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package commands
import (
"os"
"github.com/git-lfs/git-lfs/v3/git"
"github.com/git-lfs/git-lfs/v3/locking"
"github.com/git-lfs/git-lfs/v3/tr"
"github.com/rubyist/tracerx"
"github.com/spf13/cobra"
)
// postCheckoutCommand is run through Git's post-checkout hook. The hook passes
// up to 3 arguments on the command line:
//
// 1. SHA of previous commit before the checkout
// 2. SHA of commit just checked out
// 3. Flag ("0" or "1") - 1 if a branch/tag/SHA was checked out, 0 if a file was
// In the case of a file being checked out, the pre/post SHA are the same
//
// This hook checks that files which are lockable and not locked are made read-only,
// optimising that as best it can based on the available information.
func postCheckoutCommand(cmd *cobra.Command, args []string) {
if len(args) != 3 {
Print(tr.Tr.Get("This should be run through Git's post-checkout hook. Run `git lfs update` to install it."))
os.Exit(1)
}
// Skip entire hook if lockable read only feature is disabled
if !cfg.SetLockableFilesReadOnly() {
os.Exit(0)
}
requireGitVersion()
lockClient := newLockClient()
// Skip this hook if no lockable patterns have been configured
if len(lockClient.GetLockablePatterns()) == 0 {
os.Exit(0)
}
if args[2] == "1" && args[0] != "0000000000000000000000000000000000000000" {
postCheckoutRevChange(lockClient, args[0], args[1])
} else {
postCheckoutFileChange(lockClient)
}
}
func postCheckoutRevChange(client *locking.Client, pre, post string) {
tracerx.Printf("post-checkout: changes between %v and %v", pre, post)
// We can speed things up by looking at the difference between previous HEAD
// and current HEAD, and only checking lockable files that are different
files, err := git.GetFilesChanged(pre, post)
if err != nil {
LoggedError(err, "%s\n%s", tr.Tr.Get("Warning: post-checkout rev diff %v:%v failed: %v", pre, post, err), tr.Tr.Get("Falling back on full scan."))
postCheckoutFileChange(client)
}
tracerx.Printf("post-checkout: checking write flags on %v", files)
err = client.FixLockableFileWriteFlags(files)
if err != nil {
LoggedError(err, tr.Tr.Get("Warning: post-checkout locked file check failed: %v", err))
}
}
func postCheckoutFileChange(client *locking.Client) {
tracerx.Printf("post-checkout: checking write flags for all lockable files")
// Sadly we don't get any information about what files were checked out,
// so we have to check the entire repo
err := client.FixAllLockableFileWriteFlags()
if err != nil {
LoggedError(err, tr.Tr.Get("Warning: post-checkout locked file check failed: %v", err))
}
}
func init() {
RegisterCommand("post-checkout", postCheckoutCommand, nil)
}
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