meson.build: Bump boulder version to 1.0.2

Add documentation in README for this (because I'll 100% forget >_>) and
ensure that the build itself will spit out a compile-time message with
the parsed version + git ref info for completeness.

As a reminder, boulder 1.0.2 supports the new %cargo_* macro actions.

Signed-off-by: Rune Morling <ermo@serpentos.com>

README.md

@@ -13,6 +13,7 @@ and development headers, including (in fedora package names format):
 - `libzstd` and `libzstd-devel`
 - `xxhash-libs` and `xxhash-devel`
 - `moss` (build prior to building `boulder`)
+- `moss-container` (build after `moss` and prior to boulding `boulder`)
 
 ### Cloning
 
@@ -27,3 +28,18 @@ Remember to add the `--recurse-submodule` argument (for serpent-style commit hoo
 ### Running
 
     sudo boulder build stone.yml
+
+### Bumping the version showed in `boulder version`
+
+Edit the `meson.build` project `version` property:
+
+    project(
+        'boulder',
+        ['d'],
+        version: '1.0.1', # <- this
+        license: [
+                'Zlib',
+        ]
+    )
+
+This will in turn get picked up by `source/boulder/environment.d`

meson.build

@@ -1,7 +1,7 @@
 project(
 	'boulder',
 	['d'],
-	version: '1.0.1',
+	version: '1.0.2',
 	license: [
 		'Zlib',
 	]

source/boulder/environment.d

@@ -36,6 +36,8 @@ string fullVersion()
 {
     immutable git = GIT_HASH == "" ? "" : format!" (%s)"(GIT_HASH);
 
+    pragma(msg, format!"--\n-- found (VERSION, GIT_HASH): (%s, %s)\n--"(VERSION, GIT_HASH));
+
     return format!"%s%s"(VERSION, git);
 }