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Showing content from https://docs.deno.com/runtime/reference/cli/install/ below:

deno install

Command line usage:

deno install [OPTIONS] [cmd]...

Installs dependencies either in the local project or globally to a bin directory.

Add dependencies to the local project's configuration (deno.json / package.json) and installs them in the package cache. If no dependency is specified, installs all dependencies listed in the config file. If the --entrypoint flag is passed, installs the dependencies of the specified entrypoint(s).

deno install jsr:@std/bytes

deno install --entrypoint entry1.ts entry2.ts

If the --global flag is set, installs a script as an executable in the installation root's bin directory.

deno install --global --allow-net --allow-read jsr:@std/http/file-server

deno install -g https://examples.deno.land/color-logging.ts

To change the executable name, use -n/--name:

deno install -g --allow-net --allow-read -n serve jsr:@std/http/file-server

The executable name is inferred by default:

• Attempt to take the file stem of the URL path. The above example would become file_server.
• If the file stem is something generic like main, mod, index or cli, and the path has no parent, take the file name of the parent path. Otherwise settle with the generic name.
• If the resulting name has an @... suffix, strip it.

To change the installation root, use --root:

deno install -g --allow-net --allow-read --root /usr/local jsr:@std/http/file-server

The installation root is determined, in order of precedence:

• --root option
• DENO_INSTALL_ROOT environment variable
• $HOME/.deno

These must be added to the path manually if required.

Set type-checking behavior. This subcommand type-checks local modules by default, so adding --check is redundant If the value of "all" is supplied, remote modules will be included. Alternatively, the 'deno check' subcommand can be used.

Skip type-checking. If the value of "remote" is supplied, diagnostic errors from remote modules will be ignored.

Require that remote dependencies are already cached.

Error out if lockfile is out of date.

Load import map file from local file or remote URL.

Check the specified lock file. (If value is not provided, defaults to "./deno.lock").

Disable auto discovery of the lock file.

Do not resolve npm modules.

Do not resolve remote modules.

Sets the node modules management mode for npm packages.

Short flag: -r

Reload source code cache (recompile TypeScript) no value Reload everything jsr:@std/http/file-server,jsr:@std/assert/assert-equals Reloads specific modules npm: Reload all npm modules npm:chalk Reload specific npm module.

Toggles local vendor folder usage for remote modules and a node_modules folder for npm packages.

Allow running npm lifecycle scripts for the given packages Note: Scripts will only be executed when using a node_modules directory (--node-modules-dir).

Load certificate authority from PEM encoded file.

Use this argument to specify custom conditions for npm package exports. You can also use DENO_CONDITIONS env var. .

Short flag: -c

Configure different aspects of deno including TypeScript, linting, and code formatting. Typically the configuration file will be called deno.json or deno.jsonc and automatically detected; in that case this flag is not necessary.

Short flag: -D

Add the package as a dev dependency. Note: This only applies when adding to a package.json file.

Short flag: -e

Install dependents of the specified entrypoint(s).

Load environment variables from local file Only the first environment variable with a given key is used. Existing process environment variables are not overwritten, so if variables with the same names already exist in the environment, their values will be preserved. Where multiple declarations for the same environment variable exist in your .env file, the first one encountered is applied. This is determined by the order of the files you pass as arguments.

Short flag: -f

Forcefully overwrite existing installation.

Short flag: -g

Install a package or script as a globally available executable.

assume unprefixed package names are jsr packages.

Value of globalThis.location used by some web APIs.

Short flag: -n

Executable file name.

Disable automatic loading of the configuration file.

assume unprefixed package names are npm packages.

A list of files that will be executed before the main module.

Installation root.

Set the random number generator seed.

To see a list of all available flags use --v8-flags=--help Flags can also be set via the DENO_V8_FLAGS environment variable. Any flags set with this flag are appended after the DENO_V8_FLAGS environment variable.

Activate inspector on host:port [default: 127.0.0.1:9229]

Activate inspector on host:port, wait for debugger to connect and break at the start of user script.

Activate inspector on host:port and wait for debugger to connect before running user code.

Use this command to install all dependencies defined in deno.json and/or package.json.

The dependencies will be installed in the global cache, but if your project has a package.json file, a local node_modules directory will be set up as well.

Use this command to install particular packages and add them to deno.json or package.json.

$ deno install jsr:@std/testing npm:express

Tip

You can also use deno add which is an alias to deno install [PACKAGES]

If your project has a package.json file, the packages coming from npm will be added to dependencies in package.json. Otherwise all packages will be added to deno.json.

Use this command to install all dependencies that are used in the provided files and their dependencies.

This is particularly useful if you use jsr:, npm:, http: or https: specifiers in your code and want to cache all the dependencies before deploying your project.

main.js

import * as colors from "jsr:@std/fmt/colors";
import express from "npm:express";

$ deno install -e main.js
Download jsr:@std/fmt
Download npm:express

Tip

If you want to set up local node_modules directory, you can pass --node-modules-dir=auto flag.

Some dependencies might not work correctly without a local node_modules directory.

Use this command to install provide package or script as a globally available binary on your system.

This command creates a thin, executable shell script which invokes deno using the specified CLI flags and main module. It is placed in the installation root.

Example:

$ deno install --global --allow-net --allow-read jsr:@std/http/file-server
Download jsr:@std/http/file-server...

✅ Successfully installed file-server.
/Users/deno/.deno/bin/file-server

To change the executable name, use -n/--name:

deno install -g -N -R -n serve jsr:@std/http/file-server

The executable name is inferred by default:

• Attempt to take the file stem of the URL path. The above example would become 'file-server'.
• If the file stem is something generic like 'main', 'mod', 'index' or 'cli', and the path has no parent, take the file name of the parent path. Otherwise settle with the generic name.
• If the resulting name has an '@...' suffix, strip it.

To change the installation root, use --root:

deno install -g -N -R --root /usr/local/bin jsr:@std/http/file-server

The installation root is determined, in order of precedence:

• --root option
• DENO_INSTALL_ROOT environment variable
• $HOME/.deno/bin

These must be added to the path manually if required.

echo 'export PATH="$HOME/.deno/bin:$PATH"' >> ~/.bashrc

You must specify permissions that will be used to run the script at installation time.

deno install -g -N -R jsr:@std/http/file-server -- -p 8080

The above command creates an executable called file_server that runs with network and read permissions and binds to port 8080.

For good practice, use the import.meta.main idiom to specify the entry point in an executable script.

Example:

async function myAwesomeCli(): Promise<void> {
  
}

if (import.meta.main) {
  myAwesomeCli();
}

When you create an executable script make sure to let users know by adding an example installation command to your repository:

$ deno install -n awesome_cli https://example.com/awesome/cli.ts

A lot of popular packages npm packages like npm:sqlite3 or npm:duckdb depend on "lifecycle scripts", eg. preinstall or postinstall scripts. Most often running these scripts is required for a package to work correctly.

Unlike npm, Deno does not run these scripts by default as they pose a potential security vulnerability.

You can still run these scripts by passing the --allow-scripts=<packages> flag when running deno install:

deno install --allow-scripts=npm:sqlite3

Install all dependencies and allow npm:sqlite3 package to run its lifecycle scripts.

The --quiet flag suppresses diagnostic output when installing dependencies. When used with deno install, it will hide progress indicators, download information, and success messages.

$ deno install --quiet jsr:@std/http/file-server

This is useful for scripting environments or when you want cleaner output in CI pipelines.

You can uninstall dependencies or binary script with deno uninstall command:

$ deno uninstall express
Removed express

$ deno uninstall -g file-server
deleted /Users/deno/.deno/bin/file-server
✅ Successfully uninstalled file-server

See deno uninstall page for more details.

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