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Finalize rbenv shell - implementation

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This ensures that OLD_RBENV_VERSION is never exported. This makes the
implementation a little bit more complex, since more logic needs to be
pushed down into eval'd code.
This commit is contained in:
Mislav Marohnić
2016-11-25 20:24:16 +01:00
parent 6a912bf104
commit c4d97ad392
2 changed files with 68 additions and 62 deletions
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61
libexec/rbenv-sh-shell
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@@ -3,6 +3,7 @@
# Summary: Set or show the shell-specific Ruby version
#
# Usage: rbenv shell <version>
# rbenv shell -
# rbenv shell --unset
#
# Sets a shell-specific Ruby version by setting the `RBENV_VERSION'
@@ -12,6 +13,11 @@
# <version> should be a string matching a Ruby version known to rbenv.
# The special version string `system' will use your default system Ruby.
# Run `rbenv versions' for a list of available Ruby versions.
#
# When `-` is passed instead of the version string, the previously set
# version will be restored. With `--unset`, the `RBENV_VERSION`
# environment variable gets unset, restoring the environment to the
# state before the first `rbenv shell` call.
set -e
[ -n "$RBENV_DEBUG" ] && set -x
@@ -31,7 +37,7 @@ if [ -z "$version" ]; then
echo "rbenv: no shell-specific version configured" >&2
exit 1
else
echo "echo \"\$RBENV_VERSION\""
echo 'echo "$RBENV_VERSION"'
exit
fi
fi
@@ -39,11 +45,11 @@ fi
if [ "$version" = "--unset" ]; then
case "$shell" in
fish )
echo "set -e OLD_RBENV_VERSION"
echo 'set -gu OLD_RBENV_VERSION "$RBENV_VERSION"'
echo "set -e RBENV_VERSION"
;;
* )
echo "unset OLD_RBENV_VERSION"
echo 'OLD_RBENV_VERSION="$RBENV_VERSION"'
echo "unset RBENV_VERSION"
;;
esac
@@ -51,20 +57,42 @@ if [ "$version" = "--unset" ]; then
fi
if [ "$version" = "-" ]; then
if [ -z "$OLD_RBENV_VERSION" ]; then
echo "rbenv: OLD_RBENV_VERSION not set" >&2
exit 1;
fi
case "$shell" in
fish )
rbenv_version=$RBENV_VERSION
echo "set -e OLD_RBENV_VERSION \"$rbenv_version\""
echo "set -e RBENV_VERSION \"$OLD_RBENV_VERSION\""
cat <<EOS
if set -q OLD_RBENV_VERSION
if [ -n "\$OLD_RBENV_VERSION" ]
set OLD_RBENV_VERSION_ "\$RBENV_VERSION"
set -gx RBENV_VERSION "\$OLD_RBENV_VERSION"
set -gu OLD_RBENV_VERSION "\$OLD_RBENV_VERSION_"
set -e OLD_RBENV_VERSION_
else
set -gu OLD_RBENV_VERSION "\$RBENV_VERSION"
set -e RBENV_VERSION
end
else
echo "rbenv: OLD_RBENV_VERSION is not set" >&2
false
end
EOS
;;
* )
rbenv_version=$RBENV_VERSION
echo "export OLD_RBENV_VERSION=\"$rbenv_version\""
echo "export RBENV_VERSION=\"$OLD_RBENV_VERSION\""
cat <<EOS
if [ -n "\${OLD_RBENV_VERSION+x}" ]; then
if [ -n "\$OLD_RBENV_VERSION" ]; then
OLD_RBENV_VERSION_="\$RBENV_VERSION"
export RBENV_VERSION="\$OLD_RBENV_VERSION"
OLD_RBENV_VERSION="\$OLD_RBENV_VERSION_"
unset OLD_RBENV_VERSION_
else
OLD_RBENV_VERSION="\$RBENV_VERSION"
unset RBENV_VERSION
fi
else
echo "rbenv: OLD_RBENV_VERSION is not set" >&2
false
fi
EOS
;;
esac
exit
@@ -75,11 +103,12 @@ if rbenv-prefix "$version" >/dev/null; then
if [ "$version" != "$RBENV_VERSION" ]; then
case "$shell" in
fish )
echo "setenv RBENV_VERSION \"${version}\""
echo 'set -gu OLD_RBENV_VERSION "$RBENV_VERSION"'
echo "set -gx RBENV_VERSION \"$version\""
;;
* )
echo "export OLD_RBENV_VERSION=\"$RBENV_VERSION\""
echo "export RBENV_VERSION=\"${version}\""
echo 'OLD_RBENV_VERSION="$RBENV_VERSION"'
echo "export RBENV_VERSION=\"$version\""
;;
esac
fi