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