Easily generate version information for Node.js applications. versionly
generates a JSON string or JavaScript object containing version information,
which is useful for analyzing production deployments. versionly
outputs
information such as package.json
version, git commit hash, select environment
variables, and more.
versionly
can be used within a larger Node.js application, or standalone as
a command line utility, as shown below.
npx versionly -p version -g gitcommit -e user:USER -d date:now -a foo:bar
If run in a directory containing a package.json
file and git history, the
command will output JSON similar to the following:
{
"version": "0.1.15",
"gitcommit": "8e13cc2f0afa61b1bb0101de048dea407834adfa",
"user": "cjihrig",
"date": "1580910189983",
"foo": "bar"
}
The same information can be generated programmatically:
'use strict';
const { generate } = require('versionly');
console.log(JSON.stringify(generate(
[
'-p', 'version',
'-g', 'gitcommit',
'-e', 'user:USER',
'-d', 'date:now',
'-a', 'foo:bar'
]
)));
Both the CLI and JavaScript API operate on an array of argument pairs. The first entry in each pair denotes the type of information to generate (git hash, date, environment variable, etc.). The second entry in each pair denotes the key name in the object/JSON output, followed by any necessary parameters:
The -a
option indicates a user-supplied annotation. For example, -a foo:bar
adds a foo
key to the output whose value is 'bar'
.
The -d
option adds the current date to the output. If format
is specified,
it denotes the string representation of the date. Supported formats are:
now
- Outputs the date'svalueOf()
as a string. This is the default.iso
- Outputs the date'stoISOString()
string.locale
- Outputs the date'stoLocaleString()
string.localedate
- Outputs the date'stoLocaleDateString()
string.localetime
- Outputs the date'stoLocaleTimeString()
string.time
- Outputs the date'stoTimeString()
string.utc
- Outputs the date'stoUTCString()
string.
If an unrecognized date format is provided, an exception is thrown.
For example, -d date:utc
adds a date
key to the output whose value is the
UTC representation of the current date.
The -e
option includes the environment variable envvar
in the output. If the
specified environment variable does not exist, an exception is thrown.
For example, -e user:USER
adds a user
key to the output whose value is the
content of the USER
environment variable.
The -f
option includes the contents of the file filename
in the output. If
filename
cannot be read, an exception is thrown.
For example, -f license:./LICENSE
adds a license
key to the output whose
value is the content of the file ./LICENSE
.
The -g
option includes the hash of the most recent git commit. The hash is
computed by running git rev-parse HEAD
. If the git commit cannot be obtained,
an exception is thrown. For example, -g gitcommit
adds a gitcommit
key to
the output whose value is the most recent git commit hash.
The -p
option includes the version
field from the specified package
file.
If present, package
must be the path to a valid package.json
file. If
package
is not provided, it defaults to searching for a package.json
file in
the current working directory. If a package cannot be loaded, an exception is
thrown. For example, -p version
adds a version
key to the output whose value
comes from the package.json
file in the current directory.