Add the code of the plugin

.gitattributes

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+.git* export-ignore
+README* export-ignore
+LICENSE* export-ignore
+mk* export-ignore

.gitignore

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+*~
+*.zip

README.md

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-# tablepress-pods
+## tablepress-pods
+
+##### Abstract
 
 Create Tablepress tables which summarize and display information from Pods
+
+##### Description
+
+This project is an extension to the TablePress plug-in (see https://tablepress.org/) for WordPress (https://wordpress.org/). It is not useful without the TablePress plug-in. This project is not part of TablePress, but designed to work with it and extend its capabilities.
+
+This project also assumes that you have installed the Pods plug-in (see https://pods.io/) in your WordPress installation. It is also not useful without the Pods plug-in.
+
+The tablepress-pods extension allows you to extract and display in Tablepress tables information from the content in Pods custom post types and taxonomies. If you use Pods and would like to produce tables from the information you've stored in them, this extension is potentially very useful.
+
+##### Installation
+
+Download a release from https://code.studioinfinity.org/glen/tablepress-pods/releases (as a zip file) and install and activate in your WordPress site like any other extension in zip format. (Namely, from your Dashboard, select Plugins, click on add new, and then browse to the downloaded zip file on your disk.)
+
+##### Usage
+
+This extension operates by adding additional parameters to the [table id=NN /] shortcode. For a list of the provided parameters and their meanings, see the source file tablepress-pods.php. For it to be useful, you then need to go to the
+table definition (in the Tablepress tabs from the Dashboard) of the corresponding table and use Pods "magic tags" within that table.
+
+Here's a brief example:
+
+`[table id=2 pod_name="problem" /]`
+
+together with a definition of table 2 in Tablepress that looks like
+
+|       | A           | B                                     |
+| ----: | :---------- | ------------------------------------- |
+| **1** | Number      | Title                                 |
+| **2** | `{@number}` | `<a href="{@permalink}">{@title}</a>` |
+
+will produce a two-column table that lists the number and title of each "problem" in the Pod, with the title being a link to the problem.
+
+##### Building
+
+To produce an installable zip file, change directories into a git clone of this repository, and simply execute the command in mkplugin.sh (for example, via `bash mkplugin.sh`). Note that currently you must update the version number in the mkplugin.sh command.

mkplugin.sh

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+git archive HEAD --prefix=tablepress-pods/ --format=zip -o tablepress-pods-0.2.zip

tablepress-pods.php

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+<?php
+/*
+Plugin Name: TablePress Extension: Pods tables
+Plugin URI: https://code.studioinfinity.org/glen/tablepress-pods
+Description: Custom Extension for TablePress to incorporate Pods information in tables
+Version: 0.2
+Author: Glen Whitney
+Author URI: http ://studioinfinity.org/
+*/
+
+/* Copyright (C) 2018-2019 Glen Whitney
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
+Street, Fifth Floor, Boston, MA 02110-1301 , USA.
+
+*/
+
+/*
+ * Usage and possible parameters:
+ * [table id=1 pod_name="mypod" pod_where="t.myfield = 'important'" /]
+ *
+ * Each row of the table which contains a Pods "magic tag" anywhere is expanded
+ * into one row for each of the pod records returned by 
+ * pods(<pod_name>)->find(<pod_where>), with all of the magic tags in the row
+ * expanded for the corresponding record.
+ *
+ * The expansion can be controlled by the following "pseudo-shortcodes" which
+ * must occur at the beginning of the first column of the row (you may want to
+ * dedicate a hidden column just for this purpose if you are making use of these)
+ *    [once] -- this row expands only into a single row (corresponding to the 
+ *              first record returned by the find() call), with magic
+ *              tags expanded
+ * [literal] -- do not expand this row, except for removing the [literal] 
+ *              designation, even though it contains magic tags; hence, the 
+ *              magic tags will appear in the result.
+ *
+ * [table id=1 pod_name="mypod" pod_dump=true pod_where="t.myfield = 3" /]
+ *
+ * *Ignores* the contents of the table altogether, and replaces it with a
+ * simple dump of the ID, date, title, author, permalink, and all custom
+ * Pods fields for each record in a Pods custom post type. Note that the
+ * taxonomies, if any, of the post type will not be shown. Useful mainly for
+ * seeing what is present in your Pod; for any presentation tables you will
+ * most likely want to use the first form.
+ * 
+ */
+
+add_filter( 'tablepress_shortcode_table_default_shortcode_atts',
+            'playground_add_shortcode_parameter_pods' );
+add_filter( 'tablepress_table_raw_render_data', 'playground_expand_pod', 10, 2 );
+
+function playground_add_shortcode_parameter_pods( $default_atts ) {
+	$default_atts['pod_name'] = '';
+    $default_atts['pod_dump'] = '';
+    $default_atts['pod_where'] = '';
+	return $default_atts;
+}
+
+function playground_expand_pod( $table, $render_options) {
+	if (empty($render_options['pod_name'])) return $table;
+    $pod_params = array('limit'=>-1);
+    if (!empty($render_options['pod_where'])) {
+        $pod_params['where'] = $render_options['pod_where'];
+    }
+	$pod = pods($render_options['pod_name'], $pod_params);
+	$ndata = array();
+    $rvis = array();
+    $cvis = array();
+    if (empty($render_options['pod_dump'])) {
+        # Standard case: expand rows with magic tags into multiple rows,
+        # one for each record in $pod, controlled by the pseudo-shortcodes
+        $cvis = $table['visibility']['columns'];
+        $orig_rvis = $table['visibility']['rows'];
+        foreach ($table['data'] as $row_idx => $row) {
+            # First, check for the [literal] code since nothing much to do then
+            if (0 === strpos($row[0], '[literal]')) {
+                $row[0] = substr($row[0], 9);
+                $ndata[] = $row;
+                $rvis[] = $orig_rvis[$row_idx];
+                continue;
+            }
+            # Similarly, if no magic tags, just copy the row.
+            $wholerow = implode('',$row);
+            if (!preg_match('/{@.*}/', $wholerow)) {
+                $ndata[] = $row;
+                $rvis[] = $orig_rvis[$row_idx];
+                continue;
+            }
+            # OK, we need to expand magic tags in the row. First check for
+            # the [once] pseudo-shortcode:
+            $one_timer = FALSE;
+            if (0 === strpos($row[0], '[once]')) {
+                $row[0] = substr($row[0], 6);
+                $one_timer = TRUE;
+            }
+            # Here's the expansion loop
+            $pod->reset();
+            while ($pod->fetch()) {
+                $ndata[] = array_map(function($c) use($pod) {
+                                         return $pod->do_magic_tags($c);
+                                     }, $row);
+                $rvis[] = $orig_rvis[$row_idx];
+                if ($one_timer) { break; }
+            }
+        } # for each row of the original table
+    } else { # pod_dump is specified.
+        $flds = $pod->fields();
+        $hrow = array('ID','Date','Title','Author','Permalink');
+        $cvis = array(TRUE, TRUE, TRUE, TRUE, TRUE);
+        $frow = array();
+        foreach ($flds as $fkey => $finfo) {
+            $hrow[] = $finfo['label'];
+            $cvis[] = TRUE;
+            $frow[] = $fkey;
+        }
+        $ndata[] = $hrow;
+        $rvis = array(TRUE);
+        while ($pod->fetch()) {
+            $nrow = array();
+            $nrow[] = $pod->field('id');
+            $nrow[] = $pod->field('post_date');
+            $nrow[] = $pod->field('title');
+            $nrow[] = get_the_author_meta('display_name', $pod->field('author'));
+            $nrow[] = $pod->field('permalink');
+            foreach ($frow as $field_slug) {
+                $nrow[] = $pod->display($field_slug);
+            }
+            $ndata[] = $nrow;
+            $rvis[] = TRUE;
+        }
+    } # do a pod dump
+    # OK, install the new table information
+	$table['data'] = $ndata;
+	$table['visibility']['rows'] = $rvis;
+	$table['visibility']['columns'] = $cvis;
+	return $table;
+}