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nimbus-eth2/tools/generate_makefile.nim
Etan Kissling a802e68c9f
handle exceptions in generate_makefile tool ()
Update `generate_makefile` to produce sensible error message in all
exceptional situations, instead of just some of them. These may surface
as one of the first things to someone getting started with the repo.
2024-03-01 16:15:23 +01:00

148 lines
4.6 KiB
Nim

# beacon_chain
# Copyright (c) 2020-2024 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.push raises: [].}
# Generate a Makefile from the JSON file produce by the Nim compiler with
# "--compileOnly". Suitable for Make-controlled parallelisation, down to the GCC
# LTO level.
import std/[json, os, strutils]
# Ripped off from Nim's `linkViaResponseFile()` in "compiler/extccomp.nim".
# It lets us get around a command line length limit on Windows.
proc processLinkCmd(cmd, linkerArgs: string): string {.raises: [IOError].} =
# Extracting the linker.exe here is a bit hacky but the best solution
# given ``buildLib``'s design.
var
i = 0
last = 0
if cmd.len > 0 and cmd[0] == '"':
inc i
while i < cmd.len and cmd[i] != '"': inc i
last = i
inc i
else:
while i < cmd.len and cmd[i] != ' ': inc i
last = i
while i < cmd.len and cmd[i] == ' ': inc i
let args = cmd.substr(i)
writeFile(linkerArgs, args.replace('\\', '/'))
return cmd.substr(0, last) & " @" & linkerArgs
proc main() =
let nrParams = paramCount()
if nrParams != 2:
echo "Usage: ", paramStr(0), " input.json output.makefile"
quit(QuitFailure)
let
jsonPath = paramStr(1)
makefilePath = paramStr(2)
if not fileExists(jsonPath):
echo "No such file: ", jsonPath
quit(QuitFailure)
let
data =
try:
json.parseFile(jsonPath)
except IOError as exc:
echo "Failed to parse file: ", jsonPath, " - [IOError]: ", exc.msg
quit(QuitFailure)
except Exception as exc:
echo "Failed to parse file: ", jsonPath, " - [Exception]: ", exc.msg
quit(QuitFailure)
makefile =
try:
open(makefilePath, fmWrite)
except IOError as exc:
echo "Failed to open file: ", makefilePath, " - [IOError]: ", exc.msg
quit(QuitFailure)
defer:
makefile.close()
var
objectPath: string
found: bool
cmd: string
try:
try:
for compile in data["compile"]:
cmd = compile[1].getStr().replace('\\', '/')
objectPath = ""
found = false
for token in split(cmd, Whitespace + {'\''}):
if found and token.len > 0 and token.endsWith(".o"):
objectPath = token
break
if token == "-o":
found = true
if found == false or objectPath == "":
echo "Could not find the object file in this command: ", cmd
quit(QuitFailure)
try:
makefile.writeLine("$#: $#" % [
objectPath.replace('\\', '/'),
compile[0].getStr().replace('\\', '/')])
makefile.writeLine("\t+ $#\n" % cmd)
except ValueError:
# https://github.com/nim-lang/Nim/pull/23356
raiseAssert "Arguments match the format string"
except KeyError:
echo "File lacks `compile` key: ", jsonPath
quit(QuitFailure)
var objects: seq[string]
try:
for obj in data["link"]:
objects.add(obj.getStr().replace('\\', '/'))
except KeyError:
echo "File lacks `link` key: ", jsonPath
quit(QuitFailure)
try:
makefile.writeLine("OBJECTS := $#\n" % objects.join(" \\\n"))
except ValueError:
# https://github.com/nim-lang/Nim/pull/23356
raiseAssert "Arguments match the format string"
makefile.writeLine(".PHONY: build")
makefile.writeLine("build: $(OBJECTS)")
let linkerArgs = makefilePath & ".linkerArgs"
try:
makefile.writeLine("\t+ $#" % processLinkCmd(
data["linkcmd"].getStr().replace('\\', '/'), linkerArgs))
except IOError as exc:
echo "Failed to write file: ", linkerArgs, " - [IOError]: ", exc.msg
quit(QuitFailure)
except ValueError:
# https://github.com/nim-lang/Nim/pull/23356
raiseAssert "Arguments match the format string"
if data.hasKey("extraCmds"):
try:
for cmd in data["extraCmds"]:
try:
makefile.writeLine("\t+ $#" % cmd.getStr().replace('\\', '/'))
except ValueError:
# https://github.com/nim-lang/Nim/pull/23356
raiseAssert "Arguments match the format string"
except KeyError:
raiseAssert "just checked"
except IOError as exc:
echo "Failed to write file: ", makefilePath, " - [IOError]: ", exc.msg
quit(QuitFailure)
main()