Re: [PATCH] t/lib-rebase.sh: support explicit 'pick' commands in 'fake_editor.sh'

> The verbose output of the test 'reword without issues functions as
> intended' in 't3423-rebase-reword.sh', added in a9279c6785 (sequencer:
> do not squash 'reword' commits when we hit conflicts, 2018-06-19),
> contains the following error output:
> 
>   sed: -e expression #1, char 2: extra characters after command
> 
> This error comes from within the 'fake-editor.sh' script created by
> 'lib-rebase.sh's set_fake_editor() function, and the root cause is the
> FAKE_LINES="pick 1 reword 2" variable in the test in question, in
> particular the "pick" word.  'fake-editor.sh' assumes 'pick' to be the
> default rebase command and doesn't support an explicit 'pick' command
> in FAKE_LINES.  As a result, 'pick' will be used instead of a line
> number when assembling the following 'sed' script:
> 
>   sed -n picks/^pick/pick/p
> 
> which triggers the aforementioned error.
> 
> Luckily, this didn't affect the test's correctness: the erroring 'sed'
> command doesn't write anything to the todo script, and processing the
> rest of FAKE_LINES generates the desired todo script, as if that
> 'pick' command were not there at all.
> 
> The minimal fix would be to remove the 'pick' word from FAKE_LINES,
> but that would leave us susceptible to similar issues in the future.
> 
> Instead, teach the fake-editor script to recognize an explicit 'pick'
> command, which is still a fairly trivial change.
> 
> In the future we might want to consider reinforcing this fake editor
> script with an &&-chain and stricter parsing of the FAKE_LINES
> variable (e.g. to error out when encountering unknown rebase commands
> or commands and line numbers in the wrong order).
> 
> Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>

> ---
>  t/lib-rebase.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/t/lib-rebase.sh b/t/lib-rebase.sh
> index 25a77ee5cb..592865d019 100644
> --- a/t/lib-rebase.sh
> +++ b/t/lib-rebase.sh
> @@ -47,7 +47,7 @@ set_fake_editor () {
>  	action=pick
>  	for line in $FAKE_LINES; do
>  		case $line in
> -		squash|fixup|edit|reword|drop)
> +		pick|squash|fixup|edit|reword|drop)
>  			action="$line";;
>  		exec*)
>  			echo "$line" | sed 's/_/ /g' >> "$1";;
> -- 
> 2.19.0.rc0.136.gd2dd172e64
> 
>