Initial commit
This commit is contained in:
0
lib/utemplate/__init__.py
Normal file
0
lib/utemplate/__init__.py
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lib/utemplate/compiled.py
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lib/utemplate/compiled.py
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class Loader:
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def __init__(self, pkg, dir):
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if dir == ".":
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dir = ""
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else:
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dir = dir.replace("/", ".") + "."
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if pkg and pkg != "__main__":
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dir = pkg + "." + dir
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self.p = dir
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def load(self, name):
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name = name.replace(".", "_")
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return __import__(self.p + name, None, None, (name,)).render
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lib/utemplate/recompile.py
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lib/utemplate/recompile.py
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# (c) 2014-2020 Paul Sokolovsky. MIT license.
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try:
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from uos import stat, remove
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except:
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from os import stat, remove
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from . import source
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class Loader(source.Loader):
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def load(self, name):
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o_path = self.pkg_path + self.compiled_path(name)
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i_path = self.pkg_path + self.dir + "/" + name
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try:
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o_stat = stat(o_path)
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i_stat = stat(i_path)
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if i_stat[8] > o_stat[8]:
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# input file is newer, remove output to force recompile
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remove(o_path)
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finally:
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return super().load(name)
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188
lib/utemplate/source.py
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lib/utemplate/source.py
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# (c) 2014-2019 Paul Sokolovsky. MIT license.
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from . import compiled
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class Compiler:
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START_CHAR = "{"
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STMNT = "%"
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STMNT_END = "%}"
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EXPR = "{"
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EXPR_END = "}}"
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def __init__(self, file_in, file_out, indent=0, seq=0, loader=None):
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self.file_in = file_in
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self.file_out = file_out
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self.loader = loader
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self.seq = seq
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self._indent = indent
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self.stack = []
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self.in_literal = False
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self.flushed_header = False
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self.args = "*a, **d"
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def indent(self, adjust=0):
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if not self.flushed_header:
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self.flushed_header = True
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self.indent()
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self.file_out.write("def render%s(%s):\n" % (str(self.seq) if self.seq else "", self.args))
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self.stack.append("def")
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self.file_out.write(" " * (len(self.stack) + self._indent + adjust))
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def literal(self, s):
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if not s:
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return
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if not self.in_literal:
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self.indent()
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self.file_out.write('yield """')
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self.in_literal = True
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self.file_out.write(s.replace('"', '\\"'))
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def close_literal(self):
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if self.in_literal:
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self.file_out.write('"""\n')
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self.in_literal = False
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def render_expr(self, e):
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self.indent()
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self.file_out.write('yield str(' + e + ')\n')
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def parse_statement(self, stmt):
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tokens = stmt.split(None, 1)
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if tokens[0] == "args":
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if len(tokens) > 1:
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self.args = tokens[1]
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else:
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self.args = ""
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elif tokens[0] == "set":
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self.indent()
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self.file_out.write(stmt[3:].strip() + "\n")
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elif tokens[0] == "include":
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if not self.flushed_header:
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# If there was no other output, we still need a header now
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self.indent()
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tokens = tokens[1].split(None, 1)
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args = ""
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if len(tokens) > 1:
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args = tokens[1]
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if tokens[0][0] == "{":
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self.indent()
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# "1" as fromlist param is uPy hack
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self.file_out.write('_ = __import__(%s.replace(".", "_"), None, None, 1)\n' % tokens[0][2:-2])
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self.indent()
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self.file_out.write("yield from _.render(%s)\n" % args)
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return
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with self.loader.input_open(tokens[0][1:-1]) as inc:
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self.seq += 1
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c = Compiler(inc, self.file_out, len(self.stack) + self._indent, self.seq)
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inc_id = self.seq
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self.seq = c.compile()
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self.indent()
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self.file_out.write("yield from render%d(%s)\n" % (inc_id, args))
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elif len(tokens) > 1:
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if tokens[0] == "elif":
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assert self.stack[-1] == "if"
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self.indent(-1)
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self.file_out.write(stmt + ":\n")
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else:
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self.indent()
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self.file_out.write(stmt + ":\n")
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self.stack.append(tokens[0])
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else:
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if stmt.startswith("end"):
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assert self.stack[-1] == stmt[3:]
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self.stack.pop(-1)
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elif stmt == "else":
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assert self.stack[-1] == "if"
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self.indent(-1)
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self.file_out.write("else:\n")
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else:
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assert False
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def parse_line(self, l):
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while l:
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start = l.find(self.START_CHAR)
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if start == -1:
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self.literal(l)
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return
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self.literal(l[:start])
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self.close_literal()
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sel = l[start + 1]
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#print("*%s=%s=" % (sel, EXPR))
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if sel == self.STMNT:
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end = l.find(self.STMNT_END)
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assert end > 0
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stmt = l[start + len(self.START_CHAR + self.STMNT):end].strip()
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self.parse_statement(stmt)
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end += len(self.STMNT_END)
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l = l[end:]
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if not self.in_literal and l == "\n":
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break
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elif sel == self.EXPR:
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# print("EXPR")
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end = l.find(self.EXPR_END)
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assert end > 0
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expr = l[start + len(self.START_CHAR + self.EXPR):end].strip()
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self.render_expr(expr)
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end += len(self.EXPR_END)
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l = l[end:]
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else:
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self.literal(l[start])
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l = l[start + 1:]
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def header(self):
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self.file_out.write("# Autogenerated file\n")
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def compile(self):
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self.header()
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for l in self.file_in:
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self.parse_line(l)
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self.close_literal()
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return self.seq
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class Loader(compiled.Loader):
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def __init__(self, pkg, dir):
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super().__init__(pkg, dir)
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self.dir = dir
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if pkg == "__main__":
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# if pkg isn't really a package, don't bother to use it
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# it means we're running from "filesystem directory", not
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# from a package.
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pkg = None
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self.pkg_path = ""
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if pkg:
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p = __import__(pkg)
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if isinstance(p.__path__, str):
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# uPy
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self.pkg_path = p.__path__
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else:
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# CPy
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self.pkg_path = p.__path__[0]
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self.pkg_path += "/"
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def input_open(self, template):
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path = self.pkg_path + self.dir + "/" + template
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return open(path)
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def compiled_path(self, template):
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return self.dir + "/" + template.replace(".", "_") + ".py"
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def load(self, name):
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try:
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return super().load(name)
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except (OSError, ImportError):
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pass
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compiled_path = self.pkg_path + self.compiled_path(name)
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f_in = self.input_open(name)
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f_out = open(compiled_path, "w")
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c = Compiler(f_in, f_out, loader=self)
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c.compile()
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f_in.close()
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f_out.close()
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return super().load(name)
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