version based on the git repository

This commit remove the need to update the brand for GIT_URL and GIT_BRANCH:
there are read from the git repository.

It is possible to call python -m searx.version freeze to freeze the current version.
Useful when the code is installed outside git (distro package, docker, etc...)

utils/brand.env

@@ -1,5 +1,5 @@
-export GIT_URL='https://github.com/searxng/searxng'
-export GIT_BRANCH='master'
 export SEARX_URL=''
 export SEARX_PORT='8888'
 export SEARX_BIND_ADDRESS='127.0.0.1'
+export GIT_URL='https://github.com/searxng/searxng'
+export GIT_BRANCH='master'

utils/build_env.py

@@ -7,6 +7,8 @@ import sys
 import os
 from os.path import realpath, dirname, join, sep, abspath
 
+from searx.version import GIT_URL, GIT_BRANCH
+
 repo_root = realpath(dirname(realpath(__file__)) + sep + '..')
 sys.path.insert(0, repo_root)
 
@@ -30,9 +32,6 @@ def _env(*arg, **kwargs):
 
 name_val = [
 
-    ('GIT_URL'                , 'brand.git_url'),
-    ('GIT_BRANCH'             , 'brand.git_branch'),
-
     ('SEARX_URL'              , 'server.base_url'),
     ('SEARX_PORT'             , 'server.port'),
     ('SEARX_BIND_ADDRESS'     , 'server.bind_address'),
@@ -57,8 +56,9 @@ from searx import get_setting
 
 print('build %s (settings from: %s)' % (brand_env, os.environ['SEARX_SETTINGS_PATH']))
 sys.path.insert(0, repo_root)
-from searx import settings
 
 with open(repo_root + sep + brand_env, 'w', encoding='utf-8') as f:
     for name, option in name_val:
         print("export %s='%s'" % (name, _env(option)), file=f)
+    print(f"export GIT_URL='{GIT_URL}'", file=f)
+    print(f"export GIT_BRANCH='{GIT_BRANCH}'", file=f)

utils/searx.sh

@@ -429,13 +429,11 @@ EOF
     popd > /dev/null
 }
 
+# shellcheck disable=SC2034
 prompt_installation_status(){
 
-    local state branch remote remote_url instance_setting
+    local state branch remote remote_url GIT_URL GIT_BRANCH VERSION_STRING VERSION_TAG
     state="$(install_searx_get_state)"
-    branch="$(git name-rev --name-only HEAD)"
-    remote="$(git config branch."${branch}".remote)"
-    remote_url="$(git config remote."${remote}".url)"
 
     case $state in
         missing-searx-clone)
@@ -445,14 +443,16 @@ prompt_installation_status(){
         *)
             warn_msg "SearXNG instance already installed at: $SEARX_SRC"
             warn_msg "status:  ${_BBlue}$(install_searx_get_state)${_creset} "
-            instance_setting="$(prompt_installation_setting brand.git_url)"
-            if ! [ "$instance_setting" = "$remote_url" ]; then
-                warn_msg "instance's brand.git_url: '${instance_setting}'" \
+            branch="$(git name-rev --name-only HEAD)"
+            remote="$(git config branch."${branch}".remote)"
+            remote_url="$(git config remote."${remote}".url)"
+            eval "$(get_installed_version_variables)"
+            if ! [ "$GIT_URL" = "$remote_url" ]; then
+                warn_msg "instance's git URL: '${GIT_URL}'" \
                          "differs from local clone's remote URL: ${remote_url}"
             fi
-            instance_setting="$(prompt_installation_setting brand.git_branch)"
-            if ! [ "$instance_setting" = "$branch" ]; then
-                warn_msg "instance brand.git_branch: ${instance_setting}" \
+            if ! [ "$GIT_BRANCH" = "$branch" ]; then
+                warn_msg "instance git branch: ${GIT_BRANCH}" \
                          "differs from local clone's branch: ${branch}"
             fi
             return 42
@@ -469,7 +469,7 @@ verify_continue_install(){
 
 prompt_installation_setting(){
 
-    # usage:  prompt_installation_setting brand.git_url
+    # usage:  prompt_installation_setting brand.docs_url
     #
     # Prompts the value of the (YAML) setting in the SearXNG instance.
 
@@ -496,6 +496,23 @@ EOF
     esac
 }
 
+get_installed_version_variables() {
+
+    # usage:  eval "$(get_installed_version_variables)"
+    #
+    # Set variables VERSION_STRING, VERSION_TAG, GIT_URL, GIT_BRANCH
+
+    local _state
+    _state="$(install_searx_get_state)"
+    case $_state in
+        python-installed|installer-modified)
+            sudo -H -u "${SERVICE_USER}" "${SEARX_PYENV}/bin/python -m searx.version";;
+        *)
+            return 42
+            ;;
+    esac
+}
+
 init_SEARX_SRC(){
     rst_title "Update instance: ${SEARX_SRC}/" section