From 7ca01e66c0d1c0e4406f47b694e843e373e092a3 Mon Sep 17 00:00:00 2001
From: Bart Noordervliet <bart@mmvi.nl>
Date: Sun, 24 Apr 2022 22:29:57 +0200
Subject: [PATCH] Show version number when run without arguments

Takes the version from `git describe --tags`
---
 Cargo.lock  | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml  |  1 +
 src/main.rs |  6 ++++-
 3 files changed, 70 insertions(+), 1 deletion(-)

diff --git a/Cargo.lock b/Cargo.lock
index 41ec5a0..51351bc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -23,6 +23,28 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95765f67b4b18863968b4a1bd5bb576f732b29a4a28c7cd84c09fa3e2875f33c"
 
+[[package]]
+name = "git-version"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6b0decc02f4636b9ccad390dcbe77b722a77efedfa393caf8379a51d5c61899"
+dependencies = [
+ "git-version-macro",
+ "proc-macro-hack",
+]
+
+[[package]]
+name = "git-version-macro"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fe69f1cbdb6e28af2bac214e943b99ce8a0a06b447d15d3e61161b0423139f3f"
+dependencies = [
+ "proc-macro-hack",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -41,6 +63,21 @@ version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"
 
+[[package]]
+name = "proc-macro-hack"
+version = "0.5.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec757218438d5fda206afc041538b2f6d889286160d649a86a24d37e1235afd1"
+dependencies = [
+ "unicode-xid",
+]
+
 [[package]]
 name = "quick-xml"
 version = "0.22.0"
@@ -50,6 +87,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "quote"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1feb54ed693b93a84e14094943b84b7c4eae204c512b7ccb95ab0c66d278ad1"
+dependencies = [
+ "proc-macro2",
+]
+
 [[package]]
 name = "regex"
 version = "1.5.4"
@@ -67,12 +113,30 @@ version = "0.6.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
 
+[[package]]
+name = "syn"
+version = "1.0.91"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b683b2b825c8eef438b77c36a06dc262294da3d5a5813fac20da149241dcd44d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
+
 [[package]]
 name = "xml-to-postgres"
 version = "1.2.0"
 dependencies = [
  "cow-utils",
  "fast-float",
+ "git-version",
  "lazy_static",
  "quick-xml",
  "regex",
diff --git a/Cargo.toml b/Cargo.toml
index 0d8cc5d..1247a29 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,3 +13,4 @@ regex = "1"
 lazy_static = "1"
 cow-utils = "0.1"
 fast-float = "0.2"
+git-version = "0.3"
diff --git a/src/main.rs b/src/main.rs
index fa51beb..5c144d7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,6 +13,7 @@ use yaml_rust::yaml::Yaml;
 use regex::Regex;
 use lazy_static::lazy_static;
 use cow_utils::CowUtils;
+use git_version::git_describe;
 
 macro_rules! fatalerr {
   () => ({
@@ -470,7 +471,10 @@ fn main() {
   else if args.len() == 3 {
     bufread = Box::new(BufReader::new(File::open(&args[2]).unwrap_or_else(|err| fatalerr!("Error: failed to open input file '{}': {}", args[2], err))));
   }
-  else { fatalerr!("Usage: {} <configfile> [xmlfile]", args[0]); }
+  else {
+    eprintln!("xml-to-postgres {}", git_describe!("--tags"));
+    fatalerr!("Usage: {} <configfile> [xmlfile]", args[0]);
+  }
 
   let config = {
     let mut config_str = String::new();