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https://reproducible-builds.org/ support via SOURCE_DATE_EPOCH (#7644) #7661

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Apr 20, 2018
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https://reproducible-builds.org/ support via SOURCE_DATE_EPOCH (#7644) #7661

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19 changes: 17 additions & 2 deletions compiler/semfold.nim
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Original file line number Diff line number Diff line change
Expand Up @@ -483,6 +483,19 @@ proc newSymNodeTypeDesc*(s: PSym; info: TLineInfo): PNode =

proc getConstExpr(m: PSym, n: PNode): PNode =
result = nil

proc getSrcTimestamp(): DateTime =
try:
result = utc(fromUnix(parseInt(getEnv("SOURCE_DATE_EPOCH",
"not a number"))))
except ValueError:
# Environment variable malformed.
# https://reproducible-builds.org/specs/source-date-epoch/: "If the
# value is malformed, the build process SHOULD exit with a non-zero
# error code", which this doesn't do. This uses local time, because
# that maintains compatibility with existing usage.
result = local(getTime())

case n.kind
of nkSym:
var s = n.sym
Expand All @@ -492,8 +505,10 @@ proc getConstExpr(m: PSym, n: PNode): PNode =
of skConst:
case s.magic
of mIsMainModule: result = newIntNodeT(ord(sfMainModule in m.flags), n)
of mCompileDate: result = newStrNodeT(times.getDateStr(), n)
of mCompileTime: result = newStrNodeT(times.getClockStr(), n)
of mCompileDate: result = newStrNodeT(format(getSrcTimestamp(),
"yyyy-MM-dd"), n)
of mCompileTime: result = newStrNodeT(format(getSrcTimestamp(),
"HH:mm:ss"), n)
of mCpuEndian: result = newIntNodeT(ord(CPU[targetCPU].endian), n)
of mHostOS: result = newStrNodeT(toLowerAscii(platform.OS[targetOS].name), n)
of mHostCPU: result = newStrNodeT(platform.CPU[targetCPU].name.toLowerAscii, n)
Expand Down