mirror of
https://github.com/pyenv/pyenv.git
synced 2024-12-23 05:41:05 +00:00
79 lines
2.2 KiB
Bash
Executable file
79 lines
2.2 KiB
Bash
Executable file
#!/usr/bin/env bash
|
|
set -e
|
|
[ -n "$RBENV_DEBUG" ] && set -x
|
|
|
|
SHIM_PATH="${RBENV_ROOT}/shims"
|
|
PROTOTYPE_SHIM_PATH="${SHIM_PATH}/.rbenv-shim"
|
|
|
|
# Create the shims directory if it doesn't already exist.
|
|
mkdir -p "$SHIM_PATH"
|
|
|
|
# Ensure only one instance of rbenv-rehash is running at a time by
|
|
# setting the shell's `noclobber` option and attempting to write to
|
|
# the prototype shim file. If the file already exists, print a warning
|
|
# to stderr and exit with a non-zero status.
|
|
set -o noclobber
|
|
{ echo > "$PROTOTYPE_SHIM_PATH"
|
|
} 2>/dev/null ||
|
|
{ echo "rbenv: cannot rehash: $PROTOTYPE_SHIM_PATH exists"
|
|
exit 1
|
|
} >&2
|
|
set +o noclobber
|
|
|
|
# If we were able to obtain a lock, register a trap to clean up the
|
|
# prototype shim when the process exits.
|
|
trap remove_prototype_shim SIGINT SIGTERM EXIT
|
|
|
|
remove_prototype_shim() {
|
|
rm -f "$PROTOTYPE_SHIM_PATH"
|
|
}
|
|
|
|
# The prototype shim file is a script that re-execs itself, passing
|
|
# its filename and any arguments to `rbenv exec`. This file is
|
|
# hard-linked for every binary and then removed. The linking technique
|
|
# is fast, uses less disk space than unique files, and also serves as
|
|
# a locking mechanism.
|
|
create_prototype_shim() {
|
|
cat > "$PROTOTYPE_SHIM_PATH" <<SH
|
|
#!/usr/bin/env bash
|
|
set -e
|
|
export RBENV_ROOT="$RBENV_ROOT"
|
|
exec rbenv exec "\${0##*/}" "\$@"
|
|
SH
|
|
chmod +x "$PROTOTYPE_SHIM_PATH"
|
|
}
|
|
|
|
# Make shims by iterating over every filename argument and creating a
|
|
# hard link from the prototype shim to a file of the same name in the
|
|
# shims directory, if one does not already exist.
|
|
make_shims() {
|
|
local glob="$@"
|
|
|
|
for file in $glob; do
|
|
local shim="${file##*/}"
|
|
[ -e "$shim" ] || ln -f "$PROTOTYPE_SHIM_PATH" "$shim"
|
|
done
|
|
}
|
|
|
|
# Save the working directory.
|
|
CUR_PATH=$PWD
|
|
|
|
# Empty out the shims directory and make it the working directory.
|
|
rm -f "$SHIM_PATH"/*
|
|
cd "$SHIM_PATH"
|
|
|
|
# Create the prototype shim, then make shims for all known binaries.
|
|
create_prototype_shim
|
|
shopt -s nullglob
|
|
make_shims ../versions/*/bin/*
|
|
|
|
# Find and run any plugins that might want to make shims too.
|
|
RBENV_REHASH_PLUGINS=(/etc/rbenv.d/rehash/*.bash ${RBENV_ROOT}/rbenv.d/rehash/*.bash)
|
|
shopt -u nullglob
|
|
|
|
# Restore the previous working directory.
|
|
cd "$CUR_PATH"
|
|
|
|
for script in ${RBENV_REHASH_PLUGINS[@]}; do
|
|
source $script
|
|
done
|