first pass over sh: improve compatibility, fix stuff

sh/arith

@@ -1,8 +1,14 @@
 #!/usr/bin/env zsh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
+
+# though technically compatible with other shells,
+# extra functionality is through zsh's extended arithmetic functions.
 
 arith() {
-    <<<"$(($@))"
+#   <<<"$(($@))"
+    printf "%s\n" "$(($@))"
 }
 
 [ "${SOURCING:-0}" -gt 0 ] || arith "$@"

sh/arrays

@@ -1,5 +1,7 @@
 #!/usr/bin/env false
 # YES_ZSH
+# YES_BASH
+# NO_DASH
 
 whoa=(
     -Wall

sh/aur

@@ -2,6 +2,8 @@
 # http://aur.sh with massive feature creep
 # YES_ZSH
 
+# TODO: check compatibility with bash and dash.
+
 aur() {
     trap 'exit 1' SIGINT SIGTERM
 

sh/autosync

@@ -1,5 +1,9 @@
 #!/usr/bin/env zsh
 # YES_ZSH
+# NO_BASH
+# NO_DASH
+
+# TODO: portable way of dodging aliases to allow other shell support?
 
 autosync() {
     target="$1"

sh/bak

@@ -1,14 +1,16 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 bak() {
     [ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
     local ret=0
     for f; do
-        if [ -s "$f.bak" ]; then
+        if [ -e "$f.bak" ]; then
             bak "$f.bak" || ret=1
         fi
-        cp -p "$f" "$f.bak"
+        cp -p "$f" "$f.bak" || ret=1
     done
     return $ret
 }

sh/baks

@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 #SOURCING=$((SOURCING+1))
 #. ~/sh/note # FIXME: don't do this?
@@ -11,7 +13,8 @@ baks() { # backup, timestamped
         local now="$(date -u '+%y-%m-%d_%H-%M-%S')"
         local bak="$fp.$now.bak"
         if [ -s "$bak" ]; then
-            note "how in the hell?" "$bak" "already exists"
+            #note "how in the hell?" "$bak" "already exists"
+            printf "%s %s %s\n" "how in the hell?" "$bak" "already exists"
             ret=1
         fi
         cp -p "$fp" "$bak" || ret=1

sh/bin

@@ -1,9 +1,11 @@
 #!/usr/bin/env zsh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 bin() {
     local a="$(($@))"
-    let 'a=(((((((((((((a + 0x0FFFFF80) & 0x1000007F) + 0x00FFFFC0) & 0x1100003F) + 0x000FFFE0) & 0x1110001F) + 0x0000FFF0) & 0x1111000F) + 0x00000FF8) & 0x11111007) + 0x000000FC) & 0x11111103) + 0x0000000E) & 0x11111111'
+    a="$(((((((((((((((a + 0x0FFFFF80) & 0x1000007F) + 0x00FFFFC0) & 0x1100003F) + 0x000FFFE0) & 0x1110001F) + 0x0000FFF0) & 0x1111000F) + 0x00000FF8) & 0x11111007) + 0x000000FC) & 0x11111103) + 0x0000000E) & 0x11111111))"
     printf "%08X\n" "$a"
 }
 

sh/cdbusiest

@@ -4,7 +4,7 @@
 cdbusiest() {
     dbusiest | read -r c d
     [ -z $c ] && return 1
-    <<<"$c $d"
+    printf "%s\n" "$c $d"
     cd $d
 }
 

sh/colors

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 # YES_ZSH
+# YES_BASH
+# NO_DASH
 
 colors() {
     printf "\e[%dm$(printf " \e[%dm mV \e[40m" {4,10}{0..7})\e[0m\n" {3,9}{0..7}

sh/compandy

@@ -1,6 +1,6 @@
 #!/usr/bin/zsh
-# YES_ZSH
 # script to make sense of compand's parameters
+# YES_ZSH
 
 compandy() {
     if [ $# -eq 0 ]; then

sh/compile

@@ -1,5 +1,7 @@
 #!/usr/bin/env zsh
 # YES_ZSH
+# NO_BASH
+# NO_DASH
 
 # I'll just leave this here...
 __setup_clang_ubuntu() {
@@ -54,51 +56,54 @@ compile() {
 
         local winkit
         printf "%s\n" "/c/Program Files (x86)/Windows Kits/"*(on/N[1]) | read -r winkit
-        [ -n "$winkit" ] || { echo "failed glob; missing winkit" >&2; return 1 }
-        printf "%s\n" "$winkit/Lib/"*(On/N[1]) | read -r winkit
-        [ -n "$winkit" ] || { echo "failed glob; missing winkit" >&2; return 1 }
+        [ -z "$winkit" ] || printf "%s\n" "$winkit/Lib/"*(On/N[1]) | read -r winkit
 
-        # detect MSVC.
-        local clarch
-        local arch
-        local msvc_dig_deep
-        [ "$MSYSTEM" = MINGW64 ] && clarch="/amd64" || clarch=""
-        [ "$MSYSTEM" = MINGW64 ] && arch="x64" || arch="x86"
-        if [ -d "/c/Program Files (x86)/Microsoft Visual Studio" ]; then # 2017+
-            printf "%s\n" "/c/Program Files (x86)/Microsoft Visual Studio/20"*(On/N[1]) | read vc
-            printf "%s\n" "$vc"/*/VC | read vc
-            printf "%s\n" "$vc/Tools/MSVC/"*(On/N[1]) | read vc
-            msvc_dig_deep="yes"
-        else # older versions
-            printf "%s\n" "/c/Program Files (x86)/Microsoft Visual Studio "*(On/N[1]) | read vc
-            vc="$vc/VC"
-        fi
+        if [ -z "$winkit" ]; then
+            #echo "failed glob; missing winkit" >&2
+            :
+        else
+            # detect MSVC.
+            local clarch
+            local arch
+            local msvc_dig_deep
+            [ "$MSYSTEM" = MINGW64 ] && clarch="/amd64" || clarch=""
+            [ "$MSYSTEM" = MINGW64 ] && arch="x64" || arch="x86"
+            if [ -d "/c/Program Files (x86)/Microsoft Visual Studio" ]; then # 2017+
+                printf "%s\n" "/c/Program Files (x86)/Microsoft Visual Studio/20"*(On/N[1]) | read vc
+                printf "%s\n" "$vc"/*/VC | read vc
+                printf "%s\n" "$vc/Tools/MSVC/"*(On/N[1]) | read vc
+                msvc_dig_deep="yes"
+            else # older versions
+                printf "%s\n" "/c/Program Files (x86)/Microsoft Visual Studio "*(On/N[1]) | read vc
+                vc="$vc/VC"
+            fi
 
-        # setup MSVC.
-        if [ -n "$msvc_dig_deep" ] && [ -e "$vc/bin/Host$arch/$arch/cl" ]; then
-            cl="$vc/bin/Host$arch/$arch/cl"
-            export PATH="$PATH:$vc/bin/Host$arch/$arch"
-            export LIB="$(cygpath -w "$vc/lib/$arch")"
-            export LIBPATH="$(cygpath -w "$vc/lib/$arch")"
-        elif [ -d "$vc/bin$clarch" ] && [ -e "$vc/bin$clarch/$cl" ]; then
-            cl="$vc/bin$clarch/cl"
-            export PATH="$PATH:$vc/bin$clarch"
-            export LIB="$(cygpath -w "$vc/LIB$clarch")"
-            export LIBPATH="$(cygpath -w "$vc/LIB$clarch")"
-        fi
+            # setup MSVC.
+            if [ -n "$msvc_dig_deep" ] && [ -e "$vc/bin/Host$arch/$arch/cl" ]; then
+                cl="$vc/bin/Host$arch/$arch/cl"
+                export PATH="$PATH:$vc/bin/Host$arch/$arch"
+                export LIB="$(cygpath -w "$vc/lib/$arch")"
+                export LIBPATH="$(cygpath -w "$vc/lib/$arch")"
+            elif [ -d "$vc/bin$clarch" ] && [ -e "$vc/bin$clarch/$cl" ]; then
+                cl="$vc/bin$clarch/cl"
+                export PATH="$PATH:$vc/bin$clarch"
+                export LIB="$(cygpath -w "$vc/LIB$clarch")"
+                export LIBPATH="$(cygpath -w "$vc/LIB$clarch")"
+            fi
 
-        # finish up.
-        if [ -n "$cl" ]; then
-            export INCLUDE="$(cygpath -w "$vc/INCLUDE")"
-            export INCLUDE="$INCLUDE;$(cygpath -w "${winkit/Lib/Include}/ucrt")"
-            export LIB="$LIB;$(cygpath -w "$winkit/um/$arch")"
-            export LIB="$LIB;$(cygpath -w "$winkit/ucrt/$arch")"
+            # finish up.
+            if [ -n "$cl" ]; then
+                export INCLUDE="$(cygpath -w "$vc/INCLUDE")"
+                export INCLUDE="$INCLUDE;$(cygpath -w "${winkit/Lib/Include}/ucrt")"
+                export LIB="$LIB;$(cygpath -w "$winkit/um/$arch")"
+                export LIB="$LIB;$(cygpath -w "$winkit/ucrt/$arch")"
 
-            for d in "${(@s/;/)INCLUDE}"; do
-                clang_flags+=(-I"$d")
-            done
-            # ignore MSVC's non-standard deprecation warnings.
-            clang_flags+=(-D_CRT_SECURE_NO_WARNINGS)
+                for d in "${(@s/;/)INCLUDE}"; do
+                    clang_flags+=(-I"$d")
+                done
+                # ignore MSVC's non-standard deprecation warnings.
+                clang_flags+=(-D_CRT_SECURE_NO_WARNINGS)
+            fi
         fi
     fi
 

sh/confirm

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 # YES_ZSH
+# YES_BASH
+# NO_DASH
 
 if [ -n "${ZSH_VERSION:-}" ]; then
     confirm() {

sh/countdiff

@@ -1,7 +1,10 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 countdiff() {
+    [ $# -gt 1 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
     [ $# -le 2 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }
     git --no-pager diff --stat --no-color --no-index "$1" "$2" \
     | awk '/changed/{print $4+$6;a=1}END{if(!a)print 0}'

sh/cutv

@@ -1,5 +1,7 @@
 #!/usr/bin/env zsh
 # YES_ZSH
+# NO_BASH
+# NO_DASH
 
 cutv() {
     [ $# -le 4 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }

sh/days

@@ -1,5 +1,7 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 days() {
     [ $# -le 1 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }

sh/dbusiest

@@ -1,5 +1,7 @@
 #!/usr/bin/env zsh
 # YES_ZSH
+# NO_BASH
+# NO_DASH
 
 dbusiest() {
     [ $# -le 0 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }

sh/dfu

@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 dfu() {
     [ $# -le 0 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }

sh/disf

@@ -1,6 +1,10 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 # disassembles a function given its symbolic name.
 # YES_ZSH
+# YES_BASH
+# YES_DASH
+
+# TODO: actually test that this works with dash.
 
 function disf() {
     [ $# -le 2 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }

sh/e

@@ -1,5 +1,7 @@
 #!/usr/bin/env zsh
 # YES_ZSH
+# NO_BASH
+# NO_DASH
 
 e() {
     local editor=(${=EDITOR})

sh/ea

@@ -1,6 +1,8 @@
-#!/usr/bin/env bash
+#!/usr/bin/env false
 # remote file access (http file-sharing shenanigans)
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 _REMOTE_DOMAIN="https://eaguru.guru"
 _REMOTE_DIR="t"

sh/echo2

@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 echo2() {
     local IFS=" "

sh/explore

@@ -1,7 +1,10 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 explore() {
+    [ -n "$MSYSTEM" ] || { printf "%s\n" "$0: only for MSYS2" >&2; return 1; }
     [ $# -le 1 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }
     explorer "$(cygpath -w "${1:-.}")"
 }

sh/ff

@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 ff() {
     [ $# -le 1 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }

sh/has

@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 has() {
     if [ -n "$ZSH_VERSION" ]; then

sh/hex

@@ -1,5 +1,10 @@
 #!/usr/bin/env zsh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
+
+# though technically compatible with other shells,
+# extra functionality is through zsh's extended arithmetic functions.
 
 hex() {
     printf "%08X\n" "$(($@))"

sh/ify

@@ -1,5 +1,7 @@
 #!/usr/bin/sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 ify() {
     [ $# -ge 2 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }

sh/is_empty

@@ -1,9 +1,11 @@
 #!/usr/bin/env bash
 # YES_ZSH
+# YES_BASH
+# NO_DASH
 
 is_empty() {
-    while read -r; do
-        [ ! -d "$REPLY" ] && [ -s "$REPLY" ] && return 1
+    while read -r f; do
+        [ ! -d "$f" ] && [ -s "$f" ] && return 1
     done < <(find ${1:-.})
     # TODO: done < <(find ${1:-.} -type f -print -quit)
     # this needs to skip empty files as well.

sh/isup

@@ -1,5 +1,9 @@
 #!/usr/bin/zsh
 # YES_ZSH
+# NO_BASH
+# NO_DASH
+
+# TODO: damned substrings. rewrite to be semi-portable.
 
 isup() {
     local c

sh/maybesudo

@@ -1,10 +1,12 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 maybesudo_() {
     local name
     local env_cleanup=0
-    while getopts ':AEHKPSVbhiklnsvC:U:g:p:r:t:u:' name; do
+    while getopts :AEHKPSVbhiklnsvC:U:g:p:r:t:u: name; do
         case $name in
         K|V|k)
         # K: sure kill
@@ -122,6 +124,8 @@ maybesudo_() {
 
     else
         # run it in a subshell so it won't affect ours.
+        # TODO: run through env anyway for consistency.
+        #       (`maybesudo export` should fail)
         ( "$@"; )
     fi
 

sh/minutemaid

@@ -1,17 +1,19 @@
-#!/usr/bin/env zsh
+#!/usr/bin/env dash
 # crontab usage:
-#* * * * * minutemaid 9 cd repo && git pull # runs every nine minutes
+#* * * * * minutemaid 9 ~/work/do_my_bidding # runs every nine minutes
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 minutemaid() {
-    local offset=0 opt=
-    while getopts 'o:h' opt; do
-        case $opt in
+    local offset=0 name
+    while getopts 'o:h' name; do
+        case $name in
         o)  offset="$OPTARG";;
         ?)  local fd=0
-            [ $opt = h ] && fd=0 || fd=2
-            echo -E "usage: $0 [-o offset] {interval} [{command} [{args...}]]" >&$fd
-            [ $opt = h ] && return 0 || return 1;;
+            [ $name = h ] && fd=1 || fd=2
+            printf "%s\n" "usage: $0 [-o offset] {interval} [{command} [{args...}]]" >&$fd
+            [ $name = h ] && return 0 || return 1;;
         esac
     done
     shift $((OPTIND-1))
@@ -20,13 +22,10 @@ minutemaid() {
     shift
 
     local sec="$(date +%s)"
-    let min=sec/60+offset
-    let mod=min%interval
+    local min="$((sec/60+offset))"
+    local mod="$((min%interval))"
     if [ $# -gt 0 ]; then
-        local cmd="${1}"
-        shift
-
-        [ $mod -eq 0 ] && "$cmd" "$@"
+        [ $mod -ne 0 ] || "$@"
     else
         [ $mod -eq 0 ] && return 0 || return 1
     fi

sh/noccom

@@ -2,6 +2,10 @@
 # the first expression is taken from this FAQ:
 # https://perldoc.perl.org/perlfaq6.html#How-do-I-use-a-regular-expression-to-strip-C-style-comments-from-a-file%3f
 # YES_ZSH
+# YES_BASH
+# YES_DASH
+
+# TODO: what's the minimum version of perl required for this?
 
 noccom() {
     [ -s ~/opt/local/bin/noccom ] || cat > ~/opt/local/bin/noccom <<EOF

sh/note

@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 note() {
     local IFS=" "

sh/now

@@ -1,5 +1,9 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
+
+# dash compatibility is not fully tested, but it's probably okay.
 
 now() {
     [ $# -le 1 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }
@@ -32,8 +36,8 @@ now() {
     M=${M#0*}
     S=${S#0*}
 
-    local ms=
-    let 'ms=(H*60*60+M*60+S)*1000+N/1000000'
+    local ms
+    ms=$(((H*60*60+M*60+S)*1000+N/1000000))
     ms=$(printf '%08i' $ms)
     echo "${F}_${ms}"
 }

sh/pacbm

@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 pacbm() {
     expac -s '%m %n' | awk '

sh/pause

@@ -1,11 +1,13 @@
 #!/usr/bin/env bash
 # YES_ZSH
+# YES_BASH
+# NO_DASH
 
 pause() {
     [ -n "${ZSH_VERSION:-}" ] \
-    && read -sk '?Press any key to continue
-    ' || read -n1 -u 1 -sp 'Press any key to continue
-    '
+      && read -sk '?Press any key to continue
+'     || read -n1 -u 1 -sp 'Press any key to continue
+'
 }
 
 [ "${SOURCING:-0}" -gt 0 ] || pause "$@"

sh/pegg

@@ -1,5 +1,9 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
+
+# TODO: source pippy here? this may affect dash compatibility.
 
 pegg() {
     [ $# -ge 2 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }

sh/pippy

@@ -1,4 +1,4 @@
-#!/usr/bin/env
+#!/usr/bin/env sh
 # YES_ZSH
 
 #. ~/sh/maybesudo

sh/pre

@@ -1,5 +1,7 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 pre() {
     if [ -n "${ZSH_VERSION:-}" ]; then

sh/psbm

@@ -1,7 +1,10 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 psbm() {
+    [ -z "$MSYSTEM" ] || { printf "%s\n" "$0: unsupported on MSYS2" >&2; return 1; }
     ps axco rss,pid,command | awk '
     NR>1&&$1>0{t+=$1;printf("%8.2fM %7d %s\n",$1/1024,$2,$3)}
     END{printf("%8.2fM\n",t/1024)}

sh/randir

@@ -1,8 +1,10 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 randir() {
-    find -maxdepth 1 -type d \( -path '/root' -prune -o -print \) | tail -n+2 | shuf | head -1
+    find -maxdepth 1 -type d \( -path '/root' -prune -o -print \) | tail -n+2 | shuf | head -n1
 }
 
 [ "${SOURCING:-0}" -gt 0 ] || randir "$@"

sh/refresh

@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 refresh() {
     hash -r

sh/sc

@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 
-. ~/.ea # FIXME: don't do this? somehow?
+SOURCING=$((SOURCING+1))
+. ~/sh/ea # FIXME: don't do this? somehow?
+SOURCING=$((SOURCING-1))
 
 sc_shorten() {
     REPLY="${1:2:2}${1:5:2}${1:8:2}${1:11:12}"
@@ -59,4 +61,4 @@ sc() {
     return 0
 }
 
-sc "$@"
+[ "${SOURCING:-0}" -gt 0 ] || sc "$@"

sh/scramble

@@ -1,7 +1,10 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 scramble() {
+    [ $# -eq 0 ] || { printf "%s\n" "$0: does not take arguments" >&2; return 1; }
     local eggs='s/@\(\w\)\(\w\)\(\w\)/@\3\1@\2/g'
     sed \
     -e 's/\b\w/&@/g' \

sh/scropt

@@ -1,12 +1,16 @@
 #!/usr/bin/env bash
 # YES_ZSH
 
+#SOURCING=$((SOURCING+1))
+#. ~/sh/now # FIXME: don't do this?
+#SOURCING=$((SOURCING-1))
+
 scropt() {
-    local now=
-    which ~/sh/now 2>/dev/null >/dev/null && now=$(~/sh/now) || now=$(date +%F_%T)
+    local now=$(now)
+    [ $? -eq 0 ] || return $?
     local fn="$HOME/play/$now.png"
     scrot "$fn" -e "optipng -quiet \$f" "$@"
-    echo "$fn"
+    [ $? -eq 0 ] && echo "$fn" || return $?
 }
 
 [ "${SOURCING:-0}" -gt 0 ] || scropt "$@"

sh/similar

@@ -1,7 +1,10 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 similar() {
+    [ $# -eq 0 ] || { printf "%s\n" "$0: does not take arguments" >&2; return 1; }
     awk '
     {
         i=0

sh/slit

@@ -1,9 +1,14 @@
-#!/usr/bin/env zsh
-# from https://github.com/sorin-ionescu/prezto/
+#!/usr/bin/env dash
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 slit() {
-    awk "{ print ${(j:,:):-\$${^@}} }"
+    [ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
+    awk "{ print $(printf ',$%s' $@ | cut -b2-) }"
+
+    # via: https://github.com/sorin-ionescu/prezto/
+    #awk "{ print ${(j:,:):-\$${^@}} }"
 }
 
 [ "${SOURCING:-0}" -gt 0 ] || slit "$@"

sh/slitt

@@ -1,10 +1,17 @@
-#!/usr/bin/env zsh
-# via: https://github.com/sorin-ionescu/prezto/
-# this version uses tabs for input/output field separators.
+#!/usr/bin/env dash
+# this version of slit uses tabs for input/output field separators.
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 slitt() {
-    awk "BEGIN { FS=\"\\t\"; OFS=\"\\t\" } { print ${(j:,:):-\$${^@}} }"
+    [ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
+    #echo "$@" | awk '{for(i=1;i<NF;i++)printf"$%s,",$(i);print"$"$NF}'
+    local fields="$(printf ',$%s' $@ | cut -b2-)"
+    awk "BEGIN { FS=\"\\t\"; OFS=\"\\t\" } { print $fields }"
+
+    # via: https://github.com/sorin-ionescu/prezto/
+    #awk "BEGIN { FS=\"\\t\"; OFS=\"\\t\" } { print ${(j:,:):-\$${^@}} }"
 }
 
 [ "${SOURCING:-0}" -gt 0 ] || slitt "$@"

sh/sum

@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 sum() {
     local sum=0

sh/sv

@@ -1,7 +1,10 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 sv() {
+    [ $# -le 1 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }
     awk "-F${1:- }" '
     NF>1{f[$1]=substr($0,length($1)+1+length(FS))}END{for(k in f)print k FS f[k]}
     '

sh/tpad

@@ -1,10 +1,11 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 tpad() {
-    while [ $# -gt 0 ]; do
-        gm convert -bordercolor "#000000FF" -border 1x1 "$1" "${1/.png/}.tt.png";
-        shift
+    for f; do
+        gm convert -bordercolor "#000000FF" -border 1x1 "$f" "${f%.png}.tt.png"
     done
 }
 

sh/trash

@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 trash() {
     [ $# -le 1 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }

sh/trunc

@@ -1,7 +1,10 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 trunc() {
+    [ $# -le 1 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }
     COLUMNS=${COLUMNS:-$(tput cols)}
     awk -vL=${1:-$COLUMNS} '{e=length>L?"…":"";print substr($0,0,L-(e?1:0)) e}'
 }

sh/unscreen

@@ -1,5 +1,7 @@
 #!/usr/bin/env zsh
 # YES_ZSH
+# NO_BASH
+# NO_DASH
 
 unscreen() {
     local pids="$(screen -ls | fgrep "$1" | cut -d. -f1)"

sh/wat

@@ -1,5 +1,7 @@
 #!/usr/bin/env zsh
 # YES_ZSH
+# NO_BASH
+# NO_DASH
 
 # wat - a better and recursive which/whence
 # via: https://leahneukirchen.org/dotfiles/tools.html

sh/wipe

@@ -1,14 +1,20 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 # YES_ZSH
+# YES_BASH
+# YES_DASH
 
 wipe() {
     # TODO: rename because wipe(1) already exists.
     [ $# -le 0 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }
     clear
     clear # twice because mintty is weird
-    echo "\033[30m\033[107m"
-    printf "*%.0s" {1..$COLUMNS}
-    echo "\033[0m\n"
+    echo $'\033[30m\033[107m' | tr -d '$'
+    if [ -n "${ZSH_VERSION:-}" ]; then
+        printf '*%.0s' {1..$COLUMNS}
+    else
+        tput cols | awk '{for(i=0;i<$0;i++)printf "*"}'
+    fi
+    echo $'\033[0m\n' | tr -d '$'
 }
 
 [ "${SOURCING:-0}" -gt 0 ] || wipe "$@"