Fix install script (#1844)

www/install.sh

@@ -30,19 +30,15 @@ url=https://github.com/casey/just
 releases=$url/releases
 
 say() {
-  echo "install: $@"
-}
-
-say_err() {
-  say "$@" >&2
+  echo "install: $@" >&2
 }
 
 err() {
   if [ ! -z ${td-} ]; then
-    rm -rf $td
+    rm -rf "$td"
   fi
 
-  say_err "error: $@"
+  say "error: $@"
   exit 1
 }
 
@@ -80,14 +76,12 @@ while test $# -gt 0; do
   shift
 done
 
-# Dependencies
 need curl
 need install
 need mkdir
 need mktemp
 need tar
 
-# Optional dependencies
 if [ -z ${tag-} ]; then
   need grep
   need cut
@@ -102,7 +96,9 @@ if [ -z ${dest-} ]; then
 fi
 
 if [ -z ${tag-} ]; then
-  tag=$(curl --proto =https --tlsv1.2 -sSf https://api.github.com/repos/casey/just/releases/latest |
+  tag=$(
+    curl --proto =https --tlsv1.2 -sSf \
+      https://api.github.com/repos/casey/just/releases/latest |
     grep tag_name |
     cut -d'"' -f4
   )
@@ -120,15 +116,14 @@ if [ -z ${target-} ]; then
     arm64-Darwin)      target=aarch64-apple-darwin;;
     x86_64-Darwin)     target=x86_64-apple-darwin;;
     x86_64-Linux)      target=x86_64-unknown-linux-musl;;
-    x86_64-Windows_NT) target=x86_64-pc-windows-msvc;;
     x86_64-MINGW64_NT) target=x86_64-pc-windows-msvc;;
+    x86_64-Windows_NT) target=x86_64-pc-windows-msvc;;
     *)
       err 'Could not determine target from output of `uname -m`-`uname -s`, please use `--target`:' $uname_target
     ;;
   esac
 fi
 
-# windows archives are zips, not tarballs
 case $target in
   x86_64-pc-windows-msvc) extension=zip; need unzip;;
   *)                      extension=tar.gz;;
@@ -136,32 +131,27 @@ esac
 
 archive="$releases/download/$tag/$crate-$tag-$target.$extension"
 
-say_err "Repository:  $url"
-say_err "Crate:       $crate"
-say_err "Tag:         $tag"
-say_err "Target:      $target"
-say_err "Destination: $dest"
-say_err "Archive:     $archive"
+say "Repository:  $url"
+say "Crate:       $crate"
+say "Tag:         $tag"
+say "Target:      $target"
+say "Destination: $dest"
+say "Archive:     $archive"
 
 td=$(mktemp -d || mktemp -d -t tmp)
 
 if [ "$extension" = "zip" ]; then
-    # unzip on windows cannot always handle stdin, so download first.
   curl --proto =https --tlsv1.2 -sSfL $archive > $td/just.zip
   unzip -d $td $td/just.zip
 else
   curl --proto =https --tlsv1.2 -sSfL $archive | tar -C $td -xz
 fi
 
-for f in $(ls $td); do
-  test -x $td/$f || continue
-
-  if [ -e "$dest/$f" ] && [ $force = false ]; then
-    err "$f already exists in $dest"
-  else
+if [ -e "$dest/just" ] && [ $force = false ]; then
+  err "\`$dest/just\` already exists"
+else
   mkdir -p $dest
-    install -m 755 $td/$f $dest
-  fi
-done
+  install -m 755 "$td/just" $dest
+fi
 
 rm -rf $td