From 582fff004782c24abfe39d0b300f94d31233466d Mon Sep 17 00:00:00 2001
From: Phantop <phantop@tuta.io>
Date: Fri, 25 Mar 2022 18:52:40 -0400
Subject: [PATCH] zzexe: moved here from my dotfiles

---
 README.md | 19 ++++++++++++++++++-
 zzexe     | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 1 deletion(-)
 create mode 100755 zzexe

diff --git a/README.md b/README.md
index 2ea0454..f1dd360 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,24 @@ For your own programs, simply create an AppImage-style AppDir and run `appdwarf
 You can also invoke `appdwarf -a {appimage}` to convert an apimage. 
 I suggest checking the help (listed via `appdwarf --help`) for other options.
 
-The apps folder contains other scripts for specific programs that will download all necessary files and create a resulting appdwarf in the same folder.
+The apps folder contains other scripts for specific programs that will download all
+necessary files and create a resulting appdwarf in the same folder.
+
+## `zzexe`
+
+`zzexe` is a small tool similar to `gzexe` that instead uses zstd to compress single applications.
+I've included it because it has a similar goal to `appdwarf` on the whole, just on a smaller scale.
+
+I wrote it in part because I felt that `gzexe` was overly complicated, as I used to 
+just use a lightly modified version of it that replaces `gzip` with `zstd`,
+and to add a couple additional features. 
+
+It supports adding in a prefix command to the file using the `-p` options e.g.
+`zzexe -p wine some.exe` will generate a compressed file that will then run the exe.
+
+It also automatically appends the extension of the source file to the temporary file
+created when ran since some programs care about that, such as an emulator only
+running games of an expected file extension.
 
 ## Known Issues
 
diff --git a/zzexe b/zzexe
new file mode 100755
index 0000000..45eb559
--- /dev/null
+++ b/zzexe
@@ -0,0 +1,34 @@
+#!/bin/sh
+tmp=$(mktemp -u)
+if [ "$1" = "-d" ]; then
+    shift
+    tail -n +11 "$1" | zstd -do "$tmp" &&
+    mv "$tmp" "$1"
+    chmod +x "$1"
+    exit
+fi
+
+if [ "$1" = "-p" ]; then
+    shift
+    prefix="$1 "
+    shift
+fi
+
+echo '#!/bin/sh' >> "$tmp"
+echo 'out=$(mktemp -t .zzXXXX.'"${1##*.}"\) >> "$tmp"
+cat >> "$tmp" << 'EOF'
+dir=$(dirname "$0")
+tail -n +11 "$0" | zstd -cd > "$out"
+chmod +x "$out"
+ln -s "$out" "$dir"
+trap "res=$?" 0 1 2 3 5 10 13 15
+EOF
+echo "$prefix"'$dir/$(basename $out) "$@"' >> "$tmp"
+cat >> "$tmp" << 'EOF'
+rm "$out" "$dir"/$(basename $out)
+exit $res
+EOF
+
+zstdmt --ultra -c22 --long "$1" >> "$tmp" || exit 1
+mv "$tmp" "$1"
+chmod +x "$1"