Fix cargo-binstall installation

Fixes #10

CHANGELOG.md

@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Fix cargo-binstall installation on macOS and Windows.
+
 ## [1.5.10] - 2022-07-24
 
 - Update `parse-changelog@latest` to 0.5.0.

main.sh

@@ -33,7 +33,7 @@ info() {
 install_cargo_binstall() {
     cargo_bin="${CARGO_HOME:-$HOME/.cargo}/bin"
 
-    if [ ! -f "${cargo_bin}/cargo-binstall" ]; then
+    if [[ ! -f "${cargo_bin}/cargo-binstall" ]]; then
         info "installing cargo-binstall"
 
         target="$(rustc -vV | grep host | cut -c 7-)"
@@ -62,7 +62,10 @@ install_cargo_binstall() {
             *) bail "unsupported target '${target}' for cargo-binstall" ;;
         esac
 
-        if [ $is_zip = true ]; then
+        mkdir -p .install-action-tmp
+        (
+            cd .install-action-tmp
+            if [[ "${is_zip}" == "true" ]]; then
                 retry curl --proto '=https' --tlsv1.2 -fsSL --retry 10 --retry-connrefused "$url" -o "cargo-binstall-${target}.zip"
                 unzip "cargo-binstall-${target}.zip"
                 rm "cargo-binstall-${target}.zip"
@@ -76,6 +79,8 @@ install_cargo_binstall() {
                 cygwin* | msys*) mv cargo-binstall.exe "${cargo_bin}/" ;;
                 *) mv cargo-binstall "${cargo_bin}/" ;;
             esac
+        )
+        rm -rf .install-action-tmp
     else
         info "cargo-binstall already installed on in ${cargo_bin}/cargo-binstall"
     fi