redo-always/redo-ifcreate/redo-stamp: work inside chdir().

If someone cd's to another directory and then runs redo-always, we weren't
adding to the right target.

redo-always.py

@@ -5,8 +5,10 @@ from log import err
 
 
 try:
-    me = state.File(name=vars.TARGET)
-    me.add_dep('m', state.ALWAYS)
+    me = os.path.join(vars.STARTDIR, 
+                      os.path.join(vars.PWD, vars.TARGET))
+    f = state.File(name=me)
+    f.add_dep('m', state.ALWAYS)
     always = state.File(name=state.ALWAYS)
     always.stamp = state.STAMP_MISSING
     always.set_changed()

redo-ifcreate.py

@@ -5,12 +5,14 @@ from log import err
 
 
 try:
-    me = state.File(name=vars.TARGET)
+    me = os.path.join(vars.STARTDIR, 
+                      os.path.join(vars.PWD, vars.TARGET))
+    f = state.File(name=me)
     for t in sys.argv[1:]:
         if os.path.exists(t):
             err('redo-ifcreate: error: %r already exists\n' % t)
             sys.exit(1)
         else:
-            me.add_dep('c', t)
+            f.add_dep('c', t)
 except KeyboardInterrupt:
     sys.exit(200)

redo-stamp.py

@@ -33,7 +33,9 @@ csum = sh.hexdigest()
 if not vars.TARGET:
     sys.exit(0)
 
-f = state.File(name=vars.TARGET)
+me = os.path.join(vars.STARTDIR, 
+                  os.path.join(vars.PWD, vars.TARGET))
+f = state.File(name=me)
 changed = (csum != f.csum)
 debug2('%s: old = %s\n' % (f.name, f.csum))
 debug2('%s: sum = %s (%s)\n' % (f.name, csum,

t/always1.do

@@ -1,3 +1,4 @@
 echo $$ >>always1.log
 echo $$
+cd ..
 redo-always

t/alwaystest.do

@@ -1,6 +1,8 @@
 rm -f always1 always1.log
 
-redo always1
+cd ..
+redo t/always1
+cd t
 [ "$(wc -l <always1.log)" -eq 1 ] || exit 11
 
 # This shouldn't rebuild, but because other people might be running flush-cache.sh
@@ -12,3 +14,12 @@ redo always1
 redo-ifchange always1
 . ./skip-if-minimal-do.sh
 [ "$(wc -l <always1.log)" -eq 2 ] || exit 31
+
+./flush-cache.sh
+redo-ifchange always1
+[ "$(wc -l <always1.log)" -eq 3 ] || exit 41
+
+cd ..
+./t/flush-cache.sh
+redo-ifchange t/always1
+[ "$(wc -l <t/always1.log)" -eq 4 ] || exit 51

t/stamp/stampy.do

@@ -1,4 +1,5 @@
 echo $$ >>stampy.log
 redo-ifchange inp bob
 cat inp
-redo-stamp <inp
+cd ..
+redo-stamp <stamp/inp