t/lib-rebase.sh

   1 #!/bin/sh
   2
   3 # After setting the fake editor with this function, you can
   4 #
   5 # - override the commit message with $FAKE_COMMIT_MESSAGE
   6 # - amend the commit message with $FAKE_COMMIT_AMEND
   7 # - check that non-commit messages have a certain line count with $EXPECT_COUNT
   8 # - check the commit count in the commit message header with $EXPECT_HEADER_COUNT
   9 # - rewrite a rebase -i script as directed by $FAKE_LINES.
  10 #   $FAKE_LINES consists of a sequence of words separated by spaces.
  11 #   The following word combinations are possible:
  12 #
  13 #   "<lineno>" -- add a "pick" line with the SHA1 taken from the
  14 #       specified line.
  15 #
  16 #   "<cmd> <lineno>" -- add a line with the specified command
  17 #       ("squash", "fixup", "edit", or "reword") and the SHA1 taken
  18 #       from the specified line.
  19 #
  20 #   "#" -- Add a comment line.
  21 #
  22 #   ">" -- Add a blank line.
  23
  24 set_fake_editor () {
  25         echo "#!$SHELL_PATH" >fake-editor.sh
  26         cat >> fake-editor.sh <<\EOF
  27 case "$1" in
  28 */COMMIT_EDITMSG)
  29         test -z "$EXPECT_HEADER_COUNT" ||
  30                 test "$EXPECT_HEADER_COUNT" = "$(sed -n '1s/^# This is a combination of \(.*\) commits\./\1/p' < "$1")" ||
  31                 exit
  32         test -z "$FAKE_COMMIT_MESSAGE" || echo "$FAKE_COMMIT_MESSAGE" > "$1"
  33         test -z "$FAKE_COMMIT_AMEND" || echo "$FAKE_COMMIT_AMEND" >> "$1"
  34         exit
  35         ;;
  36 esac
  37 test -z "$EXPECT_COUNT" ||
  38         test "$EXPECT_COUNT" = $(sed -e '/^#/d' -e '/^$/d' < "$1" | wc -l) ||
  39         exit
  40 test -z "$FAKE_LINES" && exit
  41 grep -v '^#' < "$1" > "$1".tmp
  42 rm -f "$1"
  43 echo 'rebase -i script before editing:'
  44 cat "$1".tmp
  45 action=pick
  46 for line in $FAKE_LINES; do
  47         case $line in
  48         squash|fixup|edit|reword)
  49                 action="$line";;
  50         "#")
  51                 echo '# comment' >> "$1";;
  52         ">")
  53                 echo >> "$1";;
  54         *)
  55                 sed -n "${line}s/^pick/$action/p" < "$1".tmp >> "$1"
  56                 action=pick;;
  57         esac
  58 done
  59 echo 'rebase -i script after editing:'
  60 cat "$1"
  61 EOF
  62
  63         test_set_editor "$(pwd)/fake-editor.sh"
  64         chmod a+x fake-editor.sh
  65 }