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ghcup
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Improve error handling 

In most cases, when we run a subshell with our own function
and assign the result to a variable, we also need to check that
the variable is non-empty, since 'die' and 'edo' don't propagate
to the parent shell.

In some cases, non-emptiness is handled in other ways or is not
fatal.
This commit is contained in:
Julian Ospald 2019-01-04 16:06:06 +08:00
parent d1cb7127af
commit 820d8eaa69
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GPG Key ID: 511B62C09D50CD28
1 changed files with 11 additions and 3 deletions
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ghcup
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@ -743,9 +743,11 @@ get_download_url() {
mytool=$1
myver=$2
myarch=$(get_arch)
[ -z "${myarch}" ] && die "failed to get architecture"
mydistro=$(get_distro_alias "$(get_distro_name)")
mydistrover=$(get_distro_ver)
meta_file="$(get_meta_download_file)"
[ -z "${meta_file}" ] && die "failed to get meta file"
# 1st try with full distro=ver
@ -785,6 +787,7 @@ get_tool_ver_from_tag() {
mytag=$2
meta_file="$(get_meta_version_file)"
[ -z "${meta_file}" ] && die "failed to get meta file"
awk "
NF {
@ -1170,13 +1173,14 @@ install_ghc() {
myghcver=$1
inst_location=$(get_ghc_location "$1")
[ -z "${inst_location}" ] && die "failed to get install location"
download_url=$(get_download_url "ghc" "${myghcver}")
download_tarball_name=$(basename "${download_url}")
first_install=true
if [ -z "${download_url}" ] ; then
die "Could not find an appropriate download for the requested GHC-${myghcver} on your system! Please report a bug at ${BUG_URL}"
fi
download_tarball_name=$(basename "${download_url}")
first_install=true
status_message "Installing GHC-${myghcver} for $(get_distro_name) on architecture $(get_arch)"
@ -1261,6 +1265,7 @@ set_ghc() {
myghcver=$1
inst_location=$(get_ghc_location "$1")
[ -z "${inst_location}" ] && die "failed to get install location"
[ -e "${inst_location}" ] || die "GHC ${myghcver} not installed yet, use: ${SCRIPT} install ${myghcver}"
@ -1450,6 +1455,7 @@ install_cabal() {
mycabalver=$1
myarch=$(get_arch)
[ -z "${myarch}" ] && die "failed to get architecture"
inst_location=$BIN_LOCATION
download_url=$(get_download_url "cabal-install" "${mycabalver}")
download_tarball_name=$(basename "${download_url}")
@ -1509,6 +1515,7 @@ compile_ghc() {
myghcver=$1
bootstrap_ghc=$2
inst_location=$(get_ghc_location "$1")
[ -z "${inst_location}" ] && die "failed to get install location"
download_url="https://downloads.haskell.org/~ghc/${myghcver}/ghc-${myghcver}-src.tar.xz"
download_tarball_name=$(basename "${download_url}")
@ -1903,4 +1910,5 @@ if ! is_sourced ; then
done
fi # is_sourced
# vim: tabstop=4 shiftwidth=4 expandtab