[PATCH] Add git-var a tool for reading interesting git variables.
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>
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Documentation/git-var.txt
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Documentation/git-var.txt
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git-var(1)
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==================
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v0.1, July 2005
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NAME
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----
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git-var - Print the git users identity
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SYNOPSIS
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--------
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git-var [ -l | <variable> ]
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DESCRIPTION
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-----------
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Prints a git logical variable.
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-l causes the logical variables to be listed.
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EXAMPLE
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--------
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$git-var GIT_AUTHOR_IDENT
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Eric W. Biederman <ebiederm@lnxi.com> 1121223278 -0600
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VARIABLES
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----------
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GIT_AUTHOR_IDENT
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The author of a piece of code.
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GIT_COMMITTER_IDENT
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The person who put a piece of code into git.
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Diagnostics
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-----------
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You don't exist. Go away!::
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The passwd(5) gecos field couldn't be read
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Your parents must have hated you!::
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The password(5) gecos field is longer than a giant static buffer.
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Your sysadmin must hate you!::
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The password(5) name field is longer than a giant static buffer.
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See Also
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--------
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link:git-commit-tree.html[git-commit-tree]
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link:git-tag-script.html[git-tag-script]
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Author
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------
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Written by Eric Biederman <ebiederm@xmission.com>
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Documentation
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--------------
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Documentation by Eric Biederman and the git-list <git@vger.kernel.org>.
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GIT
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---
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Part of the link:git.html[git] suite
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@ -111,6 +111,9 @@ link:git-tar-tree.html[git-tar-tree]::
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link:git-unpack-file.html[git-unpack-file]::
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Creates a temporary file with a blob's contents
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link:git-var.html[git-var]::
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Displays a git logical variable
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link:git-verify-pack.html[git-verify-pack]::
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Validates packed GIT archive files
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3
Makefile
3
Makefile
@ -48,7 +48,7 @@ PROG= git-update-cache git-diff-files git-init-db git-write-tree \
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git-diff-stages git-rev-parse git-patch-id git-pack-objects \
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git-unpack-objects git-verify-pack git-receive-pack git-send-pack \
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git-prune-packed git-fetch-pack git-upload-pack git-clone-pack \
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git-show-index git-daemon
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git-show-index git-daemon git-var
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all: $(PROG)
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@ -148,6 +148,7 @@ git-receive-pack: receive-pack.c
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git-send-pack: send-pack.c
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git-prune-packed: prune-packed.c
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git-fetch-pack: fetch-pack.c
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git-var: var.c
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git-http-pull: LIBS += -lcurl
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git-rev-list: LIBS += -lssl
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65
var.c
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65
var.c
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/*
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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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