README.md

@@ -0,0 +1,5 @@
+# nix_virtualenvs
+
+This is a repository for different virtual environments, which can be used with the **Nix** package manager.
+
+Just copy the content of the desired folder to your project, add your required packages to the `*.txt` file and run `nix-shell`.

README.org

@@ -1,34 +0,0 @@
-* nix_environments
-
-  This is a set of various environments which can be used with the *Nix* package manager.
-
-  Copy the =shell.nix= file from the desired folder into your project and run ~nix-shell~.
-  This will drop you into a virtual environment with all requirements fulfilled.
-  Please check below how the virtual environments work and how to add environment specific packages.
- 
-  If you need more Nix packages in your environent, enhance the list ~buildInputs~ in the file =shell.nix=.
-
-** node
-
-   This environment does the following:
-
-   1. Create a directory =.npm/bin= if not existent
-   2. Add the =.npm/bin= directory to the ~$PATH~ variable
-   3. Upgrade npm to the latest version
-   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
-
-   This environment does the following:
-
-   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
-
-   This environment does the following:
-
-   1. Run ~cargo build~ if =Cargo.toml= is present

node/shell.nix

@@ -1,38 +0,0 @@
-{ pkgs ? import <nixpkgs> {} }:
-pkgs.mkShell {
-  buildInputs = with pkgs; [
-    nodejs
-  ];
-  shellHook = ''
-    function log_header {
-      echo -ne "==> \e[32m\e[1m$1\e[0m\n"
-    }
-    function log_subheader {
-      echo -ne "--> \e[33m\e[1m$1\e[0m\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
-    log_header "package versions"
-    log "node $(node --version)"
-    log "npm $(npm --version)"
-  '';
-}

node_environment/default.nix

@@ -0,0 +1,19 @@
+with import <nixpkgs> {};
+
+stdenv.mkDerivation {
+  name = "myNodeEnv";
+  buildInputs = with pkgs; [
+    nodejs
+  ];
+  src = null;
+  shellHook = ''
+    mkdir -p .npm
+    if [ -s global_packages.txt ]; then
+      cat global_packages.txt | xargs npm install -g --prefix $PWD/.npm
+    fi
+    if [ -s package.json ]; then
+      npm install
+    fi
+    export PATH=$PWD/.npm/bin:$PATH
+  '';
+}

python/shell.nix

@@ -1,36 +0,0 @@
-{ pkgs ? import <nixpkgs> {} }:
-pkgs.mkShell {
-  buildInputs = with pkgs; [
-    python3
-    python3Packages.virtualenv
-  ];
-  shellHook = ''
-    function log_header {
-      echo -ne "==> \e[32m\e[1m$1\e[0m\n"
-    }
-    function log_subheader {
-      echo -ne "--> \e[33m\e[1m$1\e[0m\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)"
-  '';
-}

python_environment/default.nix

@@ -0,0 +1,20 @@
+with import <nixpkgs> {};
+
+stdenv.mkDerivation {
+  name = "myPythonEnv";
+  buildInputs = with pkgs; [
+    python38Full
+    python38Packages.virtualenv
+  ];
+  src = null;
+  shellHook = ''
+    if [ ! -d .venv ]; then
+      python -m venv .venv
+    fi
+    source .venv/bin/activate
+    pip install --upgrade pip
+    if [ -s requirements.txt ]; then
+      pip install -r requirements.txt
+    fi
+  '';
+}

rust/shell.nix

@@ -1,31 +0,0 @@
-{ pkgs ? import <nixpkgs> {} }:
-pkgs.mkShell {
-  NIX_ENFORCE_PURITY=0;
-  buildInputs = with pkgs; [
-    cargo
-    rustc
-    rustfmt
-  ];
-  shellHook = ''
-    function log_header {
-      echo -ne "==> \e[32m\e[1m$1\e[0m\n"
-    }
-    function log_subheader {
-      echo -ne "--> \e[33m\e[1m$1\e[0m\n"
-    }
-    function log {
-      echo -ne "    $1\n"
-    }
-
-    echo ""
-    log_header "rust_environment"
-    if [ -s Cargo.toml ]; then
-      log_subheader "found Cargo.toml, running 'cargo-build'"
-      cargo build
-      echo ""
-    fi
-    log_header "package versions"
-    log "$(rustc --version)"
-    log "$(cargo --version)"
-  '';
-}