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command-line command exists\n\n\n\n## installation\n\n```bash\nnpm install command-exists\n```\n\n## usage\n\n### async\n\n```js\nvar commandExists = require('command-exists');\n\ncommandExists('ls', function(err, commandExists) {\n\n    if(commandExists) {\n        // proceed confidently knowing this command is available\n    }\n\n});\n```\n### promise\n```js\nvar commandExists = require('command-exists');\n\n// invoked without a callback, it returns a promise\ncommandExists('ls')\n.then(function(command){\n    // proceed\n}).catch(function(){\n    // command doesn't exist\n});\n```\n\n### sync\n```js\nvar commandExistsSync = require('command-exists').sync;\n// returns true/false; doesn't throw\nif (commandExistsSync('ls')) {\n    // proceed\n} else {\n    // ...\n}\n\n```\n\n\n## changelog\n\n### v1.2.7\n\nRemoves unnecessary printed output on windows.\n\n### v1.2.6\n\nSmall bugfixes.\n\n### v1.2.5\n\nFix windows bug introduced in 1.2.4.\n\n### v1.2.4\n\nFix potential security issue.\n\n### v1.2.0\n\nAdd support for promises\n\n### v1.1.0\n\nAdd synchronous version\n\n### v1.0.2\n\nSupport for windows\n","_attachments":{},"homepage":"https://github.com/mathisonian/command-exists","bugs":{"url":"https://github.com/mathisonian/command-exists/issues"},"license":"MIT"}