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 #   $FAKE_LINES consists of a sequence of words separated by spaces.
  11 #   The following word combinations are possible:
  12 #
  13 #   "<lineno>" -- add a "pick" line with the SHA1 taken from the
  14 #       specified line.
  15 #
  16 #   "<cmd> <lineno>" -- add a line with the specified command
  17 #       ("squash", "fixup", "edit", or "reword") and the SHA1 taken
  18 #       from the specified line.
  19 #
  20 #   "exec_cmd_with_args" -- add an "exec cmd with args" line.
  21 #
  22 #   "#" -- Add a comment line.
  23 #
  24 #   ">" -- Add a blank line.
  25
  26 set_fake_editor () {
  27         echo "#!$SHELL_PATH" >fake-editor.sh
  28         cat >> fake-editor.sh <<\EOF
  29 case "$1" in
  30 */COMMIT_EDITMSG)
  31         test -z "$EXPECT_HEADER_COUNT" ||
  32                 test "$EXPECT_HEADER_COUNT" = "$(sed -n '1s/^# This is a combination of \(.*\) commits\./\1/p' < "$1")" ||
  33                 exit
  34         test -z "$FAKE_COMMIT_MESSAGE" || echo "$FAKE_COMMIT_MESSAGE" > "$1"
  35         test -z "$FAKE_COMMIT_AMEND" || echo "$FAKE_COMMIT_AMEND" >> "$1"
  36         exit
  37         ;;
  38 esac
  39 test -z "$EXPECT_COUNT" ||
  40         test "$EXPECT_COUNT" = $(sed -e '/^#/d' -e '/^$/d' < "$1" | wc -l) ||
  41         exit
  42 test -z "$FAKE_LINES" && exit
  43 grep -v '^#' < "$1" > "$1".tmp
  44 rm -f "$1"
  45 echo 'rebase -i script before editing:'
  46 cat "$1".tmp
  47 action=pick
  48 for line in $FAKE_LINES; do
  49         case $line in
  50         squash|fixup|edit|reword)
  51                 action="$line";;
  52         exec*)
  53                 echo "$line" | sed 's/_/ /g' >> "$1";;
  54         "#")
  55                 echo '# comment' >> "$1";;
  56         ">")
  57                 echo >> "$1";;
  58         *)
  59                 sed -n "${line}s/^pick/$action/p" < "$1".tmp >> "$1"
  60                 action=pick;;
  61         esac
  62 done
  63 echo 'rebase -i script after editing:'
  64 cat "$1"
  65 EOF
  66
  67         test_set_editor "$(pwd)/fake-editor.sh"
  68         chmod a+x fake-editor.sh
  69 }