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19055df3ec
* Updating the license from MPL to Business Source License Going forward, this project will be licensed under the Business Source License v1.1. Please see our blog post for more details at https://hashi.co/bsl-blog, FAQ at https://hashi.co/license-faq, and details of the license at www.hashicorp.com/bsl. * Update copyright file headers to BUSL-1.1 --------- Co-authored-by: hashicorp-copywrite[bot] <110428419+hashicorp-copywrite[bot]@users.noreply.github.com>
72 lines
2.1 KiB
Go
72 lines
2.1 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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package main
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import (
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"fmt"
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"io"
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"os"
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"strings"
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"github.com/hashicorp/packer/packer"
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"github.com/mitchellh/panicwrap"
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)
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// This is output if a panic happens.
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const panicOutput = `
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!!!!!!!!!!!!!!!!!!!!!!!!!!! PACKER CRASH !!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Packer crashed! This is always indicative of a bug within Packer.
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A crash log has been placed at "crash.log" relative to your current
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working directory. It would be immensely helpful if you could please
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report the crash with Packer[1] so that we can fix this.
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[1]: https://github.com/hashicorp/packer/issues
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!!!!!!!!!!!!!!!!!!!!!!!!!!! PACKER CRASH !!!!!!!!!!!!!!!!!!!!!!!!!!!!
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`
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// panicHandler is what is called by panicwrap when a panic is encountered
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// within Packer. It is guaranteed to run after the resulting process has
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// exited so we can take the log file, add in the panic, and store it
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// somewhere locally.
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func panicHandler(logF *os.File) panicwrap.HandlerFunc {
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return func(m string) {
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// Write away just output this thing on stderr so that it gets
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// shown in case anything below fails.
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fmt.Fprintf(os.Stderr, fmt.Sprintf("%s\n", m))
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if err := packer.CheckpointReporter.ReportPanic(m); err != nil {
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fmt.Fprintf(os.Stderr, "Failed to report panic. This is safe to ignore: %s", err)
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}
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// Create the crash log file where we'll write the logs
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f, err := os.Create("crash.log")
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if err != nil {
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fmt.Fprintf(os.Stderr, "Failed to create crash log file: %s", err)
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return
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}
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defer f.Close()
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// Seek the log file back to the beginning
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if _, err = logF.Seek(0, 0); err != nil {
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fmt.Fprintf(os.Stderr, "Failed to seek log file for crash: %s", err)
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return
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}
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// Copy the contents to the crash file. This will include
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// the panic that just happened.
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if _, err = io.Copy(f, logF); err != nil {
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fmt.Fprintf(os.Stderr, "Failed to write crash log: %s", err)
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return
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}
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// Tell the user a crash occurred in some helpful way that
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// they'll hopefully notice.
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fmt.Printf("\n\n")
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fmt.Println(strings.TrimSpace(panicOutput))
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}
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}
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