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Add --genCDeps for better integration with CMake (#20950)

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* add gencdeps option

* add case statement

* Update compiler/main.nim

* Update compiler/main.nim

* Apply suggestions from code review

Fixes

Co-authored-by: Andreas Rumpf <rumpf_a@web.de>

Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
This commit is contained in:
Jaremy Creechley 2022-11-29 07:27:48 -07:00 • committed by GitHub
commit 5658e8e5c5
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3 changed files with 26 additions and 0 deletions
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22
compiler/main.nim
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@ -47,6 +47,26 @@ proc writeDepsFile(g: ModuleGraph) =
f.writeLine(toFullPath(g.config, k))
f.close()
proc writeCMakeDepsFile(conf: ConfigRef) =
## write a list of C files for build systems like CMake.
## only updated when the C file list changes.
let fname = getNimcacheDir(conf) / conf.outFile.changeFileExt("cdeps")
# generate output files list
var cfiles: seq[string] = @[]
for it in conf.toCompile: cfiles.add(it.cname.string)
let fileset = cfiles.toCountTable()
# read old cfiles list
var fl: File
var prevset = initCountTable[string]()
if open(fl, fname.string, fmRead):
for line in fl.lines: prevset.inc(line)
fl.close()
# write cfiles out
if fileset != prevset:
fl = open(fname.string, fmWrite)
for line in cfiles: fl.writeLine(line)
fl.close()
proc commandGenDepend(graph: ModuleGraph) =
semanticPasses(graph)
registerPass(graph, gendependPass)
@ -126,6 +146,8 @@ proc commandCompileToC(graph: ModuleGraph) =
extccomp.writeJsonBuildInstructions(conf)
if optGenScript in graph.config.globalOptions:
writeDepsFile(graph)
if optGenCDeps in graph.config.globalOptions:
writeCMakeDepsFile(conf)
proc commandJsonScript(graph: ModuleGraph) =
extccomp.runJsonBuildInstructions(graph.config, graph.config.jsonBuildInstructionsFile)