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Improve performance of rbenv-which when RBENV_VERSION=system

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This implements removing of the shims path element via bash
substitution, instead of jumping around in all the `$PATH` elements.
This commit is contained in:
Daniel Hahler 2014-03-13 19:45:11 +01:00 committed by Mislav Marohnić
parent 6bb7f07d2d
commit e4cbf04592
2 changed files with 37 additions and 34 deletions
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46
libexec/rbenv-which
View file

@ -15,38 +15,6 @@ if [ "$1" = "--complete" ]; then
exec rbenv shims --short
fi
expand_path() {
if [ ! -d "$1" ]; then
return 1
fi
local cwd="$(pwd)"
cd "$1"
pwd
cd "$cwd"
}
remove_from_path() {
local path_to_remove="$(expand_path "$1")"
local result=""
if [ -z "$path_to_remove" ]; then
echo "${PATH}"
return
fi
local paths
IFS=: paths=($PATH)
for path in "${paths[@]}"; do
path="$(expand_path "$path" || true)"
if [ -n "$path" ] && [ "$path" != "$path_to_remove" ]; then
result="${result}${path}:"
fi
done
echo "${result%:}"
}
RBENV_COMMAND="$1"
@ -58,8 +26,18 @@ fi
RBENV_VERSION="${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)"
# Remove shims from PATH. Use a loop, because Bash won't remove all ":foo:"
# in ":foo:foo:" in one go.
path=":$PATH:"
remove="${RBENV_ROOT}/shims"
while true; do
path_before="$path"
path="${path//:$remove:/:}"
if [[ "$path_before" = "$path" ]]; then
break
fi
done
RBENV_COMMAND_PATH="$(PATH=$path command -v "$RBENV_COMMAND" || true)"
else
RBENV_COMMAND_PATH="${RBENV_ROOT}/versions/${RBENV_VERSION}/bin/${RBENV_COMMAND}"
fi

25
test/which.bats
View file

@ -31,6 +31,31 @@ create_executable() {
assert_success "${RBENV_TEST_DIR}/bin/kill-all-humans"
}
@test "searches PATH for system version (shims prepended)" {
create_executable "${RBENV_TEST_DIR}/bin" "kill-all-humans"
create_executable "${RBENV_ROOT}/shims" "kill-all-humans"
PATH="${RBENV_ROOT}/shims:$PATH" RBENV_VERSION=system run rbenv-which kill-all-humans
assert_success "${RBENV_TEST_DIR}/bin/kill-all-humans"
}
@test "searches PATH for system version (shims appended)" {
create_executable "${RBENV_TEST_DIR}/bin" "kill-all-humans"
create_executable "${RBENV_ROOT}/shims" "kill-all-humans"
PATH="$PATH:${RBENV_ROOT}/shims" RBENV_VERSION=system run rbenv-which kill-all-humans
assert_success "${RBENV_TEST_DIR}/bin/kill-all-humans"
}
@test "searches PATH for system version (shims spread)" {
create_executable "${RBENV_TEST_DIR}/bin" "kill-all-humans"
create_executable "${RBENV_ROOT}/shims" "kill-all-humans"
PATH="${RBENV_ROOT}/shims:${RBENV_ROOT}/shims:/tmp/non-existent:$PATH:${RBENV_ROOT}/shims" \
RBENV_VERSION=system run rbenv-which kill-all-humans
assert_success "${RBENV_TEST_DIR}/bin/kill-all-humans"
}
@test "version not installed" {
create_executable "2.0" "rspec"
RBENV_VERSION=1.9 run rbenv-which rspec