diff options
Diffstat (limited to 'git.c')
| -rw-r--r-- | git.c | 127 |
1 files changed, 123 insertions, 4 deletions
@@ -10,6 +10,7 @@ #include <stdarg.h> #include "git-compat-util.h" #include "exec_cmd.h" +#include "cache.h" #include "builtin.h" @@ -32,6 +33,113 @@ static void prepend_to_path(const char *dir, int len) setenv("PATH", path, 1); } +static const char *alias_command; +static char *alias_string = NULL; + +static int git_alias_config(const char *var, const char *value) +{ + if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) { + alias_string = strdup(value); + } + return 0; +} + +static int split_cmdline(char *cmdline, const char ***argv) +{ + int src, dst, count = 0, size = 16; + char quoted = 0; + + *argv = malloc(sizeof(char*) * size); + + /* split alias_string */ + (*argv)[count++] = cmdline; + for (src = dst = 0; cmdline[src];) { + char c = cmdline[src]; + if (!quoted && isspace(c)) { + cmdline[dst++] = 0; + while (cmdline[++src] + && isspace(cmdline[src])) + ; /* skip */ + if (count >= size) { + size += 16; + *argv = realloc(*argv, sizeof(char*) * size); + } + (*argv)[count++] = cmdline + dst; + } else if(!quoted && (c == '\'' || c == '"')) { + quoted = c; + src++; + } else if (c == quoted) { + quoted = 0; + src++; + } else { + if (c == '\\' && quoted != '\'') { + src++; + c = cmdline[src]; + if (!c) { + free(*argv); + *argv = NULL; + return error("cmdline ends with \\"); + } + } + cmdline[dst++] = c; + src++; + } + } + + cmdline[dst] = 0; + + if (quoted) { + free(*argv); + *argv = NULL; + return error("unclosed quote"); + } + + return count; +} + +static int handle_alias(int *argcp, const char ***argv) +{ + int nongit = 0, ret = 0; + const char *subdir; + + subdir = setup_git_directory_gently(&nongit); + if (!nongit) { + int count; + const char** new_argv; + + alias_command = (*argv)[0]; + git_config(git_alias_config); + if (alias_string) { + + count = split_cmdline(alias_string, &new_argv); + + if (count < 1) + die("empty alias for %s", alias_command); + + if (!strcmp(alias_command, new_argv[0])) + die("recursive alias: %s", alias_command); + + /* insert after command name */ + if (*argcp > 1) { + new_argv = realloc(new_argv, sizeof(char*) * + (count + *argcp - 1)); + memcpy(new_argv + count, *argv, sizeof(char*) * + (*argcp - 1)); + } + + *argv = new_argv; + *argcp += count - 1; + + ret = 1; + } + } + + if (subdir) + chdir(subdir); + + return ret; +} + const char git_version_string[] = GIT_VERSION; static void handle_internal_command(int argc, const char **argv, char **envp) @@ -94,6 +202,7 @@ int main(int argc, const char **argv, char **envp) char *slash = strrchr(cmd, '/'); char git_command[PATH_MAX + 1]; const char *exec_path = NULL; + int done_alias = 0; /* * Take the basename of argv[0] as the command @@ -178,11 +287,21 @@ int main(int argc, const char **argv, char **envp) exec_path = git_exec_path(); prepend_to_path(exec_path, strlen(exec_path)); - /* See if it's an internal command */ - handle_internal_command(argc, argv, envp); + while (1) { + /* See if it's an internal command */ + handle_internal_command(argc, argv, envp); - /* .. then try the external ones */ - execv_git_cmd(argv); + /* .. then try the external ones */ + execv_git_cmd(argv); + + /* It could be an alias -- this works around the insanity + * of overriding "git log" with "git show" by having + * alias.log = show + */ + if (done_alias || !handle_alias(&argc, &argv)) + break; + done_alias = 1; + } if (errno == ENOENT) cmd_usage(0, exec_path, "'%s' is not a git-command", cmd); |