Support GIT_PAGER_IN_USE environment variable
When deciding whether or not to turn on automatic color support, git_config_colorbool checks whether stdout is a tty. However, because we run a pager, if stdout is not a tty, we must check whether it is because we started the pager. This used to be done by checking the pager_in_use variable. This variable was set only when the git program being run started the pager; there was no way for an external program running git indicate that it had already started a pager. This patch allows a program to set GIT_PAGER_IN_USE to a true value to indicate that even though stdout is not a tty, it is because a pager is being used. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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parent
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2
cache.h
2
cache.h
@ -608,7 +608,7 @@ extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char
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/* pager.c */
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extern void setup_pager(void);
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extern char *pager_program;
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extern int pager_in_use;
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extern int pager_in_use(void);
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extern int pager_use_color;
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extern char *editor_program;
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2
color.c
2
color.c
@ -135,7 +135,7 @@ int git_config_colorbool(const char *var, const char *value, int stdout_is_tty)
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auto_color:
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if (stdout_is_tty < 0)
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stdout_is_tty = isatty(1);
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if (stdout_is_tty || (pager_in_use && pager_use_color)) {
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if (stdout_is_tty || (pager_in_use() && pager_use_color)) {
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char *term = getenv("TERM");
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if (term && strcmp(term, "dumb"))
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return 1;
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@ -31,7 +31,6 @@ size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
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size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
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size_t delta_base_cache_limit = 16 * 1024 * 1024;
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char *pager_program;
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int pager_in_use;
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int pager_use_color = 1;
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char *editor_program;
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char *excludes_file;
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15
pager.c
15
pager.c
@ -5,6 +5,8 @@
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* something different on Windows, for example.
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*/
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static int spawned_pager;
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static void run_pager(const char *pager)
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{
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/*
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@ -41,7 +43,7 @@ void setup_pager(void)
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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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spawned_pager = 1; /* means we are emitting to terminal */
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if (pipe(fd) < 0)
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return;
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@ -70,3 +72,14 @@ void setup_pager(void)
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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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int pager_in_use(void)
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{
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const char *env;
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if (spawned_pager)
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return 1;
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env = getenv("GIT_PAGER_IN_USE");
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return env ? git_config_bool("GIT_PAGER_IN_USE", env) : 0;
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}
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