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Diffstat (limited to 'modules/home-environment.nix')
| -rw-r--r-- | modules/home-environment.nix | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/modules/home-environment.nix b/modules/home-environment.nix index b270b1cc317..3b62b77f4e5 100644 --- a/modules/home-environment.nix +++ b/modules/home-environment.nix @@ -246,6 +246,37 @@ in # script's "check" and the "write" phases. home.activation.writeBoundary = dagEntryAnywhere ""; + # This verifies that the links we are about to create will not + # overwrite an existing file. + home.activation.checkLinkTargets = dagEntryBefore ["writeBoundary"] ( + let + pattern = "-home-manager-files/"; + check = pkgs.writeText "check" '' + newGenFiles="$1" + shift + for sourcePath in "$@" ; do + relativePath="''${sourcePath#$newGenFiles/}" + targetPath="$HOME/$relativePath" + if [[ -e "$targetPath" \ + && ! "$(readlink -e "$targetPath")" =~ "${pattern}" ]] ; then + echo -e "Existing file '$targetPath' is in the way" + collision=1 + fi + done + + if [[ -v collision ]] ; then + echo -e "Please move the above files and try again" + exit 1 + fi + ''; + in + '' + newGenFiles="$(readlink -e "$newGenPath/home-files")" + find "$newGenFiles" -type f -print0 -or -type l -print0 \ + | xargs -0 bash ${check} "$newGenFiles" + '' + ); + home.activation.linkGeneration = dagEntryAfter ["writeBoundary"] ( let link = pkgs.writeText "link" '' |