Add a basic script to check for release sanity

scripts/devel/check-release.lua

@@ -0,0 +1,59 @@
+-- basic check for release readiness
+--[[=begin
+devel/check-release
+===================
+Basic checks for release readiness
+=end]]
+
+ok = true
+function err(s)
+	dfhack.printerr(s)
+	ok = false
+end
+function warn(s)
+	dfhack.color(COLOR_YELLOW)
+	dfhack.print(s .. '\n')
+	dfhack.color(nil)
+end
+
+dfhack_ver = dfhack.getDFHackVersion()
+git_desc = dfhack.getGitDescription()
+git_commit = dfhack.getGitCommit()
+if not dfhack.isRelease() then
+	err('This build is not tagged as a release')
+	print[[
+This is probably due to missing git tags.
+Try running `git fetch origin --tags` in the DFHack source tree.
+]]
+end
+
+expected_git_desc = ('%s-0-g%s'):format(dfhack_ver, git_commit:sub(1, 7))
+if git_desc:sub(1, #expected_git_desc) ~= expected_git_desc then
+	err(([[Bad git description:
+Expected %s, got %s]]):format(expected_git_desc, git_desc))
+	print[[
+Ensure that the DFHack source tree is up-to-date (`git pull`) and CMake is
+installing DFHack to this DF folder.
+]]
+end
+
+if not dfhack.gitXmlMatch() then
+	err('library/xml submodule commit does not match tracked commit\n' ..
+		('Expected %s, got %s'):format(
+			dfhack.getGitXmlCommit():sub(1, 7),
+			dfhack.getGitXmlExpectedCommit():sub(1, 7)
+		))
+	print('Try running `git submodule update` in the DFHack source tree.')
+end
+
+if dfhack.isPrerelease() then
+	warn('This build is marked as a prerelease.')
+	print('If this is not intentional, be sure your DFHack tree is up-to-date\n' ..
+		'(`git pull`) and try again.')
+end
+
+if not ok then
+	err('This build is not release-ready!')
+else
+	print('Release checks succeeded')
+end