{"id":207428,"date":"2025-07-08T09:03:25","date_gmt":"2025-07-08T01:03:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207428\/"},"modified":"2025-07-08T09:03:25","modified_gmt":"2025-07-08T01:03:25","slug":"%e4%bd%bf%e7%94%a8%e7%b1%bb%e4%bc%bc-bash-%e7%9a%84%e7%8e%af%e5%a2%83%e5%8f%98%e9%87%8f%e5%bc%95%e7%94%a8%e6%8f%92%e5%85%a5%e5%ad%97%e7%ac%a6%e4%b8%b2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207428\/","title":{"rendered":"\u4f7f\u7528\u7c7b\u4f3c bash \u7684\u73af\u5883\u53d8\u91cf\u5f15\u7528\u63d2\u5165\u5b57\u7b26\u4e32"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u4f7f\u7528\u7c7b\u4f3c bash \u7684\u73af\u5883\u53d8\u91cf\u5f15\u7528\u63d2\u5165\u5b57\u7b26\u4e32<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-22 15:27:35<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7\u300a\u4f7f\u7528\u7c7b\u4f3c bash \u7684\u73af\u5883\u53d8\u91cf\u5f15\u7528\u63d2\u5165\u5b57\u7b26\u4e32\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0Golang<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u7684 golang cli \u5de5\u5177\u6709\u4e00\u4e2a\u8f93\u5165\u5b57\u7b26\u4e32\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e9b\u5bf9 bash \u8bed\u6cd5\u4e2d\u7684\u73af\u5883\u53d8\u91cf\u7684\u5f15\u7528\uff08$var<\/code> \u548c ${var}<\/code>\uff09\uff0c\u4f8b\u5982\uff1a<\/p>\n

$home\/somedir\/${some_variable}dir\/anotherdir-${another_variable}\n<\/pre>\n
\u901a\u8fc7\u7528\u5b9e\u9645\u503c\u66ff\u6362\u73af\u5883\u53d8\u91cf\u5f15\u7528\u6765\u63d2\u5165\u8be5\u5b57\u7b26\u4e32\u7684\u6700\u6709\u6548\u65b9\u6cd5\u662f\u4ec0\u4e48\uff1f \u5bf9\u4e8e\u524d\u9762\u7684\u793a\u4f8b\uff0c\u5b83\u53ef\u4ee5\u662f\uff1a<\/p>\n
\/home\/user\/somedir\/4dir\/anotherdir-5\n<\/pre>\n
\u5982\u679c home=\/home\/user<\/code>\u3001some_variable=4<\/code> \u4e14 another_variable=5<\/code>\u3002<\/p>\n
\u73b0\u5728\u6211\u6b63\u5728\u4f7f\u7528\u7c7b\u4f3c\u7684\u4e1c\u897f\uff1a<\/p>\n
func interpolate(str string) string {\n        for _, e := range os.Environ() {\n                parts := strings.SplitN(e, \"=\", 2)\n                name, value := parts[0], parts[1]\n                str = strings.Replace(str, \"$\" + name, value, -1)\n        }\n        return str\n}\n<\/pre>\n
\u4f46\u6b64\u4ee3\u7801\u4e0d\u5904\u7406 ${}<\/code> \u53d8\u91cf\u3002<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u4f7f\u7528\uff1a<\/p>\n
s := os.expandenv(\n    \"$home\/somedir\/${some_variable}dir\/anotherdir-${another_variable}\")<\/pre>\n
\u5982\u679c\u503c\u4e0d\u662f\u4ece\u73af\u5883\u53d8\u91cf\u4e2d\u83b7\u53d6\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528 \uff1a<\/p>\n
m := map[string]string{\n    \"HOME\":             \"\/home\/user\",\n    \"SOME_VARIABLE\":    \"4\",\n    \"ANOTHER_VARIABLE\": \"5\",\n}\ns := os.Expand(\n    \"$HOME\/somedir\/${SOME_VARIABLE}dir\/anotherdir-${ANOTHER_VARIABLE}\", \n    func(s string) string { return m[s] })<\/pre>\n
\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u300a\u4f7f\u7528\u7c7b\u4f3c bash \u7684\u73af\u5883\u53d8\u91cf\u5f15\u7528\u63d2\u5165\u5b57\u7b26\u4e32\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207428","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207428","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207428"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207428\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207428"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207428"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}