<h2 id="hed900658dc">環境</h2><ul><li>Windows 11 Home</li><li>Go 1.20</li><li>Echo v3.3.10</li><li>Air v1.41.0(※Golangのホットリロードツール)</li><li>Docker Desktop v4.16.3</li></ul><h2 id="h7f506b9540">エラー</h2><p>Golangのホットリロードツールである「Air」のコマンド <code>air init</code>  で初期設定ファイル .air.toml を自動で出力したあとに、<br>Docker経由( <code>docker-compose up</code> )で開始コマンド <code>air</code> を実行したところ、途中でエラーが出る。</p><ul><li><strong>エラー内容(下記例: /bin/sh: 1: /go/src/app/tmpmain.exe: not found)</strong></li></ul><pre><code>PS C:\Users\&lt;user_name&gt;\&lt;project_dir&gt;\golang-test&gt; docker-compose up
[+] Running 1/0
&nbsp;- Container golang-test-app-1&nbsp; Created&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0.0s&nbsp;
Attaching to golang-test-app-1
golang-test-app-1&nbsp; |&nbsp;
golang-test-app-1&nbsp; |&nbsp; &nbsp;__&nbsp; &nbsp; _&nbsp; &nbsp;___
golang-test-app-1&nbsp; |&nbsp; / /\&nbsp; | | | |_)
golang-test-app-1&nbsp; | /_/--\ |_| |_| \_ , built with Go
golang-test-app-1&nbsp; |
golang-test-app-1&nbsp; | [23:56:56] watching .
golang-test-app-1&nbsp; | [23:56:56] !exclude tmp
golang-test-app-1&nbsp; | [23:56:56] building...
golang-test-app-1&nbsp; | [23:56:56] running...
golang-test-app-1&nbsp; | /bin/sh: 1: /go/src/app/tmpmain.exe: not found</code></pre><p><br></p><h3 id="hcab7a2fe74">修正前</h3><ul><li><strong>docker-compose.yml</strong></li></ul><pre><code>version: '3'
services:
&nbsp; app:
&nbsp; &nbsp; build: .
&nbsp; &nbsp; volumes:
&nbsp; &nbsp; &nbsp; - ./:/go/src/app
&nbsp; &nbsp; ports:
&nbsp; &nbsp; &nbsp; - "8080:8080"</code></pre><ul><li><strong>Dockerfile</strong></li></ul><pre><code>FROM golang:1.20

ENV ROOT=/go/src/app
WORKDIR ${ROOT}

COPY . .
EXPOSE 8080

# Airをインストール → 実行
RUN go install github.com/cosmtrek/air@latest
CMD ["air"]</code></pre><ul><li><strong>.air.toml</strong></li></ul><pre><code>root = "."
testdata_dir = "testdata"
tmp_dir = "tmp"

[build]
&nbsp; args_bin = []
&nbsp; bin = "tmp\\main.exe"
&nbsp; cmd = "go build -o ./tmp/main.exe ."
&nbsp; delay = 0
&nbsp; exclude_dir = ["assets", "tmp", "vendor", "testdata"]
&nbsp; exclude_file = []
&nbsp; exclude_regex = ["_test.go"]
&nbsp; exclude_unchanged = false
&nbsp; follow_symlink = false
&nbsp; full_bin = ""
&nbsp; include_dir = []
&nbsp; include_ext = ["go", "tpl", "tmpl", "html"]
&nbsp; include_file = []
&nbsp; kill_delay = "0s"
&nbsp; log = "build-errors.log"
&nbsp; rerun = false
&nbsp; rerun_delay = 500
&nbsp; send_interrupt = false
&nbsp; stop_on_error = false

[color]
&nbsp; app = ""
&nbsp; build = "yellow"
&nbsp; main = "magenta"
&nbsp; runner = "green"
&nbsp; watcher = "cyan"

[log]
&nbsp; main_only = false
&nbsp; time = false

[misc]
&nbsp; clean_on_exit = false

[screen]
&nbsp; clear_on_rebuild = false
&nbsp; keep_scroll = true</code></pre><p><br></p><h2 id="hc4c05c18f9">解決策</h2><p>.air.toml 内の <strong><code>bin = "tmp\\main.exe"</code></strong><strong>  を </strong><strong><code>bin = "tmp/main.exe"</code></strong><strong> に修正する。</strong><br></p><h3 id="hbac1cb0a86">修正後</h3><ul><li><strong>.air.toml</strong></li></ul><pre><code>root = "."
testdata_dir = "testdata"
tmp_dir = "tmp"

[build]
&nbsp; args_bin = []
&nbsp; bin = "tmp/main.exe" # ← ココ(修正箇所)
&nbsp; cmd = "go build -o ./tmp/main.exe ."
&nbsp; delay = 0
&nbsp; exclude_dir = ["assets", "tmp", "vendor", "testdata"]
&nbsp; exclude_file = []
&nbsp; exclude_regex = ["_test.go"]
&nbsp; exclude_unchanged = false
&nbsp; follow_symlink = false
&nbsp; full_bin = ""
&nbsp; include_dir = []
&nbsp; include_ext = ["go", "tpl", "tmpl", "html"]
&nbsp; include_file = []
&nbsp; kill_delay = "0s"
&nbsp; log = "build-errors.log"
&nbsp; rerun = false
&nbsp; rerun_delay = 500
&nbsp; send_interrupt = false
&nbsp; stop_on_error = false

[color]
&nbsp; app = ""
&nbsp; build = "yellow"
&nbsp; main = "magenta"
&nbsp; runner = "green"
&nbsp; watcher = "cyan"

[log]
&nbsp; main_only = false
&nbsp; time = true

[misc]
&nbsp; clean_on_exit = false

[screen]
&nbsp; clear_on_rebuild = false
&nbsp; keep_scroll = true</code></pre><p><br></p><h2 id="h397e38daae">補足</h2><p>単純に、<u>Windows系とUNIX系のパスの違い(</u><a style="background-color:#ffffff" href="https://wa3.i-3-i.info/word18271.html" target="_blank" rel="noopener noreferrer"><u>参考</u></a><u>)</u>が原因でした...(^-^;)<br>修正前の状態でも、Docker上ではなくWindowsのローカル上、つまり直接 <code>air</code> コマンドから実行すると当然エラーは出ません。<br>Macであれば、UNIX系のパス(bin = "tmp/main.exe")で .air.toml を出力してくれるため、特に修正は不要でした。</p>

本記事ではGo言語とAir&Dockerでの「エラー `/bin/sh: 1: .../tmpmain.exe: not found﻿` の対処法」を紹介しています。対処する方法について、具体例を挙げながら紹介しています。

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【Go】Air&Dockerでのエラー `/bin/sh: 1: .../tmpmain.exe: not found` の対処法