Toit
#Correct way to read a pipe, for long content?
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davidg238 10/30/2023 06:55 PM
What is the correct way to read stdin?
if I run something like this:
The commented invocations work, but the "fleet status" fails because the list of devices string is truncated, thus:
I only see a read method on the pipe.
if I run something like this:
import host.pipe show *
import encoding.json show *
INHERIT ::= PIPE-INHERITED
invoke command args -> string:
complete-args := [command] + args
output := OpenPipe false
stdout := output.fd
pipes := fork
true // use path
INHERIT
stdout
INHERIT
command
complete-args
pid := pipes[3]
wait_for pid
return output.read.to-string.trim
main args:
/*
print "Version: $(invoke "artemis" ["version"])"
print "Org: $(invoke "artemis" ["org", "list", "--output-format=json"])"
print "Org default: $(invoke "artemis" ["org", "default", "--output-format=json"])"
print "Org members: $(invoke "artemis" ["org", "members", "list", "--output-format=json"])"
print "Default device: $(invoke "artemis" ["device", "default", "--fleet-root=../home", "--output-format=json"])"
// print "Default device status: $(invoke "artemis" ["device", "show", "--fleet-root=../home", "--output-format=json"])"
*/
a-string := invoke "artemis" ["fleet", "status", "--fleet-root=../home", "--output-format=json"]
print "String size $a-string.size"
print a-string
a-list := parse a-stringThe commented invocations work, but the "fleet status" fails because the list of devices string is truncated, thus:
david@MSI-7D43:~/workspaceToit/artemis-facade$ jag run -d host test.toit
String size 1520
<long truncated string goes here>
EXCEPTION error.
OUT_OF_BOUNDS
0: Decoder.handle-error_ <sdk>/encoding/json.toit:479:5
1: Decoder.decode-list_ <sdk>/encoding/json.toit:472:25
2: Decoder.decode_ <sdk>/encoding/json.toit:316:30
3: Decoder.decode <sdk>/encoding/json.toit:306:15
4: parse <sdk>/encoding/json.toit:97:12
5: main test.toit:33:13
Error: exit status 1I only see a read method on the pipe.
floitsch 10/30/2023 06:57 PM
readfloitsch 10/30/2023 06:57 PM
Typically the system flushes bytes when the buffer is full or when a newline is seen.
floitsch 10/30/2023 06:58 PM
If you just want to get the output of a call to a command use
pipe.backticksfloitsch 10/30/2023 06:58 PM
That will collect everything
floitsch 10/30/2023 06:59 PM
You can also have a look there if you need to have a customized version of it. It uses
forkdavidg238 10/30/2023 07:03 PM
ah thx, "backticks" is not a common word for me, so duh I didn't even look
floitsch 10/30/2023 07:04 PM
We discussed renaming it...
floitsch 10/30/2023 07:04 PM
I'm pretty sure a v2 of the package will have a different name(edited)
9 messages in total