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49 lines
2.1 KiB
Go
49 lines
2.1 KiB
Go
package git
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import (
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"os"
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"path/filepath"
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"runtime"
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)
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// NonInteractiveEnv returns the environment for a subprocess that may invoke
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// git, with git forced into a fully non-interactive mode. It is intended for
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// cmd.Env on any subprocess that may run git (our own git calls and the coding
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// agents we spawn).
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//
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// Without these overrides, git operations such as `git rebase --continue` or
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// `git commit` open $EDITOR to confirm a commit message, and remote operations
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// can block on a credential prompt. In a headless agent subprocess there is no
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// TTY, so the editor or prompt hangs until the agent times out. Pointing the
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// editors at `true` makes git accept the existing message immediately, and
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// GIT_TERMINAL_PROMPT=0 fails fast instead of blocking on credentials. The
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// overrides are appended last so they win over any ambient values (exec
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// resolves duplicate keys using the last occurrence).
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//
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// Pass the same directory assigned to cmd.Dir (or "" when it is unset). When
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// cmd.Env is left nil, os/exec injects PWD=cmd.Dir automatically; assigning
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// cmd.Env disables that, so callers must thread the working directory through
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// here to preserve symlinked working-directory paths (for example /tmp vs
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// /private/tmp on macOS, which os.Getwd reports differently depending on PWD).
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func NonInteractiveEnv(dir string) []string {
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env := append(os.Environ(),
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"GIT_EDITOR=true",
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"GIT_SEQUENCE_EDITOR=true",
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"GIT_TERMINAL_PROMPT=0",
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)
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// Mirror os/exec, which only injects PWD when Cmd.Env is nil, skips it on
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// these platforms, and absolutizes Cmd.Dir first (go.dev/issue/50599):
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// POSIX defines PWD as "an absolute pathname of the current working
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// directory". Injecting a relative dir verbatim (for example ".") poisons
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// every descendant that trusts PWD — macOS /bin/sh is bash 3.2, whose pwd
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// builtin reports "." when PWD="." leaks through git receive-pack into a
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// hook, which is how the post-receive hook of issue #269 ended up passing
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// `--gate .`.
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if dir != "" && runtime.GOOS != "windows" && runtime.GOOS != "plan9" {
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if abs, err := filepath.Abs(dir); err == nil {
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env = append(env, "PWD="+abs)
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}
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}
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return env
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}
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