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Sincef67b45f862(Introduce trivial new pager.c helper infrastructure, 2006-02-28) we have the machinery to send our output to a pager. That machinery, once set up, does not allow us to regain the original stdio streams. In the interactive commands (i.e.: add -p) we want to use the pager for some output, while maintaining the interaction with the user. Modify the pager machinery so that we can use `setup_pager()` and, once we've finished sending the desired output for the pager, wait for the pager termination using a new function `wait_for_pager()`. Make this function reset the pager machinery before returning. One specific point to note is that we avoid forking the pager in `setup_pager()` if the configured pager is an empty string [*1*] or simply "cat" [*2*]. In these cases, `setup_pager()` does nothing and therefore `wait_for_pager()` should not be called. We could modify `setup_pager()` to return an indication of these situations, so we could avoid calling `wait_for_pager()`. However, let's avoid transferring that responsibility to the caller and instead treat the call to `wait_for_pager()` as a no-op when we know we haven't forked the pager. 1.-402461aab1(pager: do not fork a pager if PAGER is set to empty., 2006-04-16) 2.-caef71a535(Do not fork PAGER=cat, 2006-04-16) Signed-off-by: Rubén Justo <rjusto@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
19 lines
415 B
C
19 lines
415 B
C
#ifndef PAGER_H
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#define PAGER_H
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struct child_process;
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const char *git_pager(int stdout_is_tty);
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void setup_pager(void);
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void wait_for_pager(void);
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int pager_in_use(void);
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int term_columns(void);
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void term_clear_line(void);
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int decimal_width(uintmax_t);
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int check_pager_config(const char *cmd);
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void prepare_pager_args(struct child_process *, const char *pager);
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extern int pager_use_color;
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#endif /* PAGER_H */
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