From f7d4ad2f7dd6bf64d13896d3409fde9b5437e374 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Mon, 26 Aug 2024 12:51:14 +0200
Subject: Added installation targets

---
 Makefile                 | 22 +++++++++++++++++++++-
 headers.lua              | 11 ++---------
 headers/db.lua           | 25 +++++++++++++++++++++++++
 headers/default_path.lua |  1 +
 4 files changed, 49 insertions(+), 10 deletions(-)
 create mode 100644 headers/db.lua
 create mode 100644 headers/default_path.lua

diff --git a/Makefile b/Makefile
index 28eceec..01478ad 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,26 @@
+LUA_VERSION=5.4
+DESTDIR=
+PREFIX=/usr/local
+PREFIX_EXEC=$(PREFIX)
+BINDIR=$(PREFIX_EXEC)/bin
+DATADIR=$(PREFIX)/share
+LUA_LMOD=$(DATADIR)/lua/$(LUA_VERSION)
+HEADERS_DB=$(DATADIR)/headers
+
 all: test
 
 test:
 	busted
 
-.PHONY: all test
+install:
+	install -m755 -DT headers.lua $(DESTDIR)$(BINDIR)/headers
+	install -m644 -Dt $(DESTDIR)$(LUA_LMOD)/headers headers/*.lua
+	install -m644 -Dt $(DESTDIR)$(HEADERS_DB) db/*.lua
+	sed -i 's|db/|$(HEADERS_DB)/|' $(DESTDIR)$(LUA_LMOD)/headers/default_path.lua
+
+uninstall:
+	rm -f $(DESTDIR)$(BINDIR)/headers
+	rm -rf $(DESTDIR)$(LUA_LMOD)/headers
+	rm -rf $(DESTDIR)$(HEADERS_DB)
+
+.PHONY: all test install uninstall
diff --git a/headers.lua b/headers.lua
index 290aca3..dc2c333 100755
--- a/headers.lua
+++ b/headers.lua
@@ -1,18 +1,11 @@
 #!/usr/bin/env lua
 local args = require "pl.lapp" [[
 Prints list of headers from a standard or available standards
-	-d  (string default 'db/')  Directory where definitions are placed
+	-d  (optional string)  Directory where definitions are placed
 	<selection...>  (optional string)  Standard to display the headers for
 ]]
 local dir = require "pl.dir"
-local parser = require "headers.parser".new()
-local definitions = dir.getfiles(args.d, "*.lua")
-for _, filename in pairs(definitions) do
-	local handle = io.open(filename)
-	local data = handle:read("a")
-	handle:close()
-	parser:parse(data)
-end
+local parser = require "headers.db".parse_all(args.d)
 if #args.selection > 0 then
 	local headers = parser:get_headers(args.selection)
 	if not headers then
diff --git a/headers/db.lua b/headers/db.lua
new file mode 100644
index 0000000..1404608
--- /dev/null
+++ b/headers/db.lua
@@ -0,0 +1,25 @@
+local dir = require "pl.dir"
+local default = require "headers.default_path"
+local parser = require "headers.parser"
+local db = {}
+
+
+function db.path (override)
+	return override or os.getenv "HEADERS_DB_PATH" or default
+end
+
+
+function db.parse_all (override)
+	local parser = parser.new()
+	local definitions = dir.getfiles(db.path(override), "*.lua")  -- Will grab anything and error out in +5
+	for _, filename in pairs(definitions) do
+		local handle = io.open(filename)
+		local data = handle:read"a"
+		handle:close()
+		parser:parse(data)
+	end
+	return parser
+end
+
+
+return db
diff --git a/headers/default_path.lua b/headers/default_path.lua
new file mode 100644
index 0000000..bb1cb8a
--- /dev/null
+++ b/headers/default_path.lua
@@ -0,0 +1 @@
+return "db/"
-- 
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