{"id":4269,"date":"2020-11-01T20:23:33","date_gmt":"2020-11-01T14:53:33","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=4269"},"modified":"2020-11-01T20:23:40","modified_gmt":"2020-11-01T14:53:40","slug":"import-local-module-golang","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/import-local-module-golang\/","title":{"rendered":"Importing package from different module locally in Go (Golang)"},"content":{"rendered":"\n<p class=\"has-medium-font-size\">There are cases when we want to import a module which is present locally. Let&#8217;s understand how we can import such module. But first, we have to create a module that can be used by others and then import it into the other module.&nbsp;For that let&#8217;s create two modules<\/p>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li><strong>sample.com\/math<\/strong> module<\/li><li><strong>school<\/strong> module<\/li><\/ul>\n\n\n\n<p class=\"has-medium-font-size\"><strong>school<\/strong> module will be calling code of the <strong>sample.com\/math<\/strong> module<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Let&#8217;s first create the <strong>sample.com\/math<\/strong> module which will be used by <strong>school<\/strong> module<\/p>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li>Make a <strong>math<\/strong> directory<\/li><\/ul>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li>Create a module with an import path as <strong>sample.com\/math<\/strong><\/li><\/ul>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">go mod init sample.com\/math<\/code><\/pre>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li>Create a file <strong>math.go<\/strong> with the below contents\u00a0 in the <strong>math<\/strong> directory<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package math\n\nfunc Add(a, b int) int {\n\treturn a + b\n}<\/code><\/pre>\n\n\n\n<p>Now<strong> <\/strong>let&#8217;s create the school module<\/p>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li>Create a <strong>school<\/strong> directory in the same path as the <strong>math<\/strong> directory side by side<\/li><li>Create a module name <strong>school<\/strong><\/li><\/ul>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">go mod init school<\/code><\/pre>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li>Now let&#8217;s modify the <strong>go.mod<\/strong> file to import the math module in the school module. To import a local module that is not pushed to VCS, we are going to use the replace directory. The replace directory will replace the module path with the path you specify.<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">module school\n\ngo 1.14\n\nreplace sample.com\/math => ..\/math<\/code><\/pre>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li>Create file <strong>school.go<\/strong> which is going to use the <strong>Add<\/strong> function in <strong><a href=\"http:\/\/sample.com\">sample.com<\/a>\/math <\/strong>module<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\n\nimport (\n\t\"fmt\"\n\t\"sample.com\/math\"\n)\n\nfunc main() {\n\tfmt.Println(math.Add(2, 4))\n}<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\">Now do a go run<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">go run school.go<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\">It is able to call the Add function of the <strong><a href=\"http:\/\/sample.com\">sample.com<\/a>\/math\u00a0 <\/strong>module and correctly gives the output as 6.<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Also, it will update the <strong>go.mod<\/strong> with version information of the <strong><a href=\"http:\/\/sample.com\">sample.com<\/a>\/math <\/strong>module<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">module school\n\ngo 1.14\n\nreplace sample.com\/math => ..\/math\n\nrequire sample.com\/math v0.0.0-00010101000000-000000000000<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>There are cases when we want to import a module which is present locally. Let&#8217;s understand how we can import such module. But first, we have to create a module that can&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false},"categories":[1],"tags":[3,4],"class_list":["post-4269","post","type-post","status-publish","format-standard","hentry","category-tech","tag-go","tag-golang"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Importing package from different module locally in Go (Golang) - Welcome To Golang By Example<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/golangbyexamples.com\/import-local-module-golang\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Importing package from different module locally in Go (Golang) - Welcome To Golang By Example\" \/>\n<meta property=\"og:description\" content=\"There are cases when we want to import a module which is present locally. 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