+
−
+
−  $ cat > engine.py << EOF
+
−  > 
+
−  > from mercurial import (
+
−  >     pycompat,
+
−  >     templater,
+
−  >     templateutil,
+
−  > )
+
−  > 
+
−  > class mytemplater(templater.engine):
+
−  >     def _load(self, t):
+
−  >         return self._loader(t)
+
−  > 
+
−  >     def process(self, t, map):
+
−  >         tmpl = self._load(t)
+
−  >         props = self._defaults.copy()
+
−  >         props.update(map)
+
−  >         for k, v in props.items():
+
−  >             if b'{{%s}}' % k not in tmpl:
+
−  >                 continue
+
−  >             if callable(v) and getattr(v, '_requires', None) is None:
+
−  >                 props = self._resources.copy()
+
−  >                 props.update(map)
+
−  >                 v = v(**pycompat.strkwargs(props))
+
−  >             elif callable(v):
+
−  >                 v = v(self, props)
+
−  >             v = templateutil.stringify(self, props, v)
+
−  >             tmpl = tmpl.replace(b'{{%s}}' % k, v)
+
−  >         yield tmpl
+
−  > 
+
−  > templater.engines[b'my'] = mytemplater
+
−  > EOF
+
−  $ hg init test
+
−  $ echo '[extensions]' > test/.hg/hgrc
+
−  $ echo "engine = `pwd`/engine.py" >> test/.hg/hgrc
+
−  $ cd test
+
−  $ cat > mymap << EOF
+
−  > changeset = my:changeset.txt
+
−  > EOF
+
−  $ cat > changeset.txt << EOF
+
−  > {{rev}} {{node}} {{author}}
+
−  > EOF
+
−  $ hg ci -Ama
+
−  adding changeset.txt
+
−  adding mymap
+
−  $ hg log --style=./mymap
+
−  0 97e5f848f0936960273bbf75be6388cd0350a32b test
+
−
+
−  $ cat > changeset.txt << EOF
+
−  > {{p1rev}} {{p1node}} {{p2rev}} {{p2node}}
+
−  > EOF
+
−  $ hg ci -Ama
+
−  $ hg log --style=./mymap
+
−  0 97e5f848f0936960273bbf75be6388cd0350a32b -1 0000000000000000000000000000000000000000
+
−  -1 0000000000000000000000000000000000000000 -1 0000000000000000000000000000000000000000
+
−
+
−invalid engine type:
+
−
+
−  $ echo 'changeset = unknown:changeset.txt' > unknownenginemap
+
−  $ hg log --style=./unknownenginemap
+
−  abort: invalid template engine: unknown
+
−  [255]
+
−
+
−  $ cd ..