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#
#
# The Nim Compiler
# (c) Copyright 2015 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
## implements the module handling
import
ast, astalgo, magicsys, securehash, rodread, msgs, cgendata, sigmatch, options,
idents, os, lexer, idgen, passes, syntaxes, llstream
type
TNeedRecompile* = enum Maybe, No, Yes, Probing, Recompiled
THashStatus* = enum hashNotTaken, hashCached, hashHasChanged, hashNotChanged
TModuleInMemory* = object
compiledAt*: float
hash*: SecureHash
deps*: seq[int32] ## XXX: slurped files are currently not tracked
needsRecompile*: TNeedRecompile
hashStatus*: THashStatus
var
gCompiledModules: seq[PSym] = @[]
gMemCacheData*: seq[TModuleInMemory] = @[]
## XXX: we should implement recycling of file IDs
## if the user keeps renaming modules, the file IDs will keep growing
proc getModule(fileIdx: int32): PSym =
if fileIdx >= 0 and fileIdx < gCompiledModules.len:
result = gCompiledModules[fileIdx]
template hash(x: PSym): expr =
gMemCacheData[x.position].hash
proc hashChanged(fileIdx: int32): bool =
internalAssert fileIdx >= 0 and fileIdx < gMemCacheData.len
template updateStatus =
gMemCacheData[fileIdx].hashStatus = if result: hashHasChanged
else: hashNotChanged
# echo "TESTING Hash: ", fileIdx.toFilename, " ", result
case gMemCacheData[fileIdx].hashStatus:
of hashHasChanged:
result = true
of hashNotChanged:
result = false
of hashCached:
let newHash = secureHashFile(fileIdx.toFullPath)
result = newHash != gMemCacheData[fileIdx].hash
gMemCacheData[fileIdx].hash = newHash
updateStatus()
of hashNotTaken:
gMemCacheData[fileIdx].hash = secureHashFile(fileIdx.toFullPath)
result = true
updateStatus()
proc doHash(fileIdx: int32) =
if gMemCacheData[fileIdx].hashStatus == hashNotTaken:
# echo "FIRST Hash: ", fileIdx.ToFilename
gMemCacheData[fileIdx].hash = secureHashFile(fileIdx.toFullPath)
proc addDep(x: PSym, dep: int32) =
growCache gMemCacheData, dep
gMemCacheData[x.position].deps.safeAdd(dep)
proc resetModule*(fileIdx: int32) =
# echo "HARD RESETTING ", fileIdx.toFilename
if fileIdx <% gMemCacheData.len:
gMemCacheData[fileIdx].needsRecompile = Yes
if fileIdx <% gCompiledModules.len:
gCompiledModules[fileIdx] = nil
if fileIdx <% cgendata.gModules.len:
cgendata.gModules[fileIdx] = nil
proc resetModule*(module: PSym) =
let conflict = getModule(module.position.int32)
if conflict == nil: return
doAssert conflict == module
resetModule(module.position.int32)
initStrTable(module.tab)
proc resetAllModules* =
for i in 0..gCompiledModules.high:
if gCompiledModules[i] != nil:
resetModule(i.int32)
resetPackageCache()
# for m in cgenModules(): echo "CGEN MODULE FOUND"
proc resetAllModulesHard* =
resetPackageCache()
gCompiledModules.setLen 0
gMemCacheData.setLen 0
magicsys.resetSysTypes()
# XXX
#gOwners = @[]
proc checkDepMem(fileIdx: int32): TNeedRecompile =
template markDirty =
resetModule(fileIdx)
return Yes
if gMemCacheData[fileIdx].needsRecompile != Maybe:
return gMemCacheData[fileIdx].needsRecompile
if optForceFullMake in gGlobalOptions or
hashChanged(fileIdx):
markDirty
if gMemCacheData[fileIdx].deps != nil:
gMemCacheData[fileIdx].needsRecompile = Probing
for dep in gMemCacheData[fileIdx].deps:
let d = checkDepMem(dep)
if d in {Yes, Recompiled}:
# echo fileIdx.toFilename, " depends on ", dep.toFilename, " ", d
markDirty
gMemCacheData[fileIdx].needsRecompile = No
return No
proc newModule(fileIdx: int32): PSym =
# We cannot call ``newSym`` here, because we have to circumvent the ID
# mechanism, which we do in order to assign each module a persistent ID.
new(result)
result.id = - 1 # for better error checking
result.kind = skModule
let filename = fileIdx.toFullPath
result.name = getIdent(splitFile(filename).name)
if not isNimIdentifier(result.name.s):
rawMessage(errInvalidModuleName, result.name.s)
result.info = newLineInfo(fileIdx, 1, 1)
result.owner = newSym(skPackage, getIdent(getPackageName(filename)), nil,
result.info)
result.position = fileIdx
growCache gMemCacheData, fileIdx
growCache gCompiledModules, fileIdx
gCompiledModules[result.position] = result
incl(result.flags, sfUsed)
initStrTable(result.tab)
strTableAdd(result.tab, result) # a module knows itself
proc compileModule*(fileIdx: int32, flags: TSymFlags): PSym =
result = getModule(fileIdx)
if result == nil:
growCache gMemCacheData, fileIdx
gMemCacheData[fileIdx].needsRecompile = Probing
result = newModule(fileIdx)
#var rd = handleSymbolFile(result)
var rd: PRodReader
result.flags = result.flags + flags
if gCmd in {cmdCompileToC, cmdCompileToCpp, cmdCheck, cmdIdeTools}:
rd = handleSymbolFile(result)
if result.id < 0:
internalError("handleSymbolFile should have set the module\'s ID")
return
else:
result.id = getID()
if sfMainModule in flags and gProjectIsStdin:
processModule(result, llStreamOpen(stdin), rd)
else:
processModule(result, nil, rd)
if optCaasEnabled in gGlobalOptions:
gMemCacheData[fileIdx].compiledAt = gLastCmdTime
gMemCacheData[fileIdx].needsRecompile = Recompiled
doHash fileIdx
else:
if checkDepMem(fileIdx) == Yes:
result = compileModule(fileIdx, flags)
else:
result = gCompiledModules[fileIdx]
proc importModule*(s: PSym, fileIdx: int32): PSym {.procvar.} =
# this is called by the semantic checking phase
result = compileModule(fileIdx, {})
if optCaasEnabled in gGlobalOptions: addDep(s, fileIdx)
if sfSystemModule in result.flags:
localError(result.info, errAttemptToRedefine, result.name.s)
proc includeModule*(s: PSym, fileIdx: int32): PNode {.procvar.} =
result = syntaxes.parseFile(fileIdx)
if optCaasEnabled in gGlobalOptions:
growCache gMemCacheData, fileIdx
addDep(s, fileIdx)
doHash(fileIdx)
proc `==^`(a, b: string): bool =
try:
result = sameFile(a, b)
except OSError:
result = false
proc compileSystemModule* =
if magicsys.systemModule == nil:
systemFileIdx = fileInfoIdx(options.libpath/"system.nim")
discard compileModule(systemFileIdx, {sfSystemModule})
proc wantMainModule* =
if gProjectFull.len == 0:
fatal(gCmdLineInfo, errCommandExpectsFilename)
gProjectMainIdx = addFileExt(gProjectFull, NimExt).fileInfoIdx
passes.gIncludeFile = includeModule
passes.gImportModule = importModule
proc compileProject*(projectFileIdx = -1'i32) =
wantMainModule()
let systemFileIdx = fileInfoIdx(options.libpath / "system.nim")
let projectFile = if projectFileIdx < 0: gProjectMainIdx else: projectFileIdx
if projectFile == systemFileIdx:
discard compileModule(projectFile, {sfMainModule, sfSystemModule})
else:
compileSystemModule()
discard compileModule(projectFile, {sfMainModule})
proc makeModule*(filename: string): PSym =
result = newModule(fileInfoIdx filename)
result.id = getID()
proc makeStdinModule*(): PSym = makeModule"stdin"
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