adds error message for file-not-found on |cp, |mv, and |rm

also adds an error message for mark changes

app/hood.hoon

@@ -136,6 +136,8 @@
 ++  poke-kiln-merge           (wrap poke-merge):from-kiln
 ++  poke-kiln-cancel          (wrap poke-cancel):from-kiln
 ++  poke-kiln-mount           (wrap poke-mount):from-kiln
+++  poke-kiln-cp              (wrap poke-cp):from-kiln
+++  poke-kiln-mv              (wrap poke-mv):from-kiln
 ++  poke-kiln-rm              (wrap poke-rm):from-kiln
 ++  poke-kiln-schedule        (wrap poke-schedule):from-kiln
 ++  poke-kiln-track           (wrap poke-track):from-kiln

gen/hood/cp.hoon

@@ -4,6 +4,4 @@
 /?    310
 :-  %say
 |=  {^ {input/path output/path $~} $~}
-:+  %kiln-info  "copied"
-?>  =(-:(flop input) -:(flop output))
-(foal output -:(flop input) [%atom %t ~] .^(* %cx input))    ::  XX type
+[%kiln-cp input output]

gen/hood/mv.hoon

@@ -4,7 +4,4 @@
 /?    310
 :-  %say
 |=  {^ {input/path output/path $~} $~}
-:+  %kiln-info  "moved"
-?>  =(-:(flop input) -:(flop output))
-%+  furl  (fray input)
-(foal output -:(flop input) [%noun .^(* %cx input)])
+[%kiln-mv input output]

lib/kiln.hoon

@@ -157,7 +157,39 @@
   |=  {mez/tape tor/toro}
   abet:(emit:(spam leaf+mez ~) %info /kiln our tor)
 ::
-++  poke-rm  |=(a/path (poke-info "removed" (fray a)))
+++  poke-cp
+  |=  {a/path b/path}
+  ?.  =(-:(flop a) -:(flop b))
+    =+  ~[leaf+"Can't copy to a different mark"]
+    abet:(spam -)
+  =+  c=.^(arch %cy a)
+  ?~  fil.c
+    =+  ~[leaf+"No such file:" leaf+"{<a>}"]
+    abet:(spam -)
+  %+  poke-info  "copied"
+  (foal b -:(flop a) [%atom %t ~] .^(* %cx a))        ::  XX type
+::
+++  poke-mv
+  |=  {a/path b/path}
+  ?.  =(-:(flop a) -:(flop b))
+    =+  ~[leaf+"Can't move to a different mark"]
+    abet:(spam -)
+  =+  c=.^(arch %cy a)
+  ?~  fil.c
+    =+  ~[leaf+"No such file:" leaf+"{<a>}"]
+    abet:(spam -)
+  %+  poke-info  "moved"
+  %+  furl  (fray a)
+  (foal b -:(flop a) [%noun .^(* %cx a)])
+::
+++  poke-rm
+  |=  a/path
+  =+  b=.^(arch %cy a)
+  ?~  fil.b
+    =+  ~[leaf+"No such file:" leaf+"{<a>}"]
+    abet:(spam -)
+  (poke-info "removed" (fray a))
+::
 ++  poke-label
   |=  {syd/desk lab/@tas}
   =+  pax=/(scot %p our)/[syd]/[lab]