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Refactor: simplify PrepareInteractiveRebaseCommand API

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Instead of passing a bunch of different options in
PrepareInteractiveRebaseCommandOpts, where it was unclear how they interact if
several are set, have only a single field "instruction" which can be set to one
of various different instructions.

The functionality of replacing the entire todo file with our own is no longer
available; it is only possible to prepend todos to the existing file.

Also, instead of using different env vars for the various rebase operations that
we want to tell the daemon to do, use a single one that contains a json-encoded
struct with all available instructions. This makes the protocol much clearer,
and makes it easier to extend in the future.
This commit is contained in:
Stefan Haller
2023-04-06 11:13:42 +02:00
parent dad7a70bf8
commit a8586ba57e
4 changed files with 142 additions and 134 deletions
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108
pkg/app/daemon/daemon.go
View File

@@ -1,8 +1,7 @@
package daemon
import (
"fmt"
"io"
"encoding/json"
"log"
"os"
"path/filepath"
@@ -32,39 +31,39 @@ const (
const (
DaemonKindEnvKey string = "LAZYGIT_DAEMON_KIND"
RebaseTODOEnvKey string = "LAZYGIT_REBASE_TODO"
// The `PrependLinesEnvKey` env variable is set to `true` to tell our daemon
// to prepend the content of `RebaseTODOEnvKey` to the default `git-rebase-todo`
// file instead of using it as a replacement.
PrependLinesEnvKey string = "LAZYGIT_PREPEND_LINES"
// Contains a json-encoded instance of the InteractiveRebaseInstructions struct
InteractiveRebaseInstructionsEnvKey string = "LAZYGIT_DAEMON_INSTRUCTIONS"
)
// If this is set, it tells lazygit to read the original todo file, and
// change the action for one or more entries in it. The value of the variable
// will have one or more lines of the form "Sha1:newAction", e.g.
// a02b54e1b7e7e8dd8bc1958c11ef4ee4df459ea4:edit
// Exactly one of the fields in this struct is expected to be non-empty
type InteractiveRebaseInstructions struct {
// If this is non-empty, this string is prepended to the git-rebase-todo
// file. The string is expected to have newlines at the end of each line.
LinesToPrependToRebaseTODO string
// If this is non-empty, it tells lazygit to read the original todo file, and
// change the action for one or more entries in it.
// The existing action of the todo to be changed is expected to be "pick".
//
// If this is used, the value of RebaseTODOEnvKey must be empty.
ChangeTodoActionEnvKey string = "LAZYGIT_CHANGE_TODO_ACTION"
ChangeTodoActions []ChangeTodoAction
// Can be set to the sha of a "pick" todo that will be moved down by one.
MoveTodoDownEnvKey string = "LAZYGIT_MOVE_COMMIT_DOWN"
ShaToMoveDown string
// Can be set to the sha of a "pick" todo that will be moved up by one.
MoveTodoUpEnvKey string = "LAZYGIT_MOVE_COMMIT_UP"
)
ShaToMoveUp string
}
type ChangeTodoAction struct {
Sha string
NewAction todo.TodoCommand
}
type Daemon interface {
Run() error
}
var logFile io.StringWriter
func Handle(common *common.Common) {
logFile, _ = os.Create("/tmp/daemon-log.txt")
_, _ = logFile.WriteString("Hello Daemon\n")
d := getDaemon(common)
if d == nil {
return
@@ -118,43 +117,30 @@ func (self *rebaseDaemon) Run() error {
}
func (self *rebaseDaemon) writeTodoFile(path string) error {
if changeTodoActionEnvValue := os.Getenv(ChangeTodoActionEnvKey); changeTodoActionEnvValue != "" {
return self.changeTodoAction(path, changeTodoActionEnvValue)
} else if shaToMoveDown := os.Getenv(MoveTodoDownEnvKey); shaToMoveDown != "" {
_, _ = logFile.WriteString(fmt.Sprintf("Moving commit down: %s\n", shaToMoveDown))
return utils.MoveTodoDown(path, shaToMoveDown, todo.Pick)
} else if shaToMoveUp := os.Getenv(MoveTodoUpEnvKey); shaToMoveUp != "" {
_, _ = logFile.WriteString(fmt.Sprintf("Moving commit up: %s\n", shaToMoveUp))
return utils.MoveTodoUp(path, shaToMoveUp, todo.Pick)
} else {
todoContent := []byte(os.Getenv(RebaseTODOEnvKey))
prependLines := os.Getenv(PrependLinesEnvKey) != ""
if prependLines {
existingContent, err := os.ReadFile(path)
if err != nil {
return err
}
todoContent = append(todoContent, existingContent...)
}
return os.WriteFile(path, todoContent, 0o644)
jsonData := os.Getenv(InteractiveRebaseInstructionsEnvKey)
instructions := InteractiveRebaseInstructions{}
err := json.Unmarshal([]byte(jsonData), &instructions)
if err != nil {
return err
}
if instructions.LinesToPrependToRebaseTODO != "" {
return utils.PrependStrToTodoFile(path, []byte(instructions.LinesToPrependToRebaseTODO))
} else if len(instructions.ChangeTodoActions) != 0 {
return self.changeTodoAction(path, instructions.ChangeTodoActions)
} else if instructions.ShaToMoveDown != "" {
return utils.MoveTodoDown(path, instructions.ShaToMoveDown, todo.Pick)
} else if instructions.ShaToMoveUp != "" {
return utils.MoveTodoUp(path, instructions.ShaToMoveUp, todo.Pick)
}
self.c.Log.Error("No instructions were given to daemon")
return nil
}
func (self *rebaseDaemon) changeTodoAction(path string, changeTodoActionEnvValue string) error {
lines := strings.Split(changeTodoActionEnvValue, "\n")
for _, line := range lines {
fields := strings.Split(line, ":")
if len(fields) != 2 {
return fmt.Errorf("Unexpected value for %s: %s", ChangeTodoActionEnvKey, changeTodoActionEnvValue)
}
sha, newAction := fields[0], self.actionFromString(fields[1])
if int(newAction) == 0 {
return fmt.Errorf("Unknown action in %s", changeTodoActionEnvValue)
}
if err := utils.EditRebaseTodo(path, sha, todo.Pick, newAction); err != nil {
func (self *rebaseDaemon) changeTodoAction(path string, changeTodoActions []ChangeTodoAction) error {
for _, c := range changeTodoActions {
if err := utils.EditRebaseTodo(path, c.Sha, todo.Pick, c.NewAction); err != nil {
return err
}
}
@@ -162,16 +148,6 @@ func (self *rebaseDaemon) changeTodoAction(path string, changeTodoActionEnvValue
return nil
}
func (self *rebaseDaemon) actionFromString(actionString string) todo.TodoCommand {
for t := todo.Pick; t < todo.Comment; t++ {
if t.String() == actionString {
return t
}
}
return 0
}
func gitDir() string {
dir := env.GetGitDirEnv()
if dir == "" {