86 lines
2.6 KiB
Go
86 lines
2.6 KiB
Go
package cmdutil
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import (
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"net/http"
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"os"
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"path/filepath"
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"strings"
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"github.com/cli/cli/v2/context"
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"github.com/cli/cli/v2/internal/config"
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"github.com/cli/cli/v2/internal/ghrepo"
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"github.com/cli/cli/v2/pkg/extensions"
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"github.com/cli/cli/v2/pkg/iostreams"
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)
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type Browser interface {
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Browse(string) error
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}
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type Factory struct {
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IOStreams *iostreams.IOStreams
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Browser Browser
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HttpClient func() (*http.Client, error)
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BaseRepo func() (ghrepo.Interface, error)
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Remotes func() (context.Remotes, error)
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Config func() (config.Config, error)
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Branch func() (string, error)
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ExtensionManager extensions.ExtensionManager
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ExecutableName string
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}
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// Executable is the path to the currently invoked binary
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func (f *Factory) Executable() string {
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if !strings.ContainsRune(f.ExecutableName, os.PathSeparator) {
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f.ExecutableName = executable(f.ExecutableName)
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}
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return f.ExecutableName
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}
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// Finds the location of the executable for the current process as it's found in PATH, respecting symlinks.
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// If the process couldn't determine its location, return fallbackName. If the executable wasn't found in
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// PATH, return the absolute location to the program.
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//
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// The idea is that the result of this function is callable in the future and refers to the same
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// installation of gh, even across upgrades. This is needed primarily for Homebrew, which installs software
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// under a location such as `/usr/local/Cellar/gh/1.13.1/bin/gh` and symlinks it from `/usr/local/bin/gh`.
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// When the version is upgraded, Homebrew will often delete older versions, but keep the symlink. Because of
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// this, we want to refer to the `gh` binary as `/usr/local/bin/gh` and not as its internal Homebrew
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// location.
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//
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// None of this would be needed if we could just refer to GitHub CLI as `gh`, i.e. without using an absolute
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// path. However, for some reason Homebrew does not include `/usr/local/bin` in PATH when it invokes git
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// commands to update its taps. If `gh` (no path) is being used as git credential helper, as set up by `gh
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// auth login`, running `brew update` will print out authentication errors as git is unable to locate
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// Homebrew-installed `gh`.
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func executable(fallbackName string) string {
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exe, err := os.Executable()
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if err != nil {
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return fallbackName
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}
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base := filepath.Base(exe)
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path := os.Getenv("PATH")
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for _, dir := range filepath.SplitList(path) {
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p, err := filepath.Abs(filepath.Join(dir, base))
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if err != nil {
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continue
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}
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f, err := os.Stat(p)
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if err != nil {
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continue
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}
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if p == exe {
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return p
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} else if f.Mode()&os.ModeSymlink != 0 {
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if t, err := os.Readlink(p); err == nil && t == exe {
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return p
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}
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}
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}
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return exe
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}
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