DEV Community: Siedos Sistemas e Resultados

Automatizando Backups no PostgreSQL

João Carlos Ottobboni — Sun, 21 Mar 2021 03:28:44 +0000

Utilizando comandos do PostgreSQL sem digitar senha

João Carlos Ottobboni for Siedos Sistemas e Resultados ・ Mar 21 '21

Enviando mensagens no slack com shell script

João Carlos Ottobboni for Siedos Sistemas e Resultados ・ Mar 21 '21

Agora que você esta pronto, Vamos lá !
Recentemente, precisei criar alguns scripts para implementar backups automatizados para o meu ambiente de produção com o PostgreSQL. Desenvolvi um script de backup no ambiente de produção e salvo o backup no servidor de homologação para posterior restauração.
Usando o cronjob, você possui uma a automatização da execução desses backups . Os scripts produzem os seguintes formatos de backups:
Backup simples: produz uma versão gzip do script SQL
Backup personalizado: produz um arquivo compactado em formato personalizado, adequado para entrada no pg_restore.
Crie o arquivo pg_backup.sh e cole o seguinte conteúdo nele.

Agora precisamos conceder ao script permissão de execução

chomd +x pg_backup.sh

Os comando scp envia uma cópia do backup para outro servidor, neste exemplo, envio para o meu servidor de homologação para manter uma copia atual todos os dias em homologação, além da redundância ao guardar o arquivo sempre que preciso restaurar a base de homologação ja tenho um arquivo no servidor, mas você pode enviar para qualquer máquina que desejar, para este comando funcionar sem a necessidade de digitar a senha, é necessário copiar sua chave ssh para o servidor com este comando:

ssh-copy-id -i ~/.ssh/id_rsa.pub 'user'@'server-address-or-ip'

Por último para que esse backup seja executado automaticamente precisamos criar uma entrada no agendador de tarefas do linux, digite o comando para abrir o crontab:

crontab -e

Agora insira esta linha no arquivo

# PostgreSQL Backup
 00 00 * * * /path/to/script/pg_backup.sh

Utilizando comandos do PostgreSQL sem digitar senha

João Carlos Ottobboni — Sun, 21 Mar 2021 03:16:56 +0000

As vezes você precisa utilizar comandos no terminal ou executa-los em scripts, e as senhas podem ser um problema para se lidar, agora não mais:

Fornecendo a senha com arquivo de senhas

Criando o arquivo de configuração

$ touch ~/.pgpass
$ chmod 0600 ~/.pgpass

Cada linha no arquivo define uma credencial para conexão

localhost:5432:project_a_db:jcottobboni:0yRkckAF8lYB 192.168.1.50:5432:project_b_db:jack:mCtEtSd8F08P 10.2.50.150:*:*:alice:flx1me0cTUJV

Assim você consegue executar comandos no terminal ou dentro de arquivos bash sem precisar digitar uma senha.

pg_dump -U jcottobboni -h localhost -p 5432 -Fc project_a_db > /home/jcottobboni/backup_for_project_a_db

Não e obrigatório utilizar o mesmo caminho para o arquivo especificado na criação do arquivo, o postgres fornece a configuração para customização do caminho.

export PGPASSFILE=~/.mycustomfile

O parâmetro -w

w, — no-password nunca emita um prompt de senha. Se o servidor exigir autenticação por senha e uma senha não estiver disponível por outros meios, como um arquivo .pgpass, a tentativa de conexão falhará. Essa opção pode ser útil em tarefas em lote e scripts em que nenhum usuário está presente para inserir uma senha

Fornecendo senha utilizando variáveis de ambiente

Outra maneira é definir variáveis de ambiente, você pode definir PGHOST, PGPORT, PGDATABASE, PGUSER e PGPASSWORD e usá-lo em seus scripts

Referências
PostgreSQL 9.3.4 Documentation — libpq — Environment Variables
PostgreSQL 9.3.4 Documentation — libpq — The Password File

Instalando versões antigas do Ruby com Rbenv

João Carlos Ottobboni — Sun, 21 Mar 2021 03:08:55 +0000

Até aonde eu testei e tive experiência as versões do Ruby menores de 2.4 necessitam que esteja instalado a libssl 1.0 no linux, enquanto que as versões maiores que 2.4 requerem que esteja instalada a libssl com versão maior que 1.1.
Os dois pacotes entram em conflito um com o outro, então você não poder ter os dois instalados. Parece uma coisa besta para se escrever aqui, mas me salvou na hora da instalação para trabalhar com projetos mais antigos, então vamos lá.

para ruby <2.4

sudo apt install libssl1.0-dev 
rbenv install 'version'

para ruby >2.4

sudo apt install libssl-dev 
rbenv install 'version'

Enviando mensagens no slack com shell script

João Carlos Ottobboni — Sun, 21 Mar 2021 03:05:25 +0000

Slack CLI
Copie o conteúdo abaixo e crie um arquivo chamado slack-cli

bindir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
etcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

if [ -n "${SLACK_CLI_TOKEN}" ]; then
  token="${SLACK_CLI_TOKEN}"
elif [ -r "${etcdir}/.slack" ] && [ -f "${etcdir}/.slack" ]; then
  token=$(sed -n '1p' < "${etcdir}/.slack")
elif [ -r "${HOME}/.slack" ] && [ -f "${HOME}/.slack" ]; then
  token=$(sed -n '1p' < "${HOME}/.slack")
elif [ -r "/etc/.slack" ] && [ -f "/etc/.slack" ]; then
  token=$(sed -n '1p' < "/etc/.slack")
fi

# COMMAND PARSING #################################################################################
cmd="${1}" ; shift

# SUBCOMMAND PARSING ##############################################################################
case "${cmd}${1}" in
  chatdelete|chatsend|chatupdate|\
  filedelete|fileinfo|filelist|fileupload|\
  presenceactive|presenceaway|\
  reminderadd|remindercomplete|reminderdelete|reminderinfo|reminderlist| \
  snoozeend|snoozeinfo|snoozestart|\
  statusclear|statusedit)
    sub=${1} ; shift
  ;;
esac

# PIPE FRIENDLINESS ###############################################################################
case "${cmd}${sub}" in
  chatsend|chatupdate|fileupload) [ -p /dev/stdin ] && stdin=$(cat <&0) ;;
esac

# ARGUMENT AND OPTION PARSING #####################################################################
while (( "$#" )); do
  case "${1}" in
    --actions=*) actions=${1/--actions=/''} ; shift ;;
    --actions*|-a*) actions=${2} ; shift ; shift ;;
    --author-icon=*) authoricon=${1/--author-icon=/''} ; shift ;;
    --author-icon*|-ai*) authoricon=${2} ; shift ; shift ;;
    --author-link=*) authorlink=${1/--author-link=/''} ; shift ;;
    --author-link*|-al*) titlelink=${2} ; shift ; shift ;;
    --author=*) author=${1/--author=/''} ; shift ;;
    --author*|-at*) author=${2} ; shift ; shift ;;
    --channels=*) channels=${1/--channels=/''} ; shift ;;
    --channels*|-chs*) channels=${2} ; shift ; shift ;;
    --channel=*) channel=${1/--channel=/''} ; shift ;;
    --channel*|-ch*) channel=${2} ; shift ; shift ;;
    --color=*) color=${1/--color=/''} ; shift ;;
    --color*|-cl*) color=${2} ; shift ; shift ;;
    --compact|-cp) compact='-c' ; shift ;;
    --comment=*) comment=${1/--comment=/''} ; shift ;;
    --comment*|-cm*) comment=${2} ; shift ; shift ;;
    --count=*) count=${1/--count=/''} ; shift ;;
    --count|-cn*) count=${2} ; shift ; shift ;;
    --emoji=*) emoji=${1/--emoji=/''} ; shift ;;
    --emoji*|-em*) emoji=${2} ; shift ; shift ;;
    --fields=*) fields=${1/--fields=/''} ; shift ;;
    --fields*|-flds*) fields=${2} ; shift ; shift ;;
    --filename=*) filename=${1/--filename=/''} ; shift ;;
    --filename*|-fln*) filename=${2} ; shift ; shift ;;
    --filetype=*) filetype=${1/--filetype=/''} ; shift ;;
    --filetype*|-flt*) filetype=${2} ; shift ; shift ;;
    --file=*) file=${1/--file=/''} ; shift ;;
    --file*|-fl*) file=${2} ; shift ; shift ;;
    --filter=*) filter=${1/--filter=/''} ; shift ;;
    --filter*|-f*) filter=${2} ; shift ; shift ;;
    --footer-icon=*) footericon=${1/--footer-icon=/''} ; shift ;;
    --footer-icon*|-fi*) footericon=${2} ; shift ; shift ;;
    --footer=*) footer=${1/--footer=/''} ; shift ;;
    --footer*|-ft*) footer=${2} ; shift ; shift ;;
    --image=*) image=${1/--image-url=/''} ; shift ;;
    --image*|-im*) image=${2} ; shift ; shift ;;
    --monochrome|-m) monochrome='-M' ; shift ;;
    --minutes=*) minutes=${1/--minutes=/''} ; shift ;;
    --minutes*|-mn*) minutes=${2} ; shift ; shift ;;
    --page=*) page=${1/--page=/''} ; shift ;;
    --page|-pg*) page=${2} ; shift ; shift ;;
    --pretext=*) pretext=${1/--pretext=/''} ; shift ;;
    --pretext*|-pt*) pretext=${2} ; shift ; shift ;;
    --reminder=*) reminder=${1/--reminder=/''} ; shift ;;
    --reminder|-rm*) reminder=${2} ; shift ; shift ;;
    --text=*) text=${1/--text=/''} ; shift ;;
    --text*|-tx*) text=${2} ; shift ; shift ;;
    --thumbnail=*) thumbnail=${1/--thumbnail=/''} ; shift ;;
    --thumbnail*|-th*) thumbnail=${2} ; shift ; shift ;;
    --time=*) _time=${1/--time=/''} ; shift ;;
    --time|-tm*) _time=${2} ; shift ; shift ;;
    --timestamp-from=*) timestampfrom=${1/--timestampfrom=/''} ; shift ;;
    --timestamp-from|-tf*) timestampfrom=${2} ; shift ; shift ;;
    --timestamp-to=*) timestampto=${1/--timestampto=/''} ; shift ;;
    --timestamp-to|-tt*) timestampto=${2} ; shift ; shift ;;
    --timestamp=*) timestamp=${1/--timestamp=/''} ; shift ;;
    --timestamp*|-ts*) timestamp=${2} ; shift ; shift ;;
    --title-link=*) titlelink=${1/--title-link=/''} ; shift ;;
    --title-link*|-tl*) titlelink=${2} ; shift ; shift ;;
    --title=*) title=${1/--title=/''} ; shift ;;
    --title*|-ti*) title=${2} ; shift ; shift ;;
    --token=*) token=${1/--token=/''} ; shift ;;
    --token|-tk*) token=${2} ; shift ; shift ;;
    --trace|-x) trace='set -x' ; shift ;;
    --types=*) types=${1/--types=/''} ; shift ;;
    --types|-ty*) types=${2} ; shift ; shift ;;
    --user=*) user=${1/--user=/''} ; shift ;;
    --user|-ur*) user=${2} ; shift ; shift ;;
    *)
      case "${cmd}${sub}" in
        chatdelete)
          [ -n "${1}" ] && [ -n "${timestamp}" ] && [ -z "${channel}" ] && channel=${1}
          [ -n "${1}" ] && [ -z "${timestamp}" ] && timestamp=${1}
        ;;
        chatsend)
          [ -n "${1}" ] && [ -n "${text}" ] && [ -z "${channel}" ] && channel=${1}
          [ -n "${1}" ] && [ -z "${text}" ] && text=${1}
        ;;
        chatupdate)
          [ -n "${1}" ] && [ -n "${text}" ] && [ -n "${timestamp}" ] && [ -z "${channel}" ] && channel=${1}
          [ -n "${1}" ] && [ -n "${text}" ] && [ -z "${timestamp}" ] && timestamp=${1}
          [ -n "${1}" ] && [ -z "${text}" ] && text=${1}
        ;;
        filedelete|fileinfo)
          [ -n "${1}" ] && [ -z "${file}" ] && file=${1}
        ;;
        fileupload)
          [ -n "${1}" ] && [ -n "${file}" ] && [ -z "${channels}" ] && channels=${1}
          [ -n "${1}" ] && [ -z "${file}" ] && file=${1}
        ;;
        snoozeinfo)
          [ -n "${1}" ] && [ -z "${user}" ] && user=${1}
        ;;
        snoozestart)
          [ -n "${1}" ] && [ -z "${minutes}" ] && minutes=${1}
        ;;
        statusedit)
          [ -n "${1}" ] && [ -n "${text}" ] && [ -z "${emoji}" ] && emoji=${1}
          [ -n "${1}" ] && [ -z "${text}" ] && text=${1}
        ;;
        reminderadd)
          [ -n "${1}" ] && [ -n "${text}" ] && [ -z "${_time}" ] && _time=${1}
          [ -n "${1}" ] && [ -z "${text}" ] && text=${1}
        ;;
        remindercomplete|reminderdelete|reminderinfo)
          [ -n "${1}" ] && [ -z "${reminder}" ] && reminder=${1}
        ;;
      esac
      shift
    ;;
  esac
done

# TRACING #########################################################################################
${trace}

# ARGUMENT AND OPTION PROMPTING ###################################################################
case "${cmd}${sub}" in
  chatdelete)
    [ -z "${channel}" ] && read -e -p 'Enter channel (e.g. #general): ' channel
    [ -z "${timestamp}" ] && read -e -p 'Enter timestamp (e.g. 1405894322.002768): ' timestamp
  ;;
  chatsend)
    [ -z "${channel}" ] && [ -z "${text}" ] && prompt='true'
    [ -n "${prompt}" ] && [ -z "${actions}" ] && read -e -p 'Enter actions (e.g. {"type": “button", "style": "primary", "text": "my text", "url": "http://example.com"}, ...): ' actions
    [ -n "${prompt}" ] && [ -z "${author}" ] && read -e -p 'Enter author name (e.g. slackbot): ' author
    [ -n "${prompt}" ] && [ -z "${authoricon}" ] && read -e -p 'Enter author icon (e.g. a URL): ' authoricon
    [ -n "${prompt}" ] && [ -z "${authorlink}" ] && read -e -p 'Enter author link (e.g. a URL): ' authorlink
    [ -z "${channel}" ] && read -e -p 'Enter channel (e.g. #general): ' channel
    [ -n "${prompt}" ] && [ -z "${color}" ] && read -e -p 'Enter color (e.g. good): ' color
    [ -n "${prompt}" ] && [ -z "${fields}" ] && read -e -p 'Enter fields (e.g. {"title": "My Field Title", "value": "My field value", "short": true}, ...): ' fields
    [ -n "${prompt}" ] && [ -z "${footer}" ] && read -e -p 'Enter footer (e.g. Hello footer!): ' footer
    [ -n "${prompt}" ] && [ -z "${footericon}" ] && read -e -p 'Enter footer icon (e.g. a URL): ' footericon
    [ -n "${prompt}" ] && [ -z "${image}" ] && read -e -p 'Enter image (e.g. a URL): ' image
    [ -n "${prompt}" ] && [ -z "${pretext}" ] && read -e -p 'Enter pretext (e.g. Hello pretext!): ' pretext
    [ -z "${text}" ] && read -e -p 'Enter text (e.g. Hello text!): ' text
    [ -n "${prompt}" ] && [ -z "${thumbnail}" ] && read -e -p 'Enter thumbnail (e.g. a URL): ' thumbnail
    [ -n "${prompt}" ] && [ -z "${_time}" ] && read -e -p 'Enter time (e.g. 123456789): ' _time
    [ -n "${prompt}" ] && [ -z "${title}" ] && read -e -p 'Enter title (e.g. Hello title!): ' title
    [ -n "${prompt}" ] && [ -z "${titlelink}" ] && read -e -p 'Enter title link (e.g. a URL): ' titlelink
  ;;
  chatupdate)
    [ -z "${text}" ] && read -e -p 'Enter text (e.g. Hello World!): ' text
    [ -z "${timestamp}" ] && read -e -p 'Enter timestamp (e.g. 1405894322.002768): ' timestamp
    [ -z "${channel}" ] && read -e -p 'Enter channel (e.g. #general): ' channel
  ;;
  filedelete)
    [ -z "${file}" ] && read -e -p 'Enter file (e.g. F2147483862): ' file
  ;;
  fileinfo)
    [ -z "${file}" ] && read -e -p 'Enter file (e.g. F2147483862): ' file
  ;;
  fileupload)
    [ -z "${file}" ] && read -e -p 'Enter file (e.g. file.log): ' file
    [ -z "${channels}" ] && read -e -p 'Enter channels (e.g. #general,C1234567890): ' channels
  ;;
  init)
    if [ -n "${SLACK_CLI_TOKEN}" ]; then
      _token="${SLACK_CLI_TOKEN}"
    elif [ -r "${etcdir}/.slack" ] && [ -f "${etcdir}/.slack" ]; then
      _token=$(sed -n '1p' < "${etcdir}/.slack")
    fi

    if [ -z "${token}" ] || [ "${token}" == "${_token}" ]; then
      read -e -p 'Enter Slack API token: ' token
    fi
  ;;
  reminderadd)
    [ -z "${text}" ] && read -e -p 'Enter text (e.g. lunch): ' text
    [ -z "${_time}" ] && read -e -p 'Enter time (e.g. 123456789): ' _time
  ;;
  remindercomplete|reminderdelete|reminderinfo)
    [ -z "${reminder}" ] && read -e -p 'Enter reminder (e.g. RmCT7QGVBF): ' reminder
  ;;
  snoozestart)
    [ -z "${minutes}" ] && read -e -p 'Enter minutes (e.g. 60): ' minutes
  ;;
  statusedit)
    [ -z "${text}" ] && read -e -p 'Enter text (e.g. lunch): ' text
    [ -z "${emoji}" ] && read -e -p 'Enter emoji (e.g. :hamburger:): ' emoji
  ;;
esac

# COMMAND UTILITY FUNCTIONS #######################################################################
function attachify() {
  [ -n "${actions}" ] && local _actions=", \"actions\": [${actions}]"
  [ -n "${author}" ] && local _author=", \"author_name\": \"${author}\""
  [ -n "${authoricon}" ] && local _authoricon=", \"author_icon\": \"${authoricon}\""
  [ -n "${authorlink}" ] && local _authorlink=", \"author_link\": \"${authorlink}\""
  [ -n "${color}" ] && local _color=", \"color\": \"${color}\""
  [ -n "${fields}" ] && local _fields=", \"fields\": [${fields}]"
  [ -n "${footer}" ] && local _footer=", \"footer\": \"${footer}\""
  [ -n "${footericon}" ] && local _footericon=", \"footer_icon\": \"${footericon}\""
  [ -n "${image}" ] && local _image=", \"image_url\": \"${image}\""
  [ -n "${pretext}" ] && local _pretext=", \"pretext\": \"${pretext}\""
  [ -n "${thumbnail}" ] && local _thumbnail=", \"thumb_url\": \"${thumbnail}\""
  [ -n "${_time}" ] && local __time=", \"ts\": \"${_time}\""
  [ -n "${title}" ] && local _title=", \"title\": \"${title}\""
  [ -n "${titlelink}" ] && local _titlelink=", \"title_link\": \"${titlelink}\""
  local _json="${_author}${_authoricon}${_authorlink}${_color}${_footer}${_footericon}${_image}${_pretext}${_thumbnail}${__time}${_title}${_titlelink}${_fields}${_actions}"
  [ -z "${_json}" ] && local _attachments="[{\"mrkdwn_in\": [\"pretext\"], \"fallback\": \"${text}\", \"pretext\": \"${text}\"}]"
  [ -n "${_json}" ] && local _attachments="[{\"mrkdwn_in\": [\"fields\", \"pretext\", \"text\"], \"fallback\": \"${text}\", \"text\": \"${text}\"${_json}}]"

  echo "${_attachments}"
}

function jqify() {
  case "$(echo ${1} | jq -r '.ok')" in
    true) echo ${1} | jq -r ${compact} ${monochrome} "${filter:=.}" ;;
    *) echo ${1} | jq -r ${compact} ${monochrome} "${filter:=.}" ; return 1 ;;
  esac
}

function lchannel() {
  case "${channel}" in
    @*)
      local _user=$(\
        curl -s -X POST https://slack.com/api/users.list --data-urlencode "token=${token}" 2>&1 | \
        jq -r ".members | map(select(.name == \"${channel/@/}\" or .profile.display_name == \"${channel/@/}\")) | .[0].id")
      local _channel=$(\
        curl -s -X POST https://slack.com/api/im.list --data-urlencode "token=${token}" 2>&1 | \
        jq -r ".ims | map(select(.user == \"${_user}\")) | .[].id")

      echo ${_channel}
    ;;
    *) echo ${channel} ;;
  esac
}

function luser() {
  case "${user}" in
    @*)
      local _user=$(\
        curl -s -X POST https://slack.com/api/users.list --data-urlencode "token=${token}" 2>&1 | \
        jq -r ".members | map(select(.name == \"${user/@/}\" or .profile.display_name == \"${user/@/}\")) | .[0].id")

      echo ${_user}
    ;;
    *) echo ${user} ;;
  esac
}

# COMMAND FUNCTIONS ###############################################################################
function chatdelete() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/chat.delete \
      --data-urlencode "as_user=true" \
      --data-urlencode "channel=$(lchannel)" \
      --data-urlencode "ts=${timestamp}" \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function chatsend() {
  [ -n "${stdin}" ] && [ -z "${text}" ] && text=\`\`\`${stdin//$'\n'/'\n'}\`\`\`

  local msg=$(\
    curl -s -X POST https://slack.com/api/chat.postMessage \
      --data-urlencode "as_user=true" \
      --data-urlencode "attachments=$(attachify)" \
      --data-urlencode "channel=$(lchannel)" \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function chatupdate() {
  [ -n "${stdin}" ] && [ -z "${text}" ] && text=\`\`\`${stdin//$'\n'/'\n'}\`\`\`

  local msg=$(\
    curl -s -X POST https://slack.com/api/chat.update \
      --data-urlencode "as_user=true" \
      --data-urlencode "attachments=$(attachify)" \
      --data-urlencode "channel=$(lchannel)" \
      --data-urlencode "ts=${timestamp}" \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function help() {
  local a=(${0//\// })
  local bin=${a[${#a[@]}-1]}

  echo 'Usage:'
  echo "  ${bin} chat delete [<timestamp> [channel]]"
  echo '    [--channel|-ch <channel>] [--compact|-c] [--filter|-f <filter>] [--monochrome|-m]'
  echo '    [--timestamp|-ts <timestamp>] [--trace|-x]'
  echo
  echo "  ${bin} chat send [<text> [channel]]"
  echo '    [--author|-at <author>] [--author-icon|-ai <author-icon-url>]'
  echo '    [--author-link|-al <author-link>] [--channel|-ch <channel>] [--color|-cl <color>]'
  echo '    [--compact|-cp] [--fields|-flds <fields>] [--filter|-f <filter>] [--footer|-ft <footer>]'
  echo '    [--footer-icon|-fi <footer-icon-url>] [--image|-im <image-url>] [--monochrome|-m]'
  echo '    [--pretext|-pt <pretext>] [--text|-tx <text>] [--thumbnail|-th <thumbnail-url>]'
  echo '    [--time|-tm <time>] [--title|-ti <title>] [--title-link|-tl <title-link>]'
  echo '    [--trace|-x]'
  echo
  echo "  ${bin} chat update [<text> [<timestamp> [channel]]]"
  echo '    [--author|-at <author>] [--author-icon|-ai <author-icon-url>]'
  echo '    [--author-link|-al <author-link>] [--channel|-ch <channel>] [--color|-cl <color>]'
  echo '    [--compact|-cp] [--fields|flds <fields>] [--filter|-f <filter>] [--footer|-ft <footer>]'
  echo '    [--footer-icon|-fi <footer-icon-url>] [--image|-im <image-url>] [--monochrome|-m]'
  echo '    [--pretext|-pt <pretext>] [--text|-tx <text>] [--thumbnail|-th <thumbnail-url>]'
  echo '    [--time|-tm <time>] [--timestamp|-ts <timestamp>] [--title|-ti <title>]'
  echo '    [--title-link|-tl <title-link>] [--trace|-x]'
  echo
  echo "  ${bin} init"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--token|-tk <token>]'
  echo '    [--trace|-x]'
  echo
  echo "  ${bin} file delete [file]"
  echo '    [--compact|-c] [--file|-fl <file>] [--filter|-f <filter>] [--monochrome|-m]'
  echo '    [--trace|-x]'
  echo
  echo "  ${bin} file info [file]"
  echo '    [--count|-cn <count>] [--compact|-c] [--file|-fl <file>] [--filter|-f <filter>]'
  echo '    [--monochrome|-m] [--page|-pg <page>] [--trace|-x]'
  echo
  echo "  ${bin} file list"
  echo '    [--channel|-ch <channel>] [--count|-cn <count>] [--compact|-c] [--filter|-f <filter>]'
  echo '    [--monochrome|-m] [--page|-pg <page>] [--timestamp-from|-tf <timetamp>]'
  echo '    [--timestamp-to|-tt <timestamp>] [--trace|-x] [--types|-ty <types>]'
  echo '    [--user|-ur <user>]'
  echo
  echo "  ${bin} file upload [<file> [channels]]"
  echo '    [--channels|-chs <channels>] [--comment|-cm <comment>] [--compact|-c]'
  echo '    [--file|fl <file>] [--filename|-fn <filename>] [--filetype|-ft <filetype>]'
  echo '    [--filter|-f <filter>] [--monochrome|-m] [--title|-ti <title>] [--trace|-x]'
  echo
  echo "  ${bin} presence active"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--trace|-x]'
  echo
  echo "  ${bin} presence away"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--trace|-x]'
  echo
  echo "  ${bin} reminder add [<text> [time]]"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--text|tx <text>]'
  echo '    [--time|tm <time>] [--trace|-x] [--user|-ur <user>]'
  echo
  echo "  ${bin} reminder complete [reminder]"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--reminder|rm <reminder>]'
  echo '    [--trace|-x]'
  echo
  echo "  ${bin} reminder delete [reminder]"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--reminder|rm <reminder>]'
  echo '    [--trace|-x]'
  echo
  echo "  ${bin} reminder info [reminder]"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--reminder|rm <reminder>]'
  echo '    [--trace|-x]'
  echo
  echo "  ${bin} reminder list"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--trace|-x]'
  echo
  echo "  ${bin} snooze end"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--trace|-x]'
  echo
  echo "  ${bin} snooze info [user]"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--trace|-x]'
  echo '    [--user|-ur <user>]'
  echo
  echo "  ${bin} snooze start [minutes]"
  echo '    [--compact|-c] [--filter|-f <filter>] [--minutes|-mn <minutes>] [--monochrome|-m]'
  echo '    [--trace|-x]'
  echo
  echo "  ${bin} status clear"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--trace|-x]'
  echo
  echo "  ${bin} status edit [<text> [<emoji>]]"
  echo '    [--compact|-c] [--filter|-f <filter>] [--monochrome|-m] [--trace|-x]'
  echo
  echo 'Configuration Commands:'
  echo '  init    Initialize'
  echo
  echo 'Chat Commands:'
  echo '  chat delete    Delete chat message'
  echo '  chat send      Send chat message'
  echo '  chat update    Update chat message'
  echo
  echo 'File Commands:'
  echo '  file delete    Delete file'
  echo '  file info      Info about file'
  echo '  file list      List files'
  echo '  file upload    Upload file'
  echo
  echo 'Presence Commands:'
  echo '  presence active    Active presence'
  echo '  presence away      Away presence'
  echo
  echo 'Reminder Commands:'
  echo '  reminder add         Add reminder'
  echo '  reminder complete    Complete reminder'
  echo '  reminder delete      Delete reminder'
  echo '  reminder info        Info about reminder'
  echo '  reminder list        List reminders'
  echo
  echo 'Snooze Commands:'
  echo '  snooze end      End snooze'
  echo '  snooze info     Info about snooze'
  echo '  snooze start    Start snooze'
  echo
  echo 'Status Commands:'
  echo '  status clear    Clear status'
  echo '  status edit     Edit status'
  echo
  echo 'More Information:'
  echo '  repo    https://github.com/rockymadden/slack-cli'
}

function filedelete() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/files.delete \
      --data-urlencode "file=${file}" \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function fileinfo() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/files.info \
      ${count:+ --data-urlencode "count=${count}"} \
      --data-urlencode "file=${file}" \
      ${page:+ --data-urlencode "page=${page}"} \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function filelist() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/files.list \
      ${channel:+ --data-urlencode "channel=${channel}"} \
      ${count:+ --data-urlencode "count=${count}"} \
      ${page:+ --data-urlencode "page=${page}"} \
      ${timestampfrom:+ --data-urlencode "ts_from=${timestampfrom}"} \
      ${timestampto:+ --data-urlencode "ts_to=${timestampto}"} \
      ${types:+ --data-urlencode "types=${types}"} \
      ${user:+ --data-urlencode "user=$(luser)"} \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function fileupload() {
  [ -n "${stdin}" ] && [ -z "${file}" ] && file=${stdin}

  if [ -f "${file}" ]; then
    local _file=${file}

    case "${filename}" in
      '') local _filename=$(basename ${file}) ;;
      *) local _filename=${filename} ;;
    esac
  else
    local _content=${file}

    case "${filename}" in
      '') local _filename='stdin' ;;
      *) local _filename=${filename} ;;
    esac
  fi

  case "${_file}" in
    '')
      local msg=$(\
        curl -s -X POST https://slack.com/api/files.upload \
          ${channels:+ --data-urlencode "channels=${channels}"} \
          ${comment:+ --data-urlencode "initial_comment=${comment}"} \
          ${_content:+ --data-urlencode "content=${_content}"} \
          ${_filename:+ --data-urlencode "filename=${_filename}"} \
          ${filetype:+ --data-urlencode "filetype=${filetype}"} \
          ${title:+ --data-urlencode "title=${title}"} \
          --data-urlencode "token=${token}")
    ;;
    *)
      local msg=$(\
        curl -s -X POST https://slack.com/api/files.upload \
          ${channels:+ --form-string "channels=${channels}"} \
          ${comment:+ --form "initial_comment=${comment}"} \
          ${_file:+ --form "file=@${_file}"} \
          ${_filename:+ --form "filename=${_filename}"} \
          ${filetype:+ --form "filetype=${filetype}"} \
          ${title:+ --form "title=${title}"} \
          --form "token=${token}")
    ;;
  esac

  jqify "${msg}"
}

function init() {
  echo "${token}" > "${etcdir}/.slack"

  case "${?}" in
    0) echo '{"ok": true}' | jq -r ${compact} ${monochrome} "${filter:=.}" ;;
    *)
      echo '{"ok": false, "error": "not_writable"}' |
        jq -r ${compact} ${monochrome} "${filter:=.}" ; return 1
    ;;
  esac
}

# Setting presence=auto + setActive works more consistently than just setActive.
function presenceactive() {
  local msg0=$(\
    curl -s -X POST https://slack.com/api/users.setPresence \
      --data-urlencode "presence=auto" \
      --data-urlencode "token=${token}")

  local msg1=$(\
    curl -s -X POST https://slack.com/api/users.setActive \
      --data-urlencode "token=${token}")

  jqify "${msg0}" && jqify "${msg1}" >/dev/null 2>&1
}

function presenceaway() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/users.setPresence \
      --data-urlencode "presence=away" \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function reminderadd() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/reminders.add \
      --data-urlencode "text=${text}" \
      --data-urlencode "time=${_time}" \
      ${user:+ --data-urlencode "user=$(luser)"} \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function remindercomplete() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/reminders.complete \
      --data-urlencode "reminder=${reminder}" \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function reminderdelete() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/reminders.delete \
      --data-urlencode "reminder=${reminder}" \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function reminderinfo() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/reminders.info \
      --data-urlencode "reminder=${reminder}" \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function reminderlist() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/reminders.list \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function snoozeend() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/dnd.endSnooze \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function snoozeinfo() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/dnd.info \
      ${user:+ --data-urlencode "user=$(luser)"} \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function snoozestart() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/dnd.setSnooze \
      --data-urlencode "num_minutes=${minutes}" \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function statusclear() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/users.profile.set \
      --data-urlencode 'profile={"status_text":"", "status_emoji":""}' \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function statusedit() {
  local msg=$(\
    curl -s -X POST https://slack.com/api/users.profile.set \
      --data-urlencode "profile={\"status_text\":\"${text}\", \"status_emoji\":\"${emoji}\"}" \
      --data-urlencode "token=${token}")

  jqify "${msg}"
}

function version() {
  echo '0.18.0'
}

# COMMAND ROUTING #################################################################################
case "${cmd}${sub}" in
  --help|-h) help ; exit 0 ;;
  --version|-v) version ; exit 0 ;;
  init) init ; exit $? ;;
  chatdelete|chatsend|chatupdate|\
  filedelete|fileinfo|filelist|fileupload|\
  presenceactive|presenceaway|\
  reminderadd|remindercomplete|reminderdelete|reminderinfo|reminderlist|\
  snoozeend|snoozeinfo|snoozestart|\
  statusclear|statusedit)
    if [ -z "${token}" ]; then
      echo '{"ok": false, "error": "not_inited"}' |
        jq -r ${compact} ${monochrome} "${filter:=.}" ; exit 1
    fi

    ${cmd}${sub} ; exit $?
  ;;
  *) help ; exit 1 ;;
esac

Após isso de permissão de execução para seu shell script com o seguinte comando chomd +x slack-cli
Agora você precisa ir ate sua conta no slack e gerar um token, depois disso copie o token e coloque no mesmo diretório dentro de um arquivo chamado .slack

Como utilizar

./slack-cli chat send “Testing message” ‘#slack-channel-name’