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Adding a function to handle creation of temp dir. Polished the checksum check function to handle more cases/OSes

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Micheal Quinn 2019-08-11 12:31:19 -05:00
parent 9530952eb6
commit b0ac5024a4
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GPG key ID: 0E7217F3C30BA059
1 changed files with 72 additions and 9 deletions
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79
src/install/rewrite.txt
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@ -19,6 +19,31 @@
#===============================================================================
set -o nounset # Treat unset variables as an error
#--- FUNCTION ----------------------------------------------------------------
# NAME: make_tempdir
# DESCRIPTION: Makes a temp dir using mktemp if available
# PARAMETERS: $1 = Directory template
# RETURNS: 0 = Created temp dir. Also prints temp file path to stdout
# 1 = Failed to create temp dir
#-------------------------------------------------------------------------------
make_tempdir() {
local template
local tempdir
template="${1}"
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
fi
}
#--- FUNCTION ----------------------------------------------------------------
# NAME: determine_os
# DESCRIPTION: Attempts to determin host os using uname
@ -112,26 +137,53 @@ download_file() {
#--- FUNCTION ----------------------------------------------------------------
# NAME: checksum_check
# DESCRIPTION: Attempt to verify checksum of downloaded file to ensure
# integrity.
# integrity. Tries multiple tools before faling.
# PARAMETERS: $1 = path to checksum file
# $2 = location of file to check
# $3 = working directory
# RETURNS: 0 = checkusm verified
# 1 = checksum verification failed
# 2 = failed to determine tool to use to check checksum
# 3 = failed to change into or go back from working dir
# 20 = failed to determine tool to use to check checksum
# 30 = failed to change into or go back from working dir
#-------------------------------------------------------------------------------
checksum_check() {
local checksum_file
local file
local shasum_1
local shasum_2
checksum_file="${1}"
file="${2}"
dir="${3}"
cd "${dir}" || return 3
if command -v sha256sum >/dev/null 2>&1; then
sha256sum -c "${checksum_file}" --ignore-missing >/dev/null 2>&1
cd - >/dev/null 2>&1 || return 3
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 -s -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}" == "${shasum_2}" ]]; then
rcode="0"
else
rcode="1"
fi
else
return 20
fi
cd - >/dev/null 2>&1 || return 30
return "${rcode}"
}
#--- FUNCTION ----------------------------------------------------------------
@ -245,7 +297,15 @@ main() {
croc_dl_ext="tar.gz"
croc_base_url="https://github.com/schollz/croc/releases/download"
prefix="/usr/local/bin"
tmpdir="$(mktemp -d --suffix="_${croc_bin_name}")"
tmpdir="$(make_tempdir "${croc_bin_name}")"
tmpdir_rcode="${?}"
if [[ "${tmpdir_rcode}" == "0" ]]; then
echo "== Created temp dir at ${tmpdir}"
else
echo "== Failed to create temp dir at ${tmpdir}"
exit 1
fi
croc_arch="$(determine_arch)"
croc_arch_rcode="${?}"
@ -277,7 +337,6 @@ main() {
* ) croc_arch="unknown";;
esac
croc_file="${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}"
@ -295,6 +354,7 @@ main() {
exit 1
else
echo "== Return code of download tool returned an unexpected value of ${download_file_rcode}"
exit 1
fi
download_file "${croc_checksum_url}" "${tmpdir}" "${croc_checksum_file}"
download_checksum_file_rcode="${?}"
@ -308,6 +368,7 @@ main() {
exit 1
else
echo "== Return code of download tool returned an unexpected value of ${download_checksum_file_rcode}"
exit 1
fi
checksum_check "${tmpdir}/${croc_checksum_file}" "${tmpdir}/${croc_file}" "${tmpdir}"
@ -317,15 +378,17 @@ main() {
elif [[ "${checksum_check_rcode}" == "1" ]]; then
echo "== Failed to verify checksum of ${tmpdir}/${croc_file}"
exit 1
elif [[ "${checksum_check_rcode}" == "2" ]]; then
elif [[ "${checksum_check_rcode}" == "20" ]]; then
echo "== Failed to find tool to verify sha256 sums"
exit 1
elif [[ "${checksum_check_rcode}" == "30" ]]; then
echo "== Failed to change into working directory ${tmpdir}"
exit 1
else
echo "== Unknown return code returned while checking checksum of ${tmpdir}/${croc_file}. Returned ${checksum_check_rcode}"
exit 1
fi
extract_file "${tmpdir}/${croc_file}" "${tmpdir}/" "${croc_dl_ext}"
extract_file_rcode="${?}"
if [[ "${extract_file_rcode}" == "0" ]]; then