Obtain extension version from Cargo.toml (pgcentralfoundation#345)

This change allows the version to flow from Cargo.toml into the control
file. To enable this behavior default_version in the control file must
be set to '@CARGO_VERSION@'.

Fixes pgcentralfoundation#344

cargo-pgx/Cargo.toml

@@ -15,6 +15,7 @@ exclude = [ "*.png" ]
 
 
 [dependencies]
+cargo_metadata = "0.14.1"
 clap = { version = "2.34.0", features = [ "yaml" ] }
 colored = "2.0.0"
 env_proxy = "0.4.1"

cargo-pgx/src/commands/install.rs

@@ -2,6 +2,7 @@
 // governed by the MIT license that can be found in the LICENSE file.
 
 use crate::commands::get::{find_control_file, get_property};
+use cargo_metadata::MetadataCommand;
 use colored::Colorize;
 use pgx_utils::pg_config::PgConfig;
 use pgx_utils::{exit_with_error, get_target_dir, handle_result};
@@ -243,7 +244,16 @@ pub(crate) fn find_library_file(extname: &str, is_release: bool) -> PathBuf {
 
 pub(crate) fn get_version() -> String {
     match get_property("default_version") {
-        Some(v) => v,
+        Some(v) => {
+            if v == "@CARGO_VERSION@" {
+                let metadata = MetadataCommand::new()
+                    .exec()
+                    .expect("failed to parse Cargo.toml");
+                metadata.root_package().unwrap().version.to_string()
+            } else {
+                v
+            }
+        },
         None => exit_with_error!("cannot determine extension version number.  Is the `default_version` property declared in the control file?"),
     }
 }
@@ -285,7 +295,7 @@ fn filter_contents(mut input: String) -> String {
         input = input.replace("@GIT_HASH@", &get_git_hash());
     }
 
-    input = input.replace("@DEFAULT_VERSION@", &get_version());
+    input = input.replace("@CARGO_VERSION@", &get_version());
 
     input
 }

cargo-pgx/src/templates/control

@@ -1,5 +1,5 @@
 comment = '{name}:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/{name}'
 relocatable = false
 superuser = false

nix/templates/default/pgx_demo.control

@@ -1,5 +1,5 @@
 comment = 'pgx_demo:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/pgx_demo'
 relocatable = false
 superuser = false

pgx-examples/aggregate/aggregate.control

@@ -1,5 +1,5 @@
 comment = 'aggregate:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/aggregate'
 relocatable = false
 superuser = false

pgx-examples/arrays/arrays.control

@@ -1,5 +1,5 @@
 comment = 'arrays:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/arrays'
 relocatable = false
 superuser = false

pgx-examples/bad_ideas/bad_ideas.control

@@ -1,5 +1,5 @@
 comment = 'bad_ideas:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/bad_ideas'
 relocatable = false
 superuser = false

pgx-examples/bgworker/bgworker.control

@@ -1,5 +1,5 @@
 comment = 'bgworker:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/bgworker'
 relocatable = false
 superuser = false

pgx-examples/bytea/bytea.control

@@ -1,5 +1,5 @@
 comment = 'bytea:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/bytea'
 relocatable = false
 superuser = false

pgx-examples/custom_sql/custom_sql.control

@@ -1,5 +1,5 @@
 comment = 'custom_sql:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/custom_sql'
 relocatable = false
 superuser = false

pgx-examples/custom_types/custom_types.control

@@ -1,5 +1,5 @@
 comment = 'custom_types:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/custom_types'
 relocatable = false
 superuser = false

pgx-examples/errors/errors.control

@@ -1,5 +1,5 @@
 comment = 'errors:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/errors'
 relocatable = false
 superuser = false

pgx-examples/operators/operators.control

@@ -1,5 +1,5 @@
 comment = 'operators:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/operators'
 relocatable = false
 superuser = false

pgx-examples/schemas/schemas.control

@@ -1,5 +1,5 @@
 comment = 'schemas:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/schemas'
 relocatable = false
 superuser = true    # b/c this extension creates objects in "pg_catalog"

pgx-examples/shmem/shmem.control

@@ -1,5 +1,5 @@
 comment = 'shmem:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/shmem'
 relocatable = false
 superuser = false

pgx-examples/spi/spi.control

@@ -1,5 +1,5 @@
 comment = 'spi:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/spi'
 relocatable = false
 superuser = false

pgx-examples/srf/srf.control

@@ -1,5 +1,5 @@
 comment = 'srf:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/srf'
 relocatable = false
 superuser = false

pgx-examples/strings/strings.control

@@ -1,5 +1,5 @@
 comment = 'strings:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/strings'
 relocatable = false
 superuser = false

pgx-examples/triggers/triggers.control

@@ -1,5 +1,5 @@
 comment = 'triggers:  Created by pgx'
-default_version = '1.0'
+default_version = '@CARGO_VERSION@'
 module_pathname = '$libdir/triggers'
 relocatable = false
 superuser = false