Sam commands within Acme

[Deepanjan Kesh]

Hello all,

Let me preface my query by saying that I am relatively new to Acme and Sam, and hence there might be some trivial oversight on my part.

I use Mail in Acme and I want to insert an extra blank line between messages to make them a little more distinguishable. To achieve that, I am using the following command -

    Edit ,x/^[0-9]+\// .,/^[0-9]+\//- x/$\n/ c/\n\n/

Executing the command affects no change at all. I have tried the command

    Edit ,x/^[0-9]+\// .,/^[0-9]+\//- x/$\n/ p

and it prints the newlines, yet the 'c' command after that does not make the desired change.

Any help in this regard would be most appreciated.

Thank you,

Deepanjan Kesh

[Russ Cox]

I am not sure if perhaps acme Mail is eating the Edit commands somehow, but I doubt it.

There may or may not be something wrong with the regexp sequence; at first glance it's hard to tell.

A simpler approach might be:

    Edit ,s!(.\n)([0-9]+/)!\1\n\2!g

Best,

Russ

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[Deepanjan Kesh]

Dear Russ,

Thank you for your solution - it works. As I am still learning the tools of Plan9 from User Space, it would be nice if I can recognise the mistakes in my expression.

I had copied the text from the Mail window for experimentation to a normal text window, so, as you guessed, the Mail command is not interfering. The way I formulated the expression is as follows. I had printed what the commands are doing at each step and they seem to be doing exactly what they should.

1) I extract the mail identifiers using

    Edit ,x/^[0-9]+\// p

2) I, then, set dot to be the selection from the current mail identifier to the next identifier, sans the last line - this sets the dot to individual mail messages.

    Edit ,x/^[0-9]+\// .,/^[0-9]+\//- p

3) I, next, search for the newline at the end in the current text.

    Edit ,x/^[0-9]+\// .,/^[0-9]+\//- x/$\n/ p

4) Finally, I replace it by two newlines.

    Edit ,x/^[0-9]+\// .,/^[0-9]+\//- x/$\n/ c/\n\n/

If you can isolate my mistake, I really thank for your patience.

Thank you,
Deepanjan Kesh