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#!/bin/bash -
#===============================================================================
#
# FILE: default.txt
#
# USAGE: curl https://getcroc.schollz.com | bash
# OR
# wget -qO- https://getcroc.schollz.com | bash
#
# DESCRIPTION: croc Installer Script.
#
# This script installs croc into a specified prefix.
# Default prefix = /usr/local/bin
#
# OPTIONS: -p, --prefix "${INSTALL_PREFIX}"
# Prefix to install croc into. Defaults to /usr/local/bin
# REQUIREMENTS: bash, uname, tar/unzip, curl/wget, sudo (if not run
# as root), install, mktemp, sha256sum/shasum/sha256
#
# BUGS: ...hopefully not. Please report.
#
# NOTES: Homepage: https://schollz.com/software/croc
# Issues: https://github.com/schollz/croc/issues
#
# CREATED: 08/10/2019 16:41
# REVISION: 0.9.2
#===============================================================================
set -o nounset # Treat unset variables as an error
#-------------------------------------------------------------------------------
# DEFAULTS
#-------------------------------------------------------------------------------
PREFIX="${PREFIX:-}"
ANDROID_ROOT="${ANDROID_ROOT:-}"
# Termux on Android has ${PREFIX} set which already ends with '/usr'
if [[ -n "${ANDROID_ROOT}" && -n "${PREFIX}" ]]; then
INSTALL_PREFIX="${PREFIX}/bin"
else
INSTALL_PREFIX="/usr/local/bin"
fi
#-------------------------------------------------------------------------------
# FUNCTIONS
#-------------------------------------------------------------------------------
#--- FUNCTION ----------------------------------------------------------------
# NAME: print_banner
# DESCRIPTION: Prints a banner
# PARAMETERS: none
# RETURNS: 0
#-------------------------------------------------------------------------------
print_banner() {
cat <<-'EOF'
=================================================
____
/ ___|_ __ ___ ___
| | | '__/ _ \ / __|
| |___| | | (_) | (__
\____|_| \___/ \___|
___ _ _ _
|_ _|_ __ ___| |_ __ _| | | ___ _ __
| || '_ \/ __| __/ _` | | |/ _ \ '__|
| || | | \__ \ || (_| | | | __/ |
|___|_| |_|___/\__\__,_|_|_|\___|_|
==================================================
EOF
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: print_help
# DESCRIPTION: Prints out a help message
# PARAMETERS: none
# RETURNS: 0
#-------------------------------------------------------------------------------
print_help() {
local help_header
local help_message
help_header="croc Installer Script"
help_message="Usage:
-p INSTALL_PREFIX
Prefix to install croc into. Directory must already exist.
Default = /usr/local/bin ('\${PREFIX}/bin' on Termux for Android)
-h
Prints this helpful message and exit."
echo "${help_header}"
echo ""
echo "${help_message}"
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: print_message
# DESCRIPTION: Prints a message all fancy like
# PARAMETERS: $1 = Message to print
# $2 = Severity. info, ok, error, warn
# RETURNS: Formatted Message to stdout
#-------------------------------------------------------------------------------
print_message() {
local message
local severity
local red
local green
local yellow
local nc
message="${1}"
severity="${2}"
red='\e[0;31m'
green='\e[0;32m'
yellow='\e[1;33m'
nc='\e[0m'
case "${severity}" in
"info" ) echo -e "${nc}${message}${nc}";;
"ok" ) echo -e "${green}${message}${nc}";;
"error" ) echo -e "${red}${message}${nc}";;
"warn" ) echo -e "${yellow}${message}${nc}";;
esac
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: make_tempdir
# DESCRIPTION: Makes a temp dir using mktemp if available
# PARAMETERS: $1 = Directory template
# RETURNS: 0 = Created temp dir. Also prints temp file path to stdout
# 1 = Failed to create temp dir
# 20 = Failed to find mktemp
#-------------------------------------------------------------------------------
make_tempdir() {
local template
local tempdir
local tempdir_rcode
template="${1}.XXXXXX"
if command -v mktemp >/dev/null 2>&1; then
tempdir="$(mktemp -d -t "${template}")"
tempdir_rcode="${?}"
if [[ "${tempdir_rcode}" == "0" ]]; then
echo "${tempdir}"
return 0
else
return 1
fi
else
return 20
fi
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: determine_os
# DESCRIPTION: Attempts to determine host os using uname
# PARAMETERS: none
# RETURNS: 0 = OS Detected. Also prints detected os to stdout
# 1 = Unknown OS
# 20 = 'uname' not found in path
#-------------------------------------------------------------------------------
determine_os() {
local uname_out
if command -v uname >/dev/null 2>&1; then
uname_out="$(uname)"
if [[ "${uname_out}" == "" ]]; then
return 1
else
echo "${uname_out}"
return 0
fi
else
return 20
fi
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: determine_arch
# DESCRIPTION: Attempt to determine architecture of host
# PARAMETERS: none
# RETURNS: 0 = Arch Detected. Also prints detected arch to stdout
# 1 = Unknown arch
# 20 = 'uname' not found in path
#-------------------------------------------------------------------------------
determine_arch() {
local uname_out
if command -v uname >/dev/null 2>&1; then
uname_out="$(uname -m)"
if [[ "${uname_out}" == "" ]]; then
return 1
else
echo "${uname_out}"
return 0
fi
else
return 20
fi
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: download_file
# DESCRIPTION: Downloads a file into the specified directory. Attempts to
# use curl, then wget. If neither is found, fail.
# PARAMETERS: $1 = url of file to download
# $2 = location to download file into on host system
# RETURNS: If curl or wget found, returns the return code of curl or wget
# 20 = Could not find curl and wget
#-------------------------------------------------------------------------------
download_file() {
local url
local dir
local filename
local rcode
url="${1}"
dir="${2}"
filename="${3}"
if command -v curl >/dev/null 2>&1; then
curl -fsSL "${url}" -o "${dir}/${filename}"
rcode="${?}"
elif command -v wget >/dev/null 2>&1; then
wget --quiet "${url}" -O "${dir}/${filename}"
rcode="${?}"
else
rcode="20"
fi
return "${rcode}"
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: checksum_check
# DESCRIPTION: Attempt to verify checksum of downloaded file to ensure
# integrity. Tries multiple tools before failing.
# PARAMETERS: $1 = path to checksum file
# $2 = location of file to check
# $3 = working directory
# RETURNS: 0 = checkusm verified
# 1 = checksum verification failed
# 20 = failed to determine tool to use to check checksum
# 30 = failed to change into or go back from working dir
#-------------------------------------------------------------------------------
checksum_check() {
local checksum_file
local file
local dir
local rcode
local shasum_1
local shasum_2
local shasum_c
checksum_file="${1}"
file="${2}"
dir="${3}"
cd "${dir}" || return 30
if command -v sha256sum >/dev/null 2>&1; then
## Not all sha256sum versions seem to have --ignore-missing, so filter the checksum file
## to only include the file we downloaded.
grep "$(basename "${file}")" "${checksum_file}" > filtered_checksum.txt
shasum_c="$(sha256sum -c "filtered_checksum.txt")"
rcode="${?}"
elif command -v shasum >/dev/null 2>&1; then
## With shasum on FreeBSD, we don't get to --ignore-missing, so filter the checksum file
## to only include the file we downloaded.
grep "$(basename "${file}")" "${checksum_file}" > filtered_checksum.txt
shasum_c="$(shasum -a 256 -c "filtered_checksum.txt")"
rcode="${?}"
elif command -v sha256 >/dev/null 2>&1; then
## With sha256 on FreeBSD, we don't get to --ignore-missing, so filter the checksum file
## to only include the file we downloaded.
## Also sha256 -c option seems to fail, so fall back to an if statement
grep "$(basename "${file}")" "${checksum_file}" > filtered_checksum.txt
shasum_1="$(sha256 -q "${file}")"
shasum_2="$(awk '{print $1}' filtered_checksum.txt)"
if [[ "${shasum_1}" == "${shasum_2}" ]]; then
rcode="0"
else
rcode="1"
fi
shasum_c="Expected: ${shasum_1}, Got: ${shasum_2}"
else
return 20
fi
cd - >/dev/null 2>&1 || return 30
if [[ "${rcode}" -gt "0" ]]; then
echo "${shasum_c}"
fi
return "${rcode}"
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: extract_file
# DESCRIPTION: Extracts a file into a location. Attempts to determine which
# tool to use by checking file extension.
# PARAMETERS: $1 = file to extract
# $2 = location to extract file into
# $3 = extension
# RETURNS: Return code of the tool used to extract the file
# 20 = Failed to determine which tool to use
# 30 = Failed to find tool in path
#-------------------------------------------------------------------------------
extract_file() {
local file
local dir
local ext
local rcode
file="${1}"
dir="${2}"
ext="${3}"
case "${ext}" in
"zip" ) if command -v unzip >/dev/null 2>&1; then
unzip "${file}" -d "${dir}"
rcode="${?}"
else
rcode="30"
fi
;;
"tar.gz" ) if command -v tar >/dev/null 2>&1; then
tar -xf "${file}" -C "${dir}"
rcode="${?}"
else
rcode="31"
fi
;;
* ) rcode="20";;
esac
return "${rcode}"
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: create_prefix
# DESCRIPTION: Creates the install prefix (and any parent directories). If
# EUID not 0, then attempt to use sudo.
# PARAMETERS: $1 = prefix
# RETURNS: Return code of the tool used to make the directory
# 0 = Created the directory
# >0 = Failed to create directory
# 20 = Could not find mkdir command
# 21 = Could not find sudo command
#-------------------------------------------------------------------------------
create_prefix() {
local prefix
local rcode
prefix="${1}"
if command -v mkdir >/dev/null 2>&1; then
if [[ "${EUID}" == "0" ]]; then
mkdir -p "${prefix}"
rcode="${?}"
else
if command -v sudo >/dev/null 2>&1; then
sudo mkdir -p "${prefix}"
rcode="${?}"
else
rcode="21"
fi
fi
else
rcode="20"
fi
return "${rcode}"
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: install_file_freebsd
# DESCRIPTION: Installs a file into a location using 'install'. If EUID not
# 0, then attempt to use sudo.
# PARAMETERS: $1 = file to install
# $2 = location to install file into
# RETURNS: 0 = File Installed
# 1 = File not installed
# 20 = Could not find install command
# 21 = Could not find sudo command
#-------------------------------------------------------------------------------
install_file_freebsd() {
local file
local prefix
local rcode
file="${1}"
prefix="${2}"
if command -v install >/dev/null 2>&1; then
if [[ "${EUID}" == "0" ]]; then
install -C -b -B '_old' -m 755 "${file}" "${prefix}"
rcode="${?}"
else
if command -v sudo >/dev/null 2>&1; then
sudo install -C -b -B '_old' -m 755 "${file}" "${prefix}"
rcode="${?}"
else
rcode="21"
fi
fi
else
rcode="20"
fi
return "${rcode}"
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: install_file_linux
# DESCRIPTION: Installs a file into a location using 'install'. If EUID not
# 0, then attempt to use sudo (unless on android).
# PARAMETERS: $1 = file to install
# $2 = location to install file into
# RETURNS: 0 = File Installed
# 1 = File not installed
# 20 = Could not find install command
# 21 = Could not find sudo command
#-------------------------------------------------------------------------------
install_file_linux() {
local file
local prefix
local rcode
file="${1}"
prefix="${2}"
if command -v install >/dev/null 2>&1; then
if [[ "${EUID}" == "0" ]]; then
install -C -b -S '_old' -m 755 -t "${prefix}" "${file}"
rcode="${?}"
else
if command -v sudo >/dev/null 2>&1; then
sudo install -C -b -S '_old' -m 755 "${file}" "${prefix}"
rcode="${?}"
elif [[ "${ANDROID_ROOT}" != "" ]]; then
install -C -b -S '_old' -m 755 -t "${prefix}" "${file}"
rcode="${?}"
else
rcode="21"
fi
fi
else
rcode="20"
fi
return "${rcode}"
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: install_file_cygwin
# DESCRIPTION: Installs a file into a location using 'install'. If EUID not
# 0, then attempt to use sudo.
# Not really 100% sure this is how to install croc in cygwin.
# PARAMETERS: $1 = file to install
# $2 = location to install file into
# RETURNS: 0 = File Installed
# 20 = Could not find install command
# 21 = Could not find sudo command
#-------------------------------------------------------------------------------
install_file_cygwin() {
local file
local prefix
local rcode
file="${1}"
prefix="${2}"
if command -v install >/dev/null 2>&1; then
if [[ "${EUID}" == "0" ]]; then
install -m 755 "${prefix}" "${file}"
rcode="${?}"
else
if command -v sudo >/dev/null 2>&1; then
sudo install -m 755 "${file}" "${prefix}"
rcode="${?}"
else
rcode="21"
fi
fi
else
rcode="20"
fi
return "${rcode}"
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: main
# DESCRIPTION: Put it all together in a logical way
# ...at least that is the hope...
# PARAMETERS: 1 = prefix
# RETURNS: 0 = All good
# 1 = Something done broke
#-------------------------------------------------------------------------------
main() {
local prefix
local tmpdir
local tmpdir_rcode
local croc_arch
local croc_arch_rcode
local croc_os
local croc_os_rcode
local croc_base_url
local croc_url
local croc_file
local croc_checksum_file
local croc_bin_name
local croc_version
local croc_dl_ext
local download_file_rcode
local download_checksum_file_rcode
local checksum_check_rcode
local extract_file_rcode
local install_file_rcode
local create_prefix_rcode
local bash_autocomplete_file
local bash_autocomplete_prefix
local zsh_autocomplete_file
local zsh_autocomplete_prefix
local autocomplete_install_rcode
croc_bin_name="croc"
croc_version="9.6.6"
croc_dl_ext="tar.gz"
croc_base_url="https://github.com/schollz/croc/releases/download"
prefix="${1}"
bash_autocomplete_file="bash_autocomplete"
bash_autocomplete_prefix="/etc/bash_completion.d"
zsh_autocomplete_file="zsh_autocomplete"
zsh_autocomplete_prefix="/etc/zsh"
print_banner
print_message "== Install prefix set to ${prefix}" "info"
tmpdir="$(make_tempdir "${croc_bin_name}")"
tmpdir_rcode="${?}"
if [[ "${tmpdir_rcode}" == "0" ]]; then
print_message "== Created temp dir at ${tmpdir}" "info"
elif [[ "${tmpdir_rcode}" == "1" ]]; then
print_message "== Failed to create temp dir at ${tmpdir}" "error"
else
print_message "== 'mktemp' not found in path. Is it installed?" "error"
exit 1
fi
croc_arch="$(determine_arch)"
croc_arch_rcode="${?}"
if [[ "${croc_arch_rcode}" == "0" ]]; then
print_message "== Architecture detected as ${croc_arch}" "info"
elif [[ "${croc_arch_rcode}" == "1" ]]; then
print_message "== Architecture not detected" "error"
exit 1
else
print_message "== 'uname' not found in path. Is it installed?" "error"
exit 1
fi
croc_os="$(determine_os)"
croc_os_rcode="${?}"
if [[ "${croc_os_rcode}" == "0" ]]; then
print_message "== OS detected as ${croc_os}" "info"
elif [[ "${croc_os_rcode}" == "1" ]]; then
print_message "== OS not detected" "error"
exit 1
else
print_message "== 'uname' not found in path. Is it installed?" "error"
exit 1
fi
case "${croc_os}" in
"Darwin" ) croc_os="macOS";;
"CYGWIN"* ) croc_os="Windows";
croc_dl_ext="zip";
print_message "== Cygwin is currently unsupported." "error";
exit 1;;
esac
case "${croc_arch}" in
"x86_64" ) croc_arch="64bit";;
"amd64" ) croc_arch="64bit";;
"aarch64" ) croc_arch="ARM64";;
"arm64" ) croc_arch="ARM64";;
"armv7l" ) croc_arch="ARM";;
"i686" ) croc_arch="32bit";;
* ) croc_arch="unknown";;
esac
croc_file="${croc_bin_name}_${croc_version}_${croc_os}-${croc_arch}.${croc_dl_ext}"
croc_checksum_file="${croc_bin_name}_${croc_version}_checksums.txt"
croc_url="${croc_base_url}/v${croc_version}/${croc_file}"
croc_checksum_url="${croc_base_url}/v${croc_version}/${croc_checksum_file}"
download_file "${croc_url}" "${tmpdir}" "${croc_file}"
download_file_rcode="${?}"
if [[ "${download_file_rcode}" == "0" ]]; then
print_message "== Downloaded croc archive into ${tmpdir}" "info"
elif [[ "${download_file_rcode}" == "1" ]]; then
print_message "== Failed to download croc archive" "error"
exit 1
elif [[ "${download_file_rcode}" == "20" ]]; then
print_message "== Failed to locate curl or wget" "error"
exit 1
else
print_message "== Return code of download tool returned an unexpected value of ${download_file_rcode}" "error"
exit 1
fi
download_file "${croc_checksum_url}" "${tmpdir}" "${croc_checksum_file}"
download_checksum_file_rcode="${?}"
if [[ "${download_checksum_file_rcode}" == "0" ]]; then
print_message "== Downloaded croc checksums file into ${tmpdir}" "info"
elif [[ "${download_checksum_file_rcode}" == "1" ]]; then
print_message "== Failed to download croc checksums" "error"
exit 1
elif [[ "${download_checksum_file_rcode}" == "20" ]]; then
print_message "== Failed to locate curl or wget" "error"
exit 1
else
print_message "== Return code of download tool returned an unexpected value of ${download_checksum_file_rcode}" "error"
exit 1
fi
checksum_check "${tmpdir}/${croc_checksum_file}" "${tmpdir}/${croc_file}" "${tmpdir}"
checksum_check_rcode="${?}"
if [[ "${checksum_check_rcode}" == "0" ]]; then
print_message "== Checksum of ${tmpdir}/${croc_file} verified" "ok"
elif [[ "${checksum_check_rcode}" == "1" ]]; then
print_message "== Failed to verify checksum of ${tmpdir}/${croc_file}" "error"
exit 1
elif [[ "${checksum_check_rcode}" == "20" ]]; then
print_message "== Failed to find tool to verify sha256 sums" "error"
exit 1
elif [[ "${checksum_check_rcode}" == "30" ]]; then
print_message "== Failed to change into working directory ${tmpdir}" "error"
exit 1
else
print_message "== Unknown return code returned while checking checksum of ${tmpdir}/${croc_file}. Returned ${checksum_check_rcode}" "error"
exit 1
fi
extract_file "${tmpdir}/${croc_file}" "${tmpdir}/" "${croc_dl_ext}"
extract_file_rcode="${?}"
if [[ "${extract_file_rcode}" == "0" ]]; then
print_message "== Extracted ${croc_file} to ${tmpdir}/" "info"
elif [[ "${extract_file_rcode}" == "1" ]]; then
print_message "== Failed to extract ${croc_file}" "error"
exit 1
elif [[ "${extract_file_rcode}" == "20" ]]; then
print_message "== Failed to determine which extraction tool to use" "error"
exit 1
elif [[ "${extract_file_rcode}" == "30" ]]; then
print_message "== Failed to find 'unzip' in path" "error"
exit 1
elif [[ "${extract_file_rcode}" == "31" ]]; then
print_message "== Failed to find 'tar' in path" "error"
exit 1
else
print_message "== Unknown error returned from extraction attempt" "error"
exit 1
fi
if [[ ! -d "${prefix}" ]]; then
create_prefix "${prefix}"
create_prefix_rcode="${?}"
if [[ "${create_prefix_rcode}" == "0" ]]; then
print_message "== Created install prefix at ${prefix}" "info"
elif [[ "${create_prefix_rcode}" == "20" ]]; then
print_message "== Failed to find mkdir in path" "error"
exit 1
elif [[ "${create_prefix_rcode}" == "21" ]]; then
print_message "== Failed to find sudo in path" "error"
exit 1
else
print_message "== Failed to create the install prefix: ${prefix}" "error"
exit 1
fi
else
print_message "== Install prefix already exists. No need to create it." "info"
fi
[ ! -d "/etc/bash_completion.d/croc" ] && mkdir -p "/etc/bash_completion.d/croc"
case "${croc_os}" in
"Linux" ) install_file_linux "${tmpdir}/${croc_bin_name}" "${prefix}/";
install_file_rcode="${?}";;
"FreeBSD" ) install_file_freebsd "${tmpdir}/${croc_bin_name}" "${prefix}/";
install_file_rcode="${?}";;
"macOS" ) install_file_freebsd "${tmpdir}/${croc_bin_name}" "${prefix}/";
install_file_rcode="${?}";;
"Windows" ) install_file_cygwin "${tmpdir}/${croc_bin_name}" "${prefix}/";
install_file_rcode="${?}";;
esac
if [[ "${install_file_rcode}" == "0" ]] ; then
print_message "== Installed ${croc_bin_name} to ${prefix}/" "ok"
elif [[ "${install_file_rcode}" == "1" ]]; then
print_message "== Failed to install ${croc_bin_name}" "error"
exit 1
elif [[ "${install_file_rcode}" == "20" ]]; then
print_message "== Failed to locate 'install' command" "error"
exit 1
elif [[ "${install_file_rcode}" == "21" ]]; then
print_message "== Failed to locate 'sudo' command" "error"
exit 1
else
print_message "== Install attempt returned an unexpected value of ${install_file_rcode}" "error"
exit 1
fi
case "$(basename ${SHELL})" in
"bash" ) install_file_linux "${tmpdir}/${bash_autocomplete_file}" "${bash_autocomplete_prefix}/croc";
autocomplete_install_rcode="${?}";;
"zsh" ) install_file_linux "${tmpdir}/${zsh_autocomplete_file}" "${zsh_autocomplete_prefix}/zsh_autocomplete_croc";
autocomplete_install_rcode="${?}";
print_message "== You will need to add the following to your ~/.zshrc to enable autocompletion" "info";
print_message "\nPROG=croc\n_CLI_ZSH_AUTOCOMPLETE_HACK=1\nsource /etc/zsh/zsh_autocomplete_croc\n" "info";;
*) autocomplete_install_rcode="1";;
esac
if [[ "${autocomplete_install_rcode}" == "0" ]] ; then
print_message "== Installed autocompletions for $(basename "${SHELL}")" "ok"
elif [[ "${autocomplete_install_rcode}" == "1" ]]; then
print_message "== Failed to install ${bash_autocomplete_file}" "error"
elif [[ "${autocomplete_install_rcode}" == "20" ]]; then
print_message "== Failed to locate 'install' command" "error"
elif [[ "${autocomplete_install_rcode}" == "21" ]]; then
print_message "== Failed to locate 'sudo' command" "error"
else
print_message "== Install attempt returned an unexpected value of ${autocomplete_install_rcode}" "error"
fi
print_message "== Installation complete" "ok"
exit 0
}
#-------------------------------------------------------------------------------
# ARGUMENT PARSING
#-------------------------------------------------------------------------------
OPTS="hp:"
while getopts "${OPTS}" optchar; do
case "${optchar}" in
'h' ) print_help
exit 0
;;
'p' ) INSTALL_PREFIX="${OPTARG}"
;;
/? ) print_message "Unknown option ${OPTARG}" "warn"
;;
esac
done
#-------------------------------------------------------------------------------
# CALL MAIN
#-------------------------------------------------------------------------------
main "${INSTALL_PREFIX}"