diff options
Diffstat (limited to 'lib/default.nix')
| -rw-r--r-- | lib/default.nix | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/default.nix b/lib/default.nix index f720a08..0a99f97 100644 --- a/lib/default.nix +++ b/lib/default.nix @@ -42,6 +42,23 @@ let { in flatten [] (source.${source.type}.inputs or {}); + # Tells whether a source's inputs get drawn from other sources by a + # generated flake in .populate/flakes, instead of by rewriting the lock + # file of the flake in the source. Symlink sources point at other + # sources, whose lock files stay as they are. + hasGeneratedFlake = source: + lib.flakeFollows source != [] && + (source.type == "symlink" || !(source.${source.type}.rewriteLock or true)); + + # Tells whether a flake or flake-input source gets delivered as a copy, + # which gets patched, gets its lock file rewritten, or is materialized. + derivesFlake = source: let + source' = source.${source.type}; + in + lib.elem source.type [ "flake" "flake-input" ] && + (source'.materialize or false || source'.patches or [] != [] || + (source'.rewriteLock or true && lib.flakeFollows source != [])); + maybeHostName = default: let # We're parsing /etc/hostname here because reading # /proc/sys/kernel/hostname yields "" |