Display full commit in the version displayed in the UI #88 (#91)

Signed-off-by: tdruez <tdruez@nexb.com>

Author: tdruez

.VERSION

@@ -0,0 +1 @@
+$Format:%(describe:tags)$

CHANGELOG.rst

@@ -54,6 +54,9 @@ Release notes
 - Fix the logout link of the admin app.
   https://github.com/nexB/dejacode/issues/89
 
+- Display full commit in the version displayed in the UI
+  https://github.com/nexB/dejacode/issues/88
+
 ### Version 5.0.1
 
 - Improve the stability of the "Check for new Package versions" feature.

Dockerfile

@@ -31,6 +31,7 @@ RUN apt-get update \
       libldap2-dev \
       libsasl2-dev \
       libpq5 \
+      git \
       wait-for-it \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

dejacode/__init__.py

@@ -9,9 +9,64 @@
 import os
 import sys
 import warnings
+from contextlib import suppress
+from pathlib import Path
+
+import git
 
 VERSION = "5.1.0-dev"
-__version__ = VERSION
+
+PROJECT_DIR = Path(__file__).resolve().parent
+ROOT_DIR = PROJECT_DIR.parent
+
+
+def get_version(version):
+    """Return the version including the git describe tag when available."""
+    # The codebase is a git clone
+    if git_describe := get_git_describe_from_local_checkout():
+        return git_describe
+
+    # The codebase is an extracted git archive
+    if git_describe := get_git_describe_from_version_file():
+        return git_describe
+
+    return version
+
+
+def get_git_describe_from_local_checkout():
+    """
+    Return the git describe tag from the local checkout.
+    This will only provide a result when the codebase is a git clone.
+    """
+    with suppress(git.GitError):
+        return git.Repo(".").git.describe(tags=True, always=True)
+
+
+def get_git_describe_from_version_file(version_file_location=ROOT_DIR / ".VERSION"):
+    """
+    Return the git describe tag from the ".VERSION" file.
+    This will only provide a result when the codebase is an extracted git archive
+    """
+    try:
+        version = version_file_location.read_text().strip()
+    except (FileNotFoundError, UnicodeDecodeError):
+        return
+
+    if version and version.startswith("v"):
+        return version
+
+
+def extract_short_commit(git_describe):
+    """
+    Extract the short commit hash from a Git describe string while removing
+    any leading "g" character if present.
+    """
+    short_commit = git_describe.split("-")[-1]
+    return short_commit.lstrip("g")
+
+
+__version__ = get_version(VERSION)
+
 
 # Turn off the warnings for the following modules.
 warnings.filterwarnings("ignore", module="cyclonedx")

dje/templates/includes/header.html

@@ -17,7 +17,7 @@
       <a class="dropdown-item" href="https://github.com/nexB/dejacode/releases" target="_blank" rel="noreferrer">{% trans 'Releases' %}</a>
       <a class="dropdown-item" href="https://scancode-licensedb.aboutcode.org/agpl-3.0.html" target="_blank" rel="noreferrer">{% trans 'License' %}</a>
       <div class="dropdown-divider"></div>
-      <h6 class="dropdown-header">DejaCode: v{{ DEJACODE_VERSION }}</h6>
+      <h6 class="dropdown-header">{{ DEJACODE_VERSION }}</h6>
     </div>
   </div>
 {% endblock %}

dje/templates/includes/navbar_header.html

@@ -126,7 +126,7 @@
                 </a>
               {% endif %}
               <div class="dropdown-divider"></div>
-              <div class="dropdown-header">DejaCode: v{{ DEJACODE_VERSION }}</div>
+              <div class="dropdown-header">{{ DEJACODE_VERSION }}</div>
               <div class="dropdown-divider"></div>
               <form id="logout-form" method="post" action="{% url 'logout' %}">
                 {% csrf_token %}

setup.cfg

@@ -164,6 +164,10 @@ install_requires =
     sortedcontainers==2.4.0
     toml==0.10.2
     py-serializable==1.0.3
+    # Git
+    gitpython==3.1.43
+    gitdb==4.0.11
+    smmap==5.0.1
 
 [options.extras_require]
 dev =