Use cat instead of read -r to stream stdin to file (#120)

* Use `cat` instead of `read -r` to stream stdin to file

* Cleanup dmd-wrapper

* Fix typo

* Make wrapper work on macOS

* Use fifo instead of temporary file

* Fix stdin-wrapper

* Use `awk` instead of `read` hackery

* Finish refactoring

* Fix `exec` issue

* Add myself as an coauthor of wrapper scripts (no shame at all :P)

* Fix dmd-wrapper

* Extract check_dubfile

stdin-wrapper

@@ -1,20 +1,28 @@
 #!/usr/bin/env bash
 
-# Author: w0rp <devw0rp@gmail.com>
+# Authors: w0rp <devw0rp@gmail.com>, hauleth <lukasz@niemier.pl>
 # Description: This script implements a wrapper for any program which does not accept
 #   stdin input on most Unix machines. The input to the script is read to a
 #   temporary file, and the first argument sets a particular file extension
 #   for the temporary file.
 
+set -eu
+
 # All of the following arguments are read as command to run.
 file_extension="$1"
 shift
 
-temp_file=$(mktemp --tmpdir "ale-XXXXXXXXX$file_extension")
-trap 'rm $temp_file' EXIT
+temp_dir=$(mktemp -d 2>/dev/null || mktemp -d -t 'ale_linter')
+temp_file="$temp_dir/file$file_extension"
+trap 'rm -r "$temp_dir"' EXIT
 
-while read -r; do
-    echo "$REPLY" >> "$temp_file"
-done
+# In perfect world it wouldn't be needed, but some tools (`go vet`, I am looking
+# at you) do not fit in line and require filename ending. Otherwise it would be
+# simple as
+#
+#     "$@" /dev/stdin
+#
+# without all that hackery with copying `/dev/stdin`
+cp /dev/stdin "$temp_file"
 
 "$@" "$temp_file"