@node State
@cindex storage
@cindex state
@unnumbered State

Dependency and build state is kept inside @file{.redo} subdirectory in
each directory related the build. Each corresponding target has its own,
recreated with every rebuild, @file{.rec} file. It is
@url{https://www.gnu.org/software/recutils/, recfile}, that could have
various dependency information. For example:

@example
Build: 80143f04-bfff-4673-950c-081d712f573d

Type: ifcreate
Target: foo.o.do

Type: ifchange
Target: default.o.do
Size: 123
InodeNum: 2345
CtimeSec: 1605721341
CtimeNsec: 253305000
MtimeSec: 1645606823
MtimeNsec: 369936700
Hash: f4929732f96f11e6d4ebe94536b5edef426d00ed0146853e37a87f4295e18eda

Type: always

Type: stamp
Hash: 5bbdf635932cb16b9127e69b6f3872577efed338f0a4ab6f2c7ca3df6ce50cc9
@end example

And the schema definition:
@verbatiminclude ../dep.rec