Use pipx instead of python -m pip

Author: agateau

ci/lib/common-dependencies.sh

@@ -1,16 +1,13 @@
 AQTINSTALL_VERSION=3.1.0
 AQTINSTALL_ARCHIVES="qtbase qtimageformats qtsvg qttranslations qttools"
 
-setup_python_cmd() {
-    echo_title "Looking for a Python 3 + pip installation"
-    for interpreter in python3 python ; do
-        if $interpreter -m pip --version 2> /dev/null ; then
-            echo "Found $interpreter"
-            add_env_var PYTHON_CMD $interpreter
-            return
-        fi
-    done
-    die "Can't find a valid Python 3 installation."
+check_pipx() {
+    echo_title "Looking for pipx"
+    if command -v pipx 2> /dev/null ; then
+        echo "Found pipx"
+        return
+    fi
+    die "Can't find pipx."
 }
 
 install_qt() {
@@ -23,9 +20,9 @@ install_qt() {
     if is_macos ; then
         aqt_args="mac desktop $QT_VERSION $QT_ARCH_MACOS"
     fi
-    $PYTHON_CMD -m pip install aqtinstall==$AQTINSTALL_VERSION
+    pipx install aqtinstall==$AQTINSTALL_VERSION
 
-    $PYTHON_CMD -m aqt install-qt \
+    aqt install-qt \
         $aqt_args \
         --outputdir $qt_install_dir \
         --archives $AQTINSTALL_ARCHIVES
@@ -44,7 +41,7 @@ install_qt() {
 
 install_cmake() {
     echo_title "Installing CMake"
-    $PYTHON_CMD -m pip install cmake==$CMAKE_VERSION
+    pipx install cmake==$CMAKE_VERSION
 }
 
 install_ecm() {

ci/lib/common.sh

@@ -52,18 +52,6 @@ mkabsdir() {
     pop > /dev/null
 }
 
-init_python_cmd() {
-    echo_title "Looking for a Python 3 + pip installation"
-    for interpreter in python3 python ; do
-        if $interpreter -m pip --version 2> /dev/null ; then
-            echo "Found $interpreter"
-            export PYTHON_CMD=$interpreter
-            return
-        fi
-    done
-    die "Can't find a valid Python 3 installation."
-}
-
 init_run_as_root() {
     RUN_AS_ROOT=""
     if is_windows ; then
@@ -127,7 +115,6 @@ install_prebuilt_executable() {
 }
 
 detect_os
-init_python_cmd
 init_run_as_root
 
 if is_macos ; then

ci/lib/linux-dependencies.sh

@@ -23,6 +23,5 @@ main() {
         die "Sorry, I don't know how to install the required packages on your distribution."
     fi
 
-    setup_python_cmd
     install_cmake
 }

ci/lib/macos-dependencies.sh

@@ -1,7 +1,6 @@
 main() {
-    setup_python_cmd
     install_qt
     install_cmake
     install_ecm
-    pip3 install ds_store==1.1.2
+    pipx install ds_store==1.1.2
 }