txt2deps.nim: new utility

ChangeLog

@@ -1,3 +1,9 @@
+2023-04-25  Anna  <cyber@sysrq.in>
+
+	* nimbus.nim: drop support for patched Nim compilers
+
+	* txt2deps: new utility
+
 2022-07-13  Anna  <cyber@sysrq.in>
 
 	* 0.3.0, 0.3.1 tagged

man/nimbus.1

@@ -135,6 +135,7 @@ ninja
 sudo ninja install
 .Ed
 .Sh SEE ALSO
+.Xr txt2deps 1
 .Bl -bullet -width 1n
 .It
 .Lk https://nim-lang.org/docs/nimc.html "Nim compiler user guide"

man/txt2man.1

@@ -0,0 +1,47 @@
+.\" SPDX-FileType: DOCUMENTATION
+.\" SPDX-FileCopyrightText: 2023 Anna <cyber@sysrq.in>
+.\" SPDX-License-Identifier: BSD-3-Clause
+.Dd April 25, 2023
+.Dt TXT2DEPS 1
+.Os
+.Sh NAME
+.Nm txt2deps
+.Nd convert plain list of files to GCC-style depfiles
+.Sh SYNOPSIS
+.Nm
+.Fl T : Ns Ar path
+.Op Fl i : Ns Ar path
+.Op Fl o : Ns Ar path
+.Sh DESCRIPTION
+The
+.Nm
+utility takes a file with newline-separated list of filenames as input and outputs one
+.Xr make 1
+rule containing the target file name for that source file, a colon, and the names of all the included files.
+.Pp
+The arguments are as follows:
+.Bl -tag -width Ds
+.It Fl T : Ns Ar path
+Target file name.
+.
+.It Fl i : Ns Ar path
+Input file name.
+The default is the standard input.
+.
+.It Fl o : Ns Ar path
+Output file name.
+The default is the standard output.
+.El
+.
+.Sh EXIT STATUS
+.Ex -std
+.Sh EXAMPLES
+Generate a depfile:
+.Dl txt2deps -O test < ~/.cache/nim/test/test.deps > test.d
+.Sh SEE ALSO
+.Xr make 1 ,
+.Xr nimbus 1
+.Sh AUTHORS
+.An -split
+.An Anna
+.Aq Mt cyber@sysrq.in

nimbus.nimble

@@ -8,7 +8,7 @@ author        = "Anna"
 description   = "A Nim build system"
 license       = "BSD"
 
-bin = @["nimbus"]
+bin = @["nimbus", "txt2deps"]
 srcDir = "src"
 installExt = @["nim"]
 

src/nimbs/options.nim

@@ -1,5 +1,5 @@
 # SPDX-FileCopyrightText: Copyright (C) Dominik Picheta. All rights reserved.
-# SPDX-FileCopyrightText: 2022 Anna <cyber@sysrq.in>
+# SPDX-FileCopyrightText: 2023 Anna <cyber@sysrq.in>
 # SPDX-License-Identifier: BSD-3-Clause
 
 import std/[logging, os, parseopt, strutils]
@@ -13,7 +13,7 @@ type
     nimbleDir*: string
     binDir*: string
     nim*: string # Nim compiler location
-    url*: string 
+    url*: string
     sourceDir*: string
     buildDir*: string
     logger*: ConsoleLogger

src/txt2deps.nim

@@ -0,0 +1,80 @@
+# SPDX-FileCopyrightText: 2023 Anna <cyber@sysrq.in>
+# SPDX-License-Identifier: BSD-3-Clause
+
+import std/[os, parseopt, strutils]
+
+type
+  Options = object
+    invalidArguments: bool
+    showHelp: bool
+    target: string
+    inFilePath: string
+    outFilePath: string
+
+const help* = """
+Usage: txt2deps -T:path [-h] [-i:path] [-o:path]
+Converts plain list of files to GCC-style depfile.
+
+arguments:
+  -h, --help  Show this help message and exit.
+  -T:path     Build target.
+  -i:path     Input deps file (default: stdin).
+  -o:path     Output deps file (default: stdout).
+""".strip()
+
+proc writeHelp(status: int = QuitSuccess) =
+  echo(help)
+  quit(status)
+
+proc parseCmdline(): Options =
+  # Init the defaults
+  result.invalidArguments = false
+  result.showHelp = false
+
+  for kind, key, val in getOpt():
+    case kind
+    of cmdLongOption, cmdShortOption:
+      case key.normalize()
+      of "help", "h": result.showHelp = true
+      of "t": result.target = val
+      of "i": result.inFilePath = val
+      of "o": result.outFilePath = val
+      else: result.invalidArguments = true
+    of cmdArgument:
+      result.invalidArguments = true
+    of cmdEnd:
+      discard
+
+  if result.target.len == 0:
+    result.invalidArguments = true
+
+func quoteMake(s: string): string =
+  return s.multiReplace(
+    (" ", "\\ "),
+    ("#", "\\#")
+  )
+
+proc main(options: Options) =
+  var inFile = stdin
+  var outFile = stdout
+
+  if options.inFilePath.len != 0:
+    inFile = open(options.inFilePath)
+
+  if options.outFilePath.len != 0:
+    outFile = open(options.outFilePath, fmWrite)
+
+  outFile.write(options.target.quoteMake & ": \\" & '\n')
+  for line in inFile.lines:
+    if line.len == 0 or not fileExists(line):
+      continue
+    outFile.write('\t' & line.quoteMake & " \\" & '\n')
+  outFile.close()
+
+when isMainModule:
+  let opt = parseCmdLine()
+  if opt.showHelp:
+    writeHelp()
+  if opt.invalidArguments:
+    writeHelp(QuitFailure)
+  main(opt)