mirror of
https://github.com/git/git.git
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aed022ab4c
Sharing code between shell scripts and C is a challenge. The program git-var allows us to have a set of named values that a shell script can interrogate and a normal C program can simply call the functions that compute them. Allowing sharing when computing plain test values. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
66 lines
1.1 KiB
C
66 lines
1.1 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Eric Biederman, 2005
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*/
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#include "cache.h"
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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static char *var_usage = "git-var [-l | <variable>]";
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struct git_var {
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const char *name;
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char *(*read)(void);
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};
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static struct git_var git_vars[] = {
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{ "GIT_COMMITTER_IDENT", git_committer_info },
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{ "GIT_AUTHOR_IDENT", git_author_info },
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{ "", NULL },
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};
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static void list_vars(void)
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{
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struct git_var *ptr;
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for(ptr = git_vars; ptr->read; ptr++) {
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printf("%s=%s\n", ptr->name, ptr->read());
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}
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}
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static const char *read_var(const char *var)
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{
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struct git_var *ptr;
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const char *val;
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val = NULL;
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for(ptr = git_vars; ptr->read; ptr++) {
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if (strcmp(var, ptr->name) == 0) {
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val = ptr->read();
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break;
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}
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}
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return val;
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}
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int main(int argc, char **argv)
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{
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const char *val;
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if (argc != 2) {
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usage(var_usage);
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}
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setup_ident();
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val = NULL;
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if (strcmp(argv[1], "-l") == 0) {
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list_vars();
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return 0;
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}
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val = read_var(argv[1]);
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if (!val)
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usage(var_usage);
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printf("%s\n", val);
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return 0;
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}
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