How to find out if there is a package with certain command in AlpineLinux?

Question

Specifically I'm trying to find out what pakage I have to install in order to get disown command in docker based on Alpine Linux? Moreover it would be nice if someone could enlight me how in general I should seek for missing commands (and in what package they are) so I don't have to come here with every single command.

Answer 1

disown is a bash builtin (job control) just like switch, continue and history. Thus you won't find it in any package list, not just AplineLinux'. I am not sure whether disown is a new feature (thus missing from older releases) or is a optional part. Under Ubuntu bash is v4.3.46 and has it available, though.

For anything else, you'd go to the package contents search.

Answer 2

If you want to use pkgs.alpinelinux.org in a scripted way, you can add html2text in you distribution (for Alpine: apk add html2text) and use this script I've done 10 min ago...:)

#!/bin/sh
file=$1
arch=${2:-x86_64}
branch=${3:-edge}

valid_branch="v3.3 v3.4 v3.5 v3.6 v3.7 v3.8 v3.9 v3.10 edge all"
valid_arch="armv7 s390x ppc64le armhf aarch64 x86 x86_64 all"

usage() {
    echo -e "\nUsage: $0 <pattern> [arch] [branch]\n"
    echo -e "\t<pattern>: Mandatory. Is the file you are searching. Supports wildcards (e.g. wge*) "
    echo -e "\t[arch]: Optional (default:  x86_64). Architecture. Valid values: $valid_arch"
    echo -e "\t[branch]: Optional (default: edge). Alpine releases. Valid values: $valid_branch\n"
    exit 1; 
}

query() {
        curl -s -d"$1" -H "application/x-www-form-urlencoded" -X GET https://pkgs.alpinelinux.org/contents | sed "s/&#x2F;/\//g" | html2text -nobs -ascii | sed /^$/d | sed '1d' | awk /^File/,/*Copy*/ |grep -vE 'Privacy|Policy'
}

if ! [ $file ] ; then usage; fi
echo $valid_arch | grep -qi $arch || ( echo "Invalid arch. Valid values are: $valid_arch"; exit 1 )
echo $valid_branch | grep -qi $branch || ( echo "Invalid branch. Valid values are: $valid_branch"; exit 1 )

if [ $branch == "all" ]; then
    if [ $arch == "all" ]; then
        for b in $valid_branch; do
            query "branch=$b&file=$file"
        done
    else
        for b in $valid_branch; do
            query "branch=$b&file=$file&arch=$arch"
        done
    fi
else
    query "branch=$branch&file=$file&arch=$arch"
fi

UPDATE ON 2022-04-07

You can find this script at https://github.com/fcolista/apkfile