Why Can't Go Build Find My Package Even Though GOPATH Is Set?

"Go build: "Cannot find package" (even though GOPATH is set)" Resolved

When attempting to build Go packages, errors related to finding packages may occur despite configuring GOPATH. This issue arises when the source file for a package is not located in a directory named after the package.

Solution:

To resolve this, the following steps should be taken:

1. Set $GOPATH correctly:

   • Ensure that $GOPATH is set to a valid directory, such as export GOPATH="$HOME/go".

2. Organize package directories:

   • Move the source file (e.g., foobar.go) into a subdirectory within $GOPATH/src that corresponds to the package name (e.g., $GOPATH/src/foobar).

3. Configure environment:

   • Add $GOPATH/bin to your $PATH by modifying it to PATH="$GOPATH/bin:$PATH".

4. Organize main.go:

   • Move the main.go file into a subfolder of $GOPATH/src, such as $GOPATH/src/test.

5. Install package:

   • Run go install test to create an executable in $GOPATH/bin that can be executed as test.

Additional Recommendations:

• Ensure that your GOPATH is not empty or contains unrelated files.
• Keep package directories and source files well-organized.
• Consider using a tool like gb (Go Build) to simplify package management.

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