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envkernel.sh: Add reactivate, deactivate on re-source (MR 1918) 

Some users prefer to re-source the script from time to time. Detect that
and deactivate first.
This commit is contained in:
Iskren Chernev 2020-04-13 14:19:33 +03:00 committed by Oliver Smith
parent 4e3a2d6923
commit 2dd707a7ea
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GPG Key ID: 5AE7F5513E0885CB
1 changed files with 25 additions and 3 deletions
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28
helpers/envkernel.sh
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@ -38,6 +38,10 @@ clean_kernel_src_dir() {
export_pmbootstrap_dir() {
if [ -n "$pmbootstrap_dir" ]; then
return 0;
fi
# Get pmbootstrap dir based on this script's location
# See also: <https://stackoverflow.com/a/29835459>
# shellcheck disable=SC2039
@ -278,7 +282,9 @@ update_prompt() {
set_deactivate() {
cmd="_deactivate() {"
cmd="$cmd unalias make kernelroot pmbootstrap pmbroot run-script deactivate;"
cmd="$cmd unset POSTMARKETOS_ENVKERNEL_ENABLED;"
cmd="$cmd unalias make kernelroot pmbootstrap pmbroot run-script;"
cmd="$cmd unalias deactivate reactivate;"
cmd="$cmd if [ -n \"\$_OLD_PS1\" ]; then"
cmd="$cmd export PS1=\"\$_OLD_PS1\";"
cmd="$cmd unset _OLD_PS1;"
@ -293,6 +299,18 @@ set_deactivate() {
unset cmd
}
set_reactivate() {
# shellcheck disable=SC2139
alias reactivate="deactivate; pushd '$PWD'; . '$pmbootstrap_dir'/helpers/envkernel.sh; popd"
}
check_and_deactivate() {
if [ "$POSTMARKETOS_ENVKERNEL_ENABLED" -eq 1 ]; then
# we already are runnning in envkernel
deactivate
fi
}
print_usage() {
# shellcheck disable=SC2039
@ -347,7 +365,8 @@ parse_args() {
main() {
# Stop executing once a function fails
# shellcheck disable=SC1090
if check_kernel_folder \
if check_and_deactivate \
&& check_kernel_folder \
&& clean_kernel_src_dir \
&& export_pmbootstrap_dir "$1" \
&& set_alias_pmbootstrap \
@ -360,7 +379,10 @@ main() {
&& set_alias_make \
&& set_alias_pmbroot_kernelroot \
&& update_prompt \
&& set_deactivate; then
&& set_deactivate \
&& set_reactivate; then
POSTMARKETOS_ENVKERNEL_ENABLED=1
# Success
echo "pmbootstrap envkernel.sh activated successfully."