Add build infrastructure to build in Postgres environment.

Add a Makefile that works with the PGXS infrastructure.

Add err.h and err.c, taken from FreeBSD 11 and cut down to just
the minimum support needed by indent.

Add README.pg_bsd_indent with simple build instructions,
and .gitignore.

5 files changed, 174 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4c5d8dc
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,10 @@
+# Global excludes across all subdirectories
+*.o
+*.obj
+*.exe
+
+# Local excludes in root directory
+/pg_bsd_indent
+/*.out
+/*.list
+/tests.diff
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..e8768c8
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,31 @@
+#-------------------------------------------------------------------------
+#
+# Makefile for pg_bsd_indent
+#
+# Copyright (c) 2017, PostgreSQL Global Development Group
+#
+#-------------------------------------------------------------------------
+
+PGFILEDESC = "pg_bsd_indent - indent C code nicely"
+PGAPPICON = win32
+
+PROGRAM = pg_bsd_indent
+OBJS	= args.o err.o indent.o io.o lexi.o parse.o pr_comment.o $(WIN32RES)
+
+# clean junk left behind by "make check"
+EXTRA_CLEAN = *.out *.list tests.diff
+
+PG_CONFIG = pg_config
+PGXS := $(shell $(PG_CONFIG) --pgxs)
+include $(PGXS)
+
+check: $(PROGRAM)
+	rm -f tests.diff
+	cp $(srcdir)/tests/*.list .
+	for testsrc in $(srcdir)/tests/*.0; do \
+		test=`basename "$$testsrc" .0`; \
+		./$(PROGRAM) $$testsrc $$test.out -P$(srcdir)/tests/$$test.pro || echo FAILED >>$$test.out; \
+		diff -u $$testsrc.stdout $$test.out >>tests.diff 2>&1 || true; \
+	done
+	@cat tests.diff
+	@test '!' -s tests.diff
diff --git a/README.pg_bsd_indent b/README.pg_bsd_indent
new file mode 100644
index 0000000..747130d
--- /dev/null
+++ b/README.pg_bsd_indent
@@ -0,0 +1,21 @@
+pg_bsd_indent
+
+This is a lightly modified version of the "indent" program maintained
+by the FreeBSD project.  The modifications are mostly to make it portable
+to non-BSD-ish platforms, though we do have one formatting switch we
+couldn't convince upstream to take.
+
+To build it, you will need a Postgres installation, version 9.5 or newer.
+(Once built, the program doesn't depend on that installation.)
+
+To build, just say "make"; or if pg_config from your Postgres installation
+isn't in your PATH, say
+	make PG_CONFIG=path/to/pg_config
+Optionally, run "make check" for some simple sanity checks.
+
+To install, copy pg_bsd_indent to somewhere in your usual PATH.
+(If you say "make install", it will try to put it in your Postgres
+installation directory, which is most likely not what you want for
+long-term use.)
+
+TODO: add build support and instructions for Windows
diff --git a/err.c b/err.c
new file mode 100644
index 0000000..8073193
--- /dev/null
+++ b/err.c
@@ -0,0 +1,67 @@
+/*-
+ * Copyright (c) 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+/*
+ * This is cut down to just the minimum that we need to build indent.
+ */
+#include "c.h"
+
+#include <err.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void
+err(int eval, const char *fmt, ...)
+{
+	int code = errno;
+	va_list ap;
+	va_start(ap, fmt);
+	if (fmt != NULL) {
+		vfprintf(stderr, fmt, ap);
+		fprintf(stderr, ": ");
+	}
+	fprintf(stderr, "%s\n", strerror(code));
+	va_end(ap);
+	exit(eval);
+}
+
+void
+errx(int eval, const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	if (fmt != NULL)
+		vfprintf(stderr, fmt, ap);
+	fprintf(stderr, "\n");
+	va_end(ap);
+	exit(eval);
+}
diff --git a/err.h b/err.h
new file mode 100644
index 0000000..a3e8f97
--- /dev/null
+++ b/err.h
@@ -0,0 +1,45 @@
+/*-
+ * Copyright (c) 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ *	@(#)err.h	8.1 (Berkeley) 6/2/93
+ * $FreeBSD: stable/11/include/err.h 203964 2010-02-16 19:39:50Z imp $
+ */
+
+#ifndef _ERR_H_
+#define	_ERR_H_
+
+/*
+ * This is cut down to just the minimum that we need to build indent.
+ */
+
+void	err(int, const char *, ...)
+  pg_attribute_noreturn() pg_attribute_printf(2, 3);
+void	errx(int, const char *, ...)
+  pg_attribute_noreturn() pg_attribute_printf(2, 3);
+
+#endif /* !_ERR_H_ */