}
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declare -A changedFiles
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'' + concatMapStrings (v:
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let
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sourceArg = escapeShellArg (sourceStorePath v);
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targetArg = escapeShellArg v.target;
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in ''
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_cmp ${sourceArg} ${homeDirArg}/${targetArg} \
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&& changedFiles[${targetArg}]=0 \
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|| changedFiles[${targetArg}]=1
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'') (filter (v: v.onChange != "") (attrValues cfg))
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+ ''
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unset -f _cmp
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''
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);
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home.activation.onFilesChange = hm.dag.entryAfter ["linkGeneration"] (
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concatMapStrings (v: ''
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if (( ''${changedFiles[${escapeShellArg v.target}]} == 1 )); then
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if [[ -v DRY_RUN || -v VERBOSE ]]; then
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echo "Running onChange hook for" ${escapeShellArg v.target}
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fi
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if [[ ! -v DRY_RUN ]]; then
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${v.onChange}
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fi
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fi
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'') (filter (v: v.onChange != "") (attrValues cfg))
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);
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# Symlink directories and files that have the right execute bit.
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# Copy files that need their execute bit changed.
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home-files = pkgs.runCommandLocal
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"home-manager-files"
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{
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nativeBuildInputs = [ pkgs.xorg.lndir ];
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}
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(''
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mkdir -p $out
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# Needed in case /nix is a symbolic link.
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realOut="$(realpath -m "$out")"
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function insertFile() {
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local source="$1"
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local relTarget="$2"
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local executable="$3"
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local recursive="$4"
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# If the target already exists then we have a collision. Note, this
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# should not happen due to the assertion found in the 'files' module.
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# We therefore simply log the conflict and otherwise ignore it, mainly
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# to make the `files-target-config` test work as expected.
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if [[ -e "$realOut/$relTarget" ]]; then
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echo "File conflict for file '$relTarget'" >&2
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return
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fi
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# Figure out the real absolute path to the target.
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local target
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target="$(realpath -m "$realOut/$relTarget")"
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# Target path must be within $HOME.
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if [[ ! $target == $realOut* ]] ; then
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echo "Error installing file '$relTarget' outside \$HOME" >&2
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exit 1
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fi
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mkdir -p "$(dirname "$target")"
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if [[ -d $source ]]; then
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if [[ $recursive ]]; then
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mkdir -p "$target"
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lndir -silent "$source" "$target"
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else
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ln -s "$source" "$target"
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fi
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else
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[[ -x $source ]] && isExecutable=1 || isExecutable=""
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# Link the file into the home file directory if possible,
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# i.e., if the executable bit of the source is the same we
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# expect for the target. Otherwise, we copy the file and
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# set the executable bit to the expected value.
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if [[ $executable == inherit || $isExecutable == $executable ]]; then
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ln -s "$source" "$target"
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else
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cp "$source" "$target"
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if [[ $executable == inherit ]]; then
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# Don't change file mode if it should match the source.
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:
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elif [[ $executable ]]; then
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chmod +x "$target"
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else
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chmod -x "$target"
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fi
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fi
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fi
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}
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'' + concatStrings (
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mapAttrsToList (n: v: ''
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insertFile ${
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escapeShellArgs [
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(sourceStorePath v)
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v.target
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(if v.executable == null
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then "inherit"
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else toString v.executable)
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(toString v.recursive)
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]}
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'') cfg
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));
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};
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}
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