On 8/7/20 9:40 AM, Andrew wrote:
Hi,
This code to count lines in a gzipped file exits with "Program exited
with code -9" when run with the latest version of the library, I guess
because I am doing unsafe things. Could someone tell me how to change it
to make it work? The actual program I'm writing processes a file line by
line, so ideally I'd like to keep the structure of open a file, then
foreach over it.
Thanks very much
As of iopipe v0.2.0, io is no longer a required dependency, it's
optional. So you must also add a dependency for io.
I tried adding
dependency "io" version="~>0.3.0"
But it fails with:
Got no configuration for dependency io ~>0.3.1 of hello ~master!?
If I add
dependency "io" version="*"
it works.
I think this is an issue with dub when using an inline recipe file, but
I don't know?
Note that in this simple example, the line count is stored in the line
pipe, you can retreive the number of lines by accessing the `segments`
member of the pipe (undocumented, I have to fix that). So my code looks
like:
---
/+ dub.sdl:
name "hello"
dependency "iopipe" version="~>0.2.0"
dependency "io" version="*"
+/
import std.stdio;
//import std.typecons; // refCounted not @safe
import iopipe.textpipe;
import iopipe.zip;
import iopipe.bufpipe;
import iopipe.refc; // refCounted that is @safe
import std.io : File = File; // just a note, I don't know why you are
renaming here...
void main() @safe // yay @safe!
{
auto counter = 0;
auto fileToRead = File("file.gz").refCounted.bufd
.unzip(CompressionFormat.gzip)
.assumeText
.byLine;
fileToRead.process();
writeln(fileToRead.segments);
}
---
FYI, I noticed that in my simple test, this outputs one less than the
actual lines. I'll have to look into *that* too.
That dependency on writeln also irks me ;) I need to get working on that
iopipe replacement for it...
-Steve
