install_curl.go

package main

// Curl may not be present on the system, but is required for the
// standard Deno installer script.
var installCurlScript = `#!/bin/sh

# Run some OS detection first, maybe we do more sophisticated
# stuff with this later.

if [ -f /etc/os-release ]; then
  # freedesktop.org and systemd
  . /etc/os-release
  export OS=$NAME
  export VER=$VERSION_ID
elif type lsb_release >/dev/null 2>&1; then
  # linuxbase.org
  export OS=$(lsb_release -si)
  export VER=$(lsb_release -sr)
elif [ -f /etc/lsb-release ]; then
  # For some versions of Debian/Ubuntu without lsb_release command
  . /etc/lsb-release
  export OS=$DISTRIB_ID
  export VER=$DISTRIB_RELEASE
elif [ -f /etc/debian_version ]; then
  # Older Debian/Ubuntu/etc.
  export OS=Debian
  export VER=$(cat /etc/debian_version)
else
  # Fall back to uname, e.g. "Linux <version>", also works for BSD, etc.
  OS=$(uname -s)
  VER=$(uname -r)
fi

echo "OS DETECTED: $OS $VER"
echo ""

# Use our corny method of installing curl: look for
# well-known package managers and call them.

if ! [ -x "$(command -v curl)" ]; then
  echo "curl executable not detected"
  if [ -x "$(command -v apt-get)" ]; then
    echo 'using apt-get'
    apt-get update
    apt-get install -y curl
  elif [ -x "$(command -v yum)" ]; then
    echo "using yum"
    yum update
    yum install -y curl
  elif [ -x "$(command -v apk)" ]; then
    echo "using apk"
    apk add --no-cache curl
  else
    echo "package manager not detected"
    exit 1
  fi
fi

if ! [ -x "$(command -v curl)" ]; then
  echo "curl installed, but not available to our process"
  exit 1
fi

`