Fixed the --version command when installed from source (#347)

* Fixed the --version command when installed from source (#344)

The command only worked when running it inside the git repository.

Now, it works from everywhere, and the version is constructed using
the latest git tag and the SHA of the latest commit, which may help
with further debugging in future issues.

* Improving version output.

Renaming version_config to setuptools_git_versioning to be compliant with new plugin version.

Formatted the version when a git hash is present for a better readability.

The version is set in the setup.py file. This will be used for the tar.gz releases.
Snap version is also retrieved from setup.py too, so we avoid code repetition.

auto_cpufreq/core.py

@@ -12,6 +12,7 @@ import time
 import click
 import warnings
 import configparser
+import pkg_resources
 from math import isclose
 from pathlib import Path
 from shutil import which
@@ -111,7 +112,7 @@ except PermissionError:
 # display running version of auto-cpufreq
 def app_version():
 
-    print("auto-cpufreq version:")
+    print("auto-cpufreq version: ", end="")
 
     # snap package
     if os.getenv("PKG_MARKER") == "SNAP":
@@ -120,23 +121,27 @@ def app_version():
     elif dist_name in ["arch", "manjaro", "garuda"]:
         aur_pkg_check = call("pacman -Qs auto-cpufreq > /dev/null", shell=True)
         if aur_pkg_check == 1:
-            print(
-                "Git commit:",
-                check_output(["git", "describe", "--always"]).strip().decode(),
-            )
+            print(get_formatted_version())
         else:
             print(getoutput("pacman -Qi auto-cpufreq | grep Version"))
     else:
         # source code (auto-cpufreq-installer)
         try:
-            print(
-                "Git commit:",
-                check_output(["git", "describe", "--always"]).strip().decode(),
-            )
+            print(get_formatted_version())
         except Exception as e:
             print(repr(e))
             pass
 
+# return formatted version for a better readability
+def get_formatted_version():
+    literal_version = pkg_resources.require("auto-cpufreq")[0].version
+    splitted_version = literal_version.split("+")
+    formatted_version = splitted_version[0]
+    
+    if len(splitted_version) > 1:
+        formatted_version += " (git: " + splitted_version[1] + ")"
+
+    return formatted_version
 
 def app_res_use():
     p = psutil.Process()

setup.py

@@ -12,10 +12,18 @@ def read(name):
     with open(os.path.join(this, name)) as f:
         return f.read()
 
+# Used for the tar.gz/snap releases
+VERSION = "1.9.0"
 
 setup(
     name="auto-cpufreq",
-    version="1.0",
+    setuptools_git_versioning={
+        "starting_version": VERSION,
+        "template": "{tag}+{sha}",
+        "dev_template": "{tag}+{sha}",
+        "dirty_template": "{tag}+{sha}.post{ccount}.dirty"
+    },
+    setup_requires=["setuptools-git-versioning"],
     description="Automatic CPU speed & power optimizer for Linux",
     long_description=readme,
     author="Adnan Hodzic",

snap/snapcraft.yaml

@@ -1,6 +1,5 @@
 name: auto-cpufreq
 base: core20
-version: '1.9.1'
 summary: Automatic CPU speed & power optimizer for Linux
 description: |
   Automatic CPU speed & power optimizer for Linux based on active
@@ -11,6 +10,7 @@ description: |
 license: LGPL-3.0
 grade: stable
 confinement: strict
+adopt-info: auto-cpufreq
 
 compression: lzo
 
@@ -27,6 +27,9 @@ parts:
        - coreutils
        - dmidecode
     source: .
+    override-pull: |
+      snapcraftctl pull
+      snapcraftctl set-version `grep ^VERSION $SNAPCRAFT_PART_SRC/setup.py | sed 's/.*"\(.*\)"/\1/'`
 
   deploy-scripts:
     plugin: dump