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add_c_file: Rename variables based on the type of path

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* fname for generic file paths
* tor_fname for paths relative to the top-level tor directory
* src_fname for paths relative to tor's src directory

With prefixes as required to disambiguate different paths of the same
type.

Part of 32962.
This commit is contained in:
teor 2020-01-16 09:15:22 +10:00
parent b828588499
commit eb336e23a6
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GPG Key ID: 10FEAA0E7075672A
1 changed files with 51 additions and 50 deletions
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101
scripts/maint/add_c_file.py
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@ -29,17 +29,17 @@ import os
import re import re
import time import time
def tordir_file(name): def tordir_file(fname):
"""Make name relative to the current directory, which should be the """Make fname relative to the current directory, which should be the
top-level tor directory. Also performs basic path simplifications.""" top-level tor directory. Also performs basic path simplifications."""
return os.path.normpath(os.path.relpath(name)) return os.path.normpath(os.path.relpath(fname))
def srcdir_file(name): def srcdir_file(tor_fname):
"""Make name relative to tor's "src" directory. """Make tor_fname relative to tor's "src" directory.
Also performs basic path simplifications. Also performs basic path simplifications.
(This function takes paths relative to the top-level tor directory, (This function takes paths relative to the top-level tor directory,
but outputs a path that is relative to tor's src directory.)""" but outputs a path that is relative to tor's src directory.)"""
return os.path.normpath(os.path.relpath(name, 'src')) return os.path.normpath(os.path.relpath(tor_fname, 'src'))
def guard_macro(src_fname): def guard_macro(src_fname):
"""Return the guard macro that should be used for the header file """Return the guard macro that should be used for the header file
@ -48,13 +48,13 @@ def guard_macro(src_fname):
td = src_fname.replace(".", "_").replace("/", "_").upper() td = src_fname.replace(".", "_").replace("/", "_").upper()
return "TOR_{}".format(td) return "TOR_{}".format(td)
def makeext(name, new_extension): def makeext(fname, new_extension):
"""Replace the extension for the file called 'name' with 'new_extension'. """Replace the extension for the file called 'fname' with 'new_extension'.
This function takes and returns paths relative to either the top-level This function takes and returns paths relative to either the top-level
tor directory, or tor's src directory, and returns the same kind tor directory, or tor's src directory, and returns the same kind
of path. of path.
""" """
base = os.path.splitext(name)[0] base = os.path.splitext(fname)[0]
return base + "." + new_extension return base + "." + new_extension
def instantiate_template(template, tor_fname): def instantiate_template(template, tor_fname):
@ -154,11 +154,11 @@ class AutomakeChunk:
return False return False
def insertMember(self, member): def insertMember(self, new_tor_fname):
""" """
Add a new member to this chunk. Try to insert it in alphabetical Add a new file name new_tor_fname to this chunk. Try to insert it in
order with matching indentation, but don't freak out too much if the alphabetical order with matching indentation, but don't freak out too
source isn't consistent. much if the source isn't consistent.
Assumes that this chunk is of the form: Assumes that this chunk is of the form:
FOOBAR = \ FOOBAR = \
@ -175,20 +175,21 @@ class AutomakeChunk:
m = re.match(r'(\s+)(\S+)(\s+)\\', line) m = re.match(r'(\s+)(\S+)(\s+)\\', line)
if not m: if not m:
continue continue
prespace, fname, postspace = m.groups() prespace, cur_tor_fname, postspace = m.groups()
if fname > member: if cur_tor_fname > new_tor_fname:
self.insert_before(lineno, member, prespace, postspace) self.insert_before(lineno, new_tor_fname, prespace, postspace)
return return
self.insert_at_end(member, prespace, postspace) self.insert_at_end(new_tor_fname, prespace, postspace)
def insert_before(self, lineno, member, prespace, postspace): def insert_before(self, lineno, new_tor_fname, prespace, postspace):
self.lines.insert(lineno, self.lines.insert(lineno,
"{}{}{}\\\n".format(prespace, member, postspace)) "{}{}{}\\\n".format(prespace, new_tor_fname,
postspace))
def insert_at_end(self, member, prespace, postspace): def insert_at_end(self, new_tor_fname, prespace, postspace):
lastline = self.lines[-1].strip() lastline = self.lines[-1].strip()
self.lines[-1] = '{}{}{}\\\n'.format(prespace, lastline, postspace) self.lines[-1] = '{}{}{}\\\n'.format(prespace, lastline, postspace)
self.lines.append("{}{}\n".format(prespace, member)) self.lines.append("{}{}\n".format(prespace, new_tor_fname))
def dump(self, f): def dump(self, f):
"""Write all the lines in this chunk to the file 'f'.""" """Write all the lines in this chunk to the file 'f'."""
@ -215,15 +216,15 @@ class ParsedAutomake:
self.chunks.append(chunk) self.chunks.append(chunk)
self.by_type[chunk.kind.lower()] = chunk self.by_type[chunk.kind.lower()] = chunk
def add_file(self, fname, kind): def add_file(self, tor_fname, kind):
"""Insert a file of kind 'kind' to the appropriate section of this """Insert a file tor_fname of kind 'kind' to the appropriate
file. Return True if we added it. section of this file. Return True if we added it.
This function operates on paths relative to the top-level tor This function operates on paths relative to the top-level tor
directory. directory.
""" """
if kind.lower() in self.by_type: if kind.lower() in self.by_type:
self.by_type[kind.lower()].insertMember(fname) self.by_type[kind.lower()].insertMember(tor_fname)
return True return True
else: else:
return False return False
@ -233,9 +234,9 @@ class ParsedAutomake:
for chunk in self.chunks: for chunk in self.chunks:
chunk.dump(f) chunk.dump(f)
def get_include_am_location(fname): def get_include_am_location(tor_fname):
"""Find the right include.am file for introducing a new file. Return None """Find the right include.am file for introducing a new file
if we can't guess one. tor_fname. Return None if we can't guess one.
Note that this function is imperfect because our include.am layout is Note that this function is imperfect because our include.am layout is
not (yet) consistent. not (yet) consistent.
@ -243,20 +244,20 @@ def get_include_am_location(fname):
This function operates on paths relative to the top-level tor directory. This function operates on paths relative to the top-level tor directory.
""" """
# Strip src for pattern matching, but add it back when returning the path # Strip src for pattern matching, but add it back when returning the path
td = srcdir_file(fname) src_fname = srcdir_file(tor_fname)
m = re.match(r'^(lib|core|feature|app)/([a-z0-9_]*)/', td) m = re.match(r'^(lib|core|feature|app)/([a-z0-9_]*)/', src_fname)
if m: if m:
return "src/{}/{}/include.am".format(m.group(1),m.group(2)) return "src/{}/{}/include.am".format(m.group(1),m.group(2))
if re.match(r'^test/', td): if re.match(r'^test/', src_fname):
return "src/test/include.am" return "src/test/include.am"
return None return None
def run(fn): def run(fname):
""" """
Create a new C file and H file corresponding to the filename "fn", and Create a new C file and H file corresponding to the filename "fname",
add them to the corresponding include.am. and add them to the corresponding include.am.
This function operates on paths relative to the top-level tor directory. This function operates on paths relative to the top-level tor directory.
""" """
@ -266,31 +267,31 @@ def run(fn):
assert(os.path.isdir("src")) assert(os.path.isdir("src"))
# Make the file name relative to the top-level tor directory # Make the file name relative to the top-level tor directory
fn = tordir_file(fn) tor_fname = tordir_file(fname)
# And check that we're adding files to the "src" directory, # And check that we're adding files to the "src" directory,
# with canonical paths # with canonical paths
assert(fn[:4] == "src/") assert(tor_fname[:4] == "src/")
cf = makeext(fn, "c") c_tor_fname = makeext(tor_fname, "c")
hf = makeext(fn, "h") h_tor_fname = makeext(tor_fname, "h")
if os.path.exists(cf): if os.path.exists(c_tor_fname):
print("{} already exists".format(cf)) print("{} already exists".format(c_tor_fname))
return 1 return 1
if os.path.exists(hf): if os.path.exists(h_tor_fname):
print("{} already exists".format(hf)) print("{} already exists".format(h_tor_fname))
return 1 return 1
with open(cf, 'w') as f: with open(c_tor_fname, 'w') as f:
f.write(instantiate_template(C_FILE_TEMPLATE, cf)) f.write(instantiate_template(C_FILE_TEMPLATE, c_tor_fname))
with open(hf, 'w') as f: with open(h_tor_fname, 'w') as f:
f.write(instantiate_template(HEADER_TEMPLATE, hf)) f.write(instantiate_template(HEADER_TEMPLATE, h_tor_fname))
iam = get_include_am_location(cf) iam = get_include_am_location(c_tor_fname)
if iam is None or not os.path.exists(iam): if iam is None or not os.path.exists(iam):
print("Made files successfully but couldn't identify include.am for {}" print("Made files successfully but couldn't identify include.am for {}"
.format(cf)) .format(c_tor_fname))
return 1 return 1
amfile = ParsedAutomake() amfile = ParsedAutomake()
@ -302,8 +303,8 @@ def run(fn):
cur_chunk = AutomakeChunk() cur_chunk = AutomakeChunk()
amfile.addChunk(cur_chunk) amfile.addChunk(cur_chunk)
amfile.add_file(cf, "sources") amfile.add_file(c_tor_fname, "sources")
amfile.add_file(hf, "headers") amfile.add_file(h_tor_fname, "headers")
with open(iam+".tmp", 'w') as f: with open(iam+".tmp", 'w') as f:
amfile.dump(f) amfile.dump(f)