feat: initial commit

LICENSE

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+Copyright (c) 2022 ptrcnull
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# execline-ptrc-extras
+
+> fun execline scripts to try at home
+
+### println
+
+like echo, but chainable
+
+```sh
+println "test"
+echo test1
+```
+
+### eprintln
+
+println but to stderr :)
+
+```sh
+eprintln "test"
+echo test1
+```
+
+### tdefine
+
+ternary define: `$1 = if ($4) { $2 } { $3 } cmd...`
+
+```sh
+backtick -E uid { id -u }
+tdefine sucmd "doas" "exec" { s6-test $uid != 0 }
+
+$sucmd s6-linux-init-shutdown
+```

eprintln

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+#!/bin/execlineb
+
+foreground { fdmove -c 1 2 importas -ui msg 1 s6-echo $msg }
+shift
+elgetpositionals
+$@

println

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+#!/bin/execlineb
+
+foreground { importas -ui msg 1 s6-echo $msg }
+shift
+elgetpositionals
+$@

tdefine

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+#!/bin/execlineb
+
+elgetpositionals
+backtick result {
+	ifelse { runblock -n 3 1 } {
+		echo "$2"
+	}
+	echo "$3"
+}
+runblock -n 3 -r 1
+importas -ui "$1" result
+unexport result