pyenv/libexec/rbenv-which
Mislav Marohnić 959968c46d
Support GEM_HOME, add limited support for user-installed gems (#1436)
The rehash process will now discover executables in additional locations:
- `~/.gem/ruby/<version>/bin/*`
- `$GEM_HOME/bin`

The `rbenv which` (and thus `rbenv exec`) command will also search these locations when looking up a command. This enables shims to dispatch calls to executables added by `gem install --user-install`.

Note that this support is limited:
- It will only work with C Ruby, as it's difficult to guess the `~/.gem/<engine>/<version>` directory for other Rubies without actually loading Ruby;
- It will only work for RBENV_VERSION values in the format `X.Y.Z` and not "system".
2022-09-26 02:57:15 +02:00

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#!/usr/bin/env bash
#
# Summary: Display the full path to an executable
#
# Usage: rbenv which <command>
#
# Displays the full path to the executable that rbenv will invoke when
# you run the given command.
set -e
[ -n "$RBENV_DEBUG" ] && set -x
# Provide rbenv completions
if [ "$1" = "--complete" ]; then
exec rbenv-shims --short
fi
remove_from_path() {
local path_to_remove="$1"
local path_before
local result=":${PATH//\~/$HOME}:"
while [ "$path_before" != "$result" ]; do
path_before="$result"
result="${result//:$path_to_remove:/:}"
done
result="${result%:}"
echo "${result#:}"
}
RBENV_COMMAND="$1"
if [ -z "$RBENV_COMMAND" ]; then
rbenv-help --usage which >&2
exit 1
fi
RBENV_VERSION="${RBENV_VERSION:-$(rbenv-version-name)}"
if [ "$RBENV_VERSION" = "system" ]; then
PATH="$(remove_from_path "${RBENV_ROOT}/shims")" \
RBENV_COMMAND_PATH="$(command -v "$RBENV_COMMAND" || true)"
else
RBENV_COMMAND_PATH="${RBENV_ROOT}/versions/${RBENV_VERSION}/bin/${RBENV_COMMAND}"
if [ ! -x "$RBENV_COMMAND_PATH" ]; then
# discover user-install'ed gem executables
if [ -n "$GEM_HOME" ]; then
user_install_path="${GEM_HOME}/bin/${RBENV_COMMAND}"
else
# FIXME: guessing this path is very fragile and works only for C Ruby
user_install_path="${HOME}/.gem/ruby/${RBENV_VERSION%.*}.0/bin/${RBENV_COMMAND}"
fi
[ -x "$user_install_path" ] && RBENV_COMMAND_PATH="$user_install_path"
unset user_install_path
fi
fi
OLDIFS="$IFS"
IFS=$'\n' scripts=(`rbenv-hooks which`)
IFS="$OLDIFS"
for script in "${scripts[@]}"; do
source "$script"
done
if [ -x "$RBENV_COMMAND_PATH" ]; then
echo "$RBENV_COMMAND_PATH"
elif [ "$RBENV_VERSION" != "system" ] && [ ! -d "${RBENV_ROOT}/versions/${RBENV_VERSION}" ]; then
echo "rbenv: version \`$RBENV_VERSION' is not installed (set by $(rbenv-version-origin))" >&2
exit 1
else
echo "rbenv: $RBENV_COMMAND: command not found" >&2
versions="$(rbenv-whence "$RBENV_COMMAND" || true)"
if [ -n "$versions" ]; then
{ echo
echo "The \`$1' command exists in these Ruby versions:"
echo "$versions" | sed 's/^/ /g'
echo
} >&2
fi
exit 127
fi