Hello nim lovers! Another portion of dumb questions from nim newbie
1) Consider this project structure:
app.nimble
app/
- version.txt # contains "0.1.1-3"
- utils.nim
utils.nim contains getVersion helper which just reads from file:
proc getVersion*(versionFile:string): seq[string] =
staticRead(versionFile).split('-') # static is required because I need
this value at compile time
app.nimble:
const
versionFile = "app/version.txt"
# ...
task version, "Get version":
echo "Proc call: " & $(getVersion(versionFile))
echo "Inline call: " & $(staticRead(versionFile).split('-'))
Now here is the magic:
> nimble version
Executing task version in .../app.nimble
Proc call: @[0.1] <-- WTF?!
Inline call: @[0.1.1, 3]
Okay, it looks like calling staticRead is cached somehow when using a proc
(cause I had "0.1" some time ago). But why, and how to avoid it?
2) My versionFile must be defined **relative to `utils.nim` location** because
that's where staticRead resides. If I move utils somewhere else, I would need
to change versionFile's path which is absolutely terrible!
3) Also, just curious why we have to use staticRead at all? Looks like const
already marks expressions as compile-time:
const
constEval = contains("abc", 'b') # computed at compile time, no need to
use staticContains or smth
data = readFile("somefile") # <-- OOPS! doesn't work at compile time
data = staticRead("somefile") # <-- will work
Cannot nim distinguish between compile/runtime and call appropriate read
function accordingly?
