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cad3a2056d
It was very unfortunate that we added core.pager setting to the configuration file; even when the underlying command does not care if there is no git repository is involved (think "git diff --no-index"), the user would now rightfully want the configuration setting to be honored, which means we would need to read the configuration file before we launch the pager. This is a minimum change in the sense that it restores the old behaviour of not even reading config in setup_git_directory(), but have the core.pager honored when we know it matters. Note that this does not cover "git -p --git-dir where command"; the -p option immediately trigger the pager settings before we even see --git-dir to learn where the configuration file is, so we will end up reading the configuration from the place where we would _normally_ find the git repository. Signed-off-by: Junio C Hamano <gitster@pobox.com>
75 lines
1.2 KiB
C
75 lines
1.2 KiB
C
#include "cache.h"
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#include <sys/select.h>
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/*
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* This is split up from the rest of git so that we might do
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* something different on Windows, for example.
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*/
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static void run_pager(const char *pager)
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{
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/*
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* Work around bug in "less" by not starting it until we
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* have real input
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*/
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fd_set in;
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FD_ZERO(&in);
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FD_SET(0, &in);
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select(1, &in, NULL, &in, NULL);
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execlp(pager, pager, NULL);
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execl("/bin/sh", "sh", "-c", pager, NULL);
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}
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void setup_pager(void)
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{
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pid_t pid;
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int fd[2];
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const char *pager = getenv("GIT_PAGER");
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if (!isatty(1))
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return;
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if (!pager) {
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if (!pager_program)
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git_config(git_default_config);
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pager = pager_program;
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}
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if (!pager)
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pager = getenv("PAGER");
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if (!pager)
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pager = "less";
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else if (!*pager || !strcmp(pager, "cat"))
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return;
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pager_in_use = 1; /* means we are emitting to terminal */
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if (pipe(fd) < 0)
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return;
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pid = fork();
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if (pid < 0) {
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close(fd[0]);
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close(fd[1]);
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return;
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}
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/* return in the child */
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if (!pid) {
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dup2(fd[1], 1);
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close(fd[0]);
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close(fd[1]);
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return;
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}
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/* The original process turns into the PAGER */
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dup2(fd[0], 0);
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close(fd[0]);
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close(fd[1]);
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setenv("LESS", "FRSX", 0);
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run_pager(pager);
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die("unable to execute pager '%s'", pager);
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exit(255);
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}
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