From 039652c2b918524ae842f995e66e5ee709138e95 Mon Sep 17 00:00:00 2001
From: Connor Olding <cloningdonor@gmail.com>
Date: Wed, 5 Oct 2022 04:01:29 -0700
Subject: [PATCH] meta: rewrite auto-update in cursed code style

---
 auto-update | 83 ++++++++++++++++++++++++++---------------------------
 1 file changed, 40 insertions(+), 43 deletions(-)

diff --git a/auto-update b/auto-update
index b190ee8..6027e6f 100755
--- a/auto-update
+++ b/auto-update
@@ -1,48 +1,45 @@
 #!/usr/bin/env sh
 
 note() { printf >&2 '\033[1m%s\033[0m\n' "$*" ;}
+latest() { : \
+ && url="${1?huh}" \
+ &&  {  [ "${url#"https://github.com/"}" = "$url" ] \
+     && re='/commit/' || re='/spoofed_commit_check/' \
+     ;} \
+ && curl $flags "$url" | grep -F "$re" | grep -Eo '[0-9a-f]{40}' \
+ ;}
 
-investigate() {
-    url="${1?huh}"
-    [ "${url#"https://github.com/"}" = "$url" ] \
-    && re='/commit/' || re='/spoofed_commit_check/'
-    curl $curlflags "$url" | grep -F "$re" | grep -Eo '[0-9a-f]{40}'
-}
-
-me="$(readlink -f "$0")" && cd "${me%/*}" || exit
-curlflags="-L --no-progress-meter"
-any=0
-set -- \
-cosmo           COSMO_COMMIT    https://github.com/jart/cosmopolitan \
-cosmo-kuroko    KUROKO_COMMIT   https://github.com/kuroko-lang/kuroko \
-cosmo-muon      MUON_COMMIT     https://git.sr.ht/~lattis/muon \
-cosmo-perl      PERL_COMMIT     https://github.com/G4Vi/perl5/tree/cosmo \
-cosmo-python    PYTHON_COMMIT   https://github.com/ahgamut/cpython/tree/cosmo_py311 \
-cosmo-yices     KISSAT_COMMIT   https://github.com/BrunoDutertre/kissat \
-cosmo-yices     YICES_COMMIT    https://github.com/SRI-CSL/yices2 \
+: \
+ && any=0 flags="-L --no-progress-meter" n="$(printf '\n.')" n="${n%.}" \
+ && df=Dockerfile gh='https://github.com/' sr='https://git.sr.ht/~' \
+ && set -- \
+    cosmo           COSMO_COMMIT    ${gh}jart/cosmopolitan \
+    cosmo-kuroko    KUROKO_COMMIT   ${gh}kuroko-lang/kuroko \
+    cosmo-muon      MUON_COMMIT     ${sr}lattis/muon \
+    cosmo-perl      PERL_COMMIT     ${gh}G4Vi/perl5/tree/cosmo \
+    cosmo-python    PYTHON_COMMIT   ${gh}ahgamut/cpython/tree/cosmo_py311 \
+    cosmo-yices     KISSAT_COMMIT   ${gh}BrunoDutertre/kissat \
+    cosmo-yices     YICES_COMMIT    ${gh}SRI-CSL/yices2 \
+ && me="$(readlink -f "$0")" && cd "${me%/*}" \
+ && while [ $# != 0 ] \
+    ;do dir="$1" tag="$2" url="$3" \
+     && { shift && shift && shift || { note 'incomplete triplet'; exit 70 ;} ;} \
+     &&  if ! [ -d "$dir" ] && ! [ -f "$dir/$df" ] && ! [ -s "$dir/$df" ] \
+        ;then note "missing $df, skipping $dir ($tag)"; continue \
+        ;fi \
+     && ours="$(grep -F "$tag"= "$dir/$df" | grep -Eo '[0-9a-f]{40}')" \
+     && theirs="$(latest "$url")" ours="${ours%%$n*}" theirs="${theirs%%$n*}" \
+     &&  if [ ${#ours} = 0 ] || [ ${#theirs} = 0 ] \
+        ;then note "failed to retrieve update for $dir ($tag)" \
+        ;elif [ "$ours" != "$theirs" ] \
+        ;then any=1 && note "updating $dir ($tag)" \
+         && other="${tag%_COMMIT}_SHA256" && tgz="${url%/}" \
+         && tgz="${tgz%%/tree/*}" && tgz="$tgz/archive/$theirs.tar.gz" \
+         &&  {  sum="$(curl $flags "$tgz" | sha256sum - | awk '{print $1}')" \
+             && notwa-util/shed "$dir/$df" "s/$ours/$theirs/g" \
+             && notwa-util/shed "$dir/$df" "s/$other=.*/$other=$sum/g" \
+             ;} \
+         || note "failed to apply update for $dir ($tag)" \
+    ;fi ;done \
+ && { [ $any = 1 ] || note "no new updates" ;} \
 ;
-
-while [ $# != 0 ]; do
-    dir="$1" tag="$2" url="$3"
-    shift && shift && shift || { note 'not a multiple of 3!'; exit 255 ;}
-    if ! [ -d "$dir" -a -f "$dir/Dockerfile" -a -s "$dir/Dockerfile" ]; then
-        note "missing Dockerfile, skipping $dir ($tag)"
-        continue
-    fi
-    ours="$(grep -F "$tag"= "$dir/Dockerfile" | grep -Eo '[0-9a-f]{40}' | head -n1)"
-    theirs="$(investigate "$url" | head -n1)"
-    if [ ${#ours} == 0 -o ${#theirs} == 0 ]; then
-        note "failed to retrieve update for $dir ($tag)"
-    elif [ "$ours" != "$theirs" ]; then
-        any=1 && note "updating $dir ($tag)"
-        other="${tag%_COMMIT}_SHA256"
-        tgz="${url%/}" && tgz="${tgz%%/tree/*}" && tgz="$tgz/archive/$theirs.tar.gz"
-        { : \
-         && sum="$(curl $curlflags "$tgz" | sha256sum - | awk '{print $1}')" \
-         && notwa-util/shed "$dir/Dockerfile" "s/$ours/$theirs/g" \
-         && notwa-util/shed "$dir/Dockerfile" "s/$other=.*/$other=$sum/g" \
-         ;} \
-     || note "failed to apply update for $dir ($tag)"
-    fi
-done
-[ $any = 1 ] || note "no new updates"