run and build functions for make/cmake/just/python and automatic venv activation/deactivation

.zshrc

@@ -6,6 +6,10 @@
 [[ $- != *i* ]] && return
 
 
+RUN_CMD=""
+BUILD_CMD=""
+
+
 CACHE_DIR=${XDG_CACHE_HOME:-$HOME/.cache}
 STATE_DIR=${XDG_STATE_HOME:-$HOME/.local/state}
 
@@ -89,7 +93,9 @@ function set_prompt() {
 	local colors=(${(@s:~:)PROMPT_COLORS})
 	local prefixes=(${(@s:~:)PROMPT_PREFIXES})
 
-	local prefix=''
+    manage_environments
+
+	local prefix="${environment}"
 	for i in $(seq 1 "${#prefixes[@]}"); do
 		prefix+="%F{${colors[$i]:-255}}${prefixes[$i]}%F{255} "
 	done
@@ -102,12 +108,85 @@ function set_prompt() {
     fi
 
 	PROMPT="[${prefix}${user}${host} %1~]%(#.#.$) "
+
+    unset environment
 }
 
 typeset -a precmd_functions
 precmd_functions+=(set_prompt)
 
 
+function manage_environments() {
+    RUN_CMD=""
+    BUILD_CMD=""
+
+    local dir=$(pwd)
+    local depth=0
+    while [ "$dir" != '/' ] && [ "$depth" -lt 20 ]; do
+        if [ -f "$dir/justfile" ]; then
+            environment="just:$(basename $dir) "
+            RUN_CMD="just run"
+            BUILD_CMD="just build"
+            break
+        fi
+
+        if [ -f "$dir/CMakeLists.txt" ] && [ -d "$dir/build" ]; then
+            environment="cmake:$(basename $dir) "
+            RUN_CMD="cmake --build $dir/build --target install"
+            BUILD_CMD="cmake --build $dir/build"
+            break
+        fi
+
+        if [ -f "$dir/Makefile" ]; then
+            environment="make:$(basename $dir) "
+            RUN_CMD="make -C $dir run"
+            BUILD_CMD="make -C $dir"
+            break
+        fi
+
+        if [ -f "$dir/venv/bin/activate" ]; then
+            if [ "$VIRTUAL_ENV" != "$dir/venv" ]; then
+                . "$dir/venv/bin/activate"
+            fi
+            environment="python:$(basename dir) "
+
+            local pyfiles=($dir/*.py)
+            if [ -f "$dir/main.py" ]; then
+                RUN_CMD="python3 $dir/main.py"
+            elif [ "${#pyfiles}" -eq 1 ]; then
+                RUN_CMD="python3 ${pyfiles}"
+            fi
+            break
+        fi
+
+        dir=$(dirname "$dir")
+        depth=$(( $depth + 1 ))
+    done
+
+    if [ -n "$VIRTUAL_ENV" ] && [[ ! "$environment" =~ "python" ]]; then
+        deactivate
+    fi
+}
+
+
+function run() {
+    if [ -n "$RUN_CMD" ]; then
+        eval "$RUN_CMD"
+    else
+        printf "Nothing to do here\n"
+    fi
+}
+
+
+function build() {
+    if [ -n "$BUILD_CMD" ]; then
+        eval "$BUILD_CMD"
+    else
+        printf "Nothing to do here\n"
+    fi
+}
+
+
 
 # Setup bookmarks
 BOOKMARKS_DIR="$HOME/bookmarks"