shifujun

When I learn Rust's mut keyword and references types, everything seemed logical. Basicly without mut decleared, any member of a struct cannot change.

Until I read to this: https://doc.rust-lang.org/rust-by-example/fn/closures/capture.html

    let mut count = 0;
    // A closure to increment `count` could take either `&mut count` or `count`
    // but `&mut count` is less restrictive so it takes that. Immediately
    // borrows `count`.
 //

shifujun

#!/usr/bin/env kotlin

@file:Repository("https://mirrors.tencent.com/nexus/repository/maven-public/")
@file:DependsOn("io.ktor:ktor-client-core-jvm:1.6.7")
@file:DependsOn("io.ktor:ktor-client-cio-jvm:1.6.7")

import io.ktor.client.*
import io.ktor.client.engine.cio.*
import io.ktor.client.features.*
import io.ktor.client.request.*

shifujun

#!/usr/bin/env sh

cd $(mktemp -d)
echo "\n\n"
echo Step1: use temp dir: $(pwd)

echo "\n\n"
echo Step2: init main-repo
(
  mkdir main-repo

shifujun

sleep 1000 & export job=$! && until ! ps -p $job > /dev/null; do echo running && sleep 2; done && wait $job

explanation:

• sleep 1000: a long time no output command.
• &: put command background.
• export job=$!: $! is pid of command.
• ! ps -p $job > /dev/null: if command has finished.
• echo running && sleep 2: every 2 seconds, output running.