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Speed up rbenv-rehash with a simpler indexing approach

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This commit is contained in:
Sam Stephenson 2012-12-27 17:08:54 -06:00
parent c3fe192243
commit df9bbd7ab3
1 changed files with 13 additions and 45 deletions
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58
libexec/rbenv-rehash
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@ -55,58 +55,27 @@ make_shims() {
done
}
# Create an empty array for the list of registered shims.
# Create an empty array for the list of registered shims and an empty
# string to use as a search index.
registered_shims=()
registered_shims_index=""
# We will keep track of shims registered for installation with the
# global `reigstered_shims` array and with a global variable for each
# shim. The array will let us iterate over all registered shims. The
# global variables will let us quickly check whether a shim with the
# given name has been registered or not.
# global `reigstered_shims` array and with a global search index
# string. The array will let us iterate over all registered shims. The
# index string will let us quickly check whether a shim with the given
# name has been registered or not.
register_shim() {
local shim="$@"
local var="$(shim_variable_name "$shim")"
if [ -z "${!var}" ]; then
registered_shims[${#registered_shims[*]}]="$shim"
eval "${var}=1"
fi
}
# To compute the global variable name for a given shim we must first
# escape any non-alphanumeric characters. If the shim name is
# alphanumeric (including a hyphen or underscore) we can take a
# shorter path. Otherwise, we must iterate over each character and
# escape the non-alphanumeric ones using `printf`.
shim_variable_name() {
local shim="$1"
local result="_shim_"
if [[ ! "$shim" =~ [^[:alnum:]_-] ]]; then
shim="${shim//_/_5f}"
shim="${shim//-/_2d}"
result="$result$shim"
else
local length="${#shim}"
local char i
for ((i=0; i<length; i++)); do
char="${shim:$i:1}"
if [[ "$char" =~ [[:alnum:]] ]]; then
result="$result$char"
else
result="$result$(printf "_%02x" \'"$char")"
fi
done
fi
echo "$result"
registered_shims["${#registered_shims[@]}"]="$shim"
registered_shims_index="$registered_shims_index/$shim/"
}
# To install all the registered shims, we iterate over the
# `registered_shims` array and create a link if one does not already
# exist.
install_registered_shims() {
local shim
for shim in "${registered_shims[@]}"; do
[ -e "$shim" ] || ln -f "$PROTOTYPE_SHIM_PATH" "$shim"
done
@ -117,11 +86,10 @@ install_registered_shims() {
# in the directory but has not been registered as a shim should be
# removed.
remove_stale_shims() {
local var
local shim
for shim in *; do
var="$(shim_variable_name "$shim")"
if [ -z "${!var}" ]; then
rm -f "$shim"
if [[ "$registered_shims_index" != *"/$shim/"* ]]; then
rm -f "$shim"
fi
done
}