add logging

README.org

@@ -10,14 +10,19 @@
 
 ** node_environment
 
-   1. Create a directory =.npm=
+   1. Create a directory =.npm/bin= if not existent
-   2. If the file =global_packages.txt= is present, install the packages via *npm* globally in the =.npm= directory
+   2. Add the =.npm/bin= directory to the ~$PATH~ variable
-   3. Run ~npm install~ if a file =package.json= is present
+   3. Upgrade npm to the latest version
-   4. Add the =.npm= directory to the ~$PATH~ variable
+   4. If the file =global_packages.txt= is present, install the packages via npm into the =.npm= directory
+   5. Run ~npm install~ if a file =package.json= is present
 
 ** python_environment
 
-   1. Create a new python virtualenv in the folder =.venv=
+   1. Create a new python virtualenv in the folder =.venv= if not existent
    2. Source the virtual environment
    3. Upgrade pip to the latest version
    4. If present, install the packages from the file =requirements.txt= via pip
+
+** rust_environment
+
+   1. Run ~cargo build~ if =Cargo.toml= is present

node_environment/shell.nix

@@ -5,13 +5,35 @@ pkgs.mkShell {
     nodejs
   ];
   shellHook = ''
-    mkdir -p .npm
+    function log_header {
+      echo -ne "==> \e[32m\e[1m$1\e[0m\n\n"
+    }
+    function log_subheader {
+      echo -ne "--> \e[33m\e[1m$1\e[0m\n\n"
+    }
+    function log {
+      echo -ne "    $1\n"
+    }
+    
+    echo ""
+    log_header "node_environment"
+    mkdir -p .npm/bin
+    export PATH=$PWD/.npm/bin:$PATH
+    log_subheader "upgrading npm"
+    npm install -g npm --prefix $PWD/.npm
+    echo ""
     if [ -s global_packages.txt ]; then
+      log_subheader "found global_packages.txt, installing packages"
       cat global_packages.txt | xargs npm install -g --prefix $PWD/.npm
+      echo ""
     fi
     if [ -s package.json ]; then
+      log_subheader "found package.json, running 'npm install'"
       npm install
+      echo ""
     fi
-    export PATH=$PWD/.npm/bin:$PATH
+    log_header "package versions"
+    log "node $(node --version)"
+    log "npm $(npm --version)"
   '';
 }

python_environment/shell.nix

@@ -6,13 +6,32 @@ pkgs.mkShell {
     python3Packages.virtualenv
   ];
   shellHook = ''
+    function log_header {
+      echo -ne "==> \e[32m\e[1m$1\e[0m\n\n"
+    }
+    function log_subheader {
+      echo -ne "--> \e[33m\e[1m$1\e[0m\n\n"
+    }
+    function log {
+      echo -ne "    $1\n"
+    }
+
+    echo ""
+    log_header "python_environment"
     if [ ! -d .venv ]; then
       python -m venv .venv
     fi
     source .venv/bin/activate
+    log_subheader "upgrading pip"
     pip install --upgrade pip
+    echo ""
     if [ -s requirements.txt ]; then
+      log_subheader "found requirements.txt, installing packages"
       pip install -r requirements.txt
+      echo ""
     fi
+    log_header "package versions"
+    log "$(python --version)"
+    log "$(pip --version)"
   '';
 }