/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "utf-conv.h"
#include "path.h"
#include "findfile.h"
#define REG_MSYSGIT_INSTALL_LOCAL L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\Git_is1"
#ifndef _WIN64
#define REG_MSYSGIT_INSTALL REG_MSYSGIT_INSTALL_LOCAL
#else
#define REG_MSYSGIT_INSTALL L"SOFTWARE\\Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\Git_is1"
#endif
int git_win32__expand_path(struct git_win32__path *s_root, const wchar_t *templ)
{
s_root->len = ExpandEnvironmentStringsW(templ, s_root->path, MAX_PATH);
return s_root->len ? 0 : -1;
}
static int win32_path_utf16_to_8(git_buf *path_utf8, const wchar_t *path_utf16)
{
char temp_utf8[GIT_PATH_MAX];
git__utf16_to_8(temp_utf8, path_utf16);
git_path_mkposix(temp_utf8);
return git_buf_sets(path_utf8, temp_utf8);
}
int git_win32__find_file(
git_buf *path, const struct git_win32__path *root, const char *filename)
{
size_t len, alloc_len;
wchar_t *file_utf16 = NULL;
if (!root || !filename || (len = strlen(filename)) == 0)
return GIT_ENOTFOUND;
/* allocate space for wchar_t path to file */
alloc_len = root->len + len + 2;
file_utf16 = git__calloc(alloc_len, sizeof(wchar_t));
GITERR_CHECK_ALLOC(file_utf16);
/* append root + '\\' + filename as wchar_t */
memcpy(file_utf16, root->path, root->len * sizeof(wchar_t));
if (*filename == '/' || *filename == '\\')
filename++;
git__utf8_to_16(file_utf16 + root->len - 1, alloc_len, filename);
/* check access */
if (_waccess(file_utf16, F_OK) < 0) {
git__free(file_utf16);
return GIT_ENOTFOUND;
}
win32_path_utf16_to_8(path, file_utf16);
git__free(file_utf16);
return 0;
}
static wchar_t* win32_walkpath(wchar_t *path, wchar_t *buf, size_t buflen)
{
wchar_t term, *base = path;
assert(path && buf && buflen);
term = (*path == L'"') ? *path++ : L';';
for (buflen--; *path && *path != term && buflen; buflen--)
*buf++ = *path++;
*buf = L'\0'; /* reserved a byte via initial subtract */
while (*path == term || *path == L';')
path++;
return (path != base) ? path : NULL;
}
static int win32_find_git_in_path(git_buf *buf, const wchar_t *gitexe)
{
wchar_t *env = _wgetenv(L"PATH"), lastch;
struct git_win32__path root;
size_t gitexe_len = wcslen(gitexe);
if (!env)
return -1;
while ((env = win32_walkpath(env, root.path, MAX_PATH-1)) && *root.path) {
root.len = (DWORD)wcslen(root.path);
lastch = root.path[root.len - 1];
/* ensure trailing slash (MAX_PATH-1 to walkpath guarantees space) */
if (lastch != L'/' && lastch != L'\\') {
root.path[root.len++] = L'\\';
root.path[root.len] = L'\0';
}
if (root.len + gitexe_len >= MAX_PATH)
continue;
wcscpy(&root.path[root.len], gitexe);
if (_waccess(root.path, F_OK) == 0 && root.len > 5) {
/* replace "bin\\" or "cmd\\" with "etc\\" */
wcscpy(&root.path[root.len - 4], L"etc\\");
win32_path_utf16_to_8(buf, root.path);
return 0;
}
}
return GIT_ENOTFOUND;
}
static int win32_find_git_in_registry(
git_buf *buf, const HKEY hieve, const wchar_t *key)
{
HKEY hKey;
DWORD dwType = REG_SZ;
struct git_win32__path path16;
assert(buf);
path16.len = 0;
if (RegOpenKeyExW(hieve, key, 0, KEY_ALL_ACCESS, &hKey) == ERROR_SUCCESS) {
if (RegQueryValueExW(hKey, L"InstallLocation", NULL, &dwType,
(LPBYTE)&path16.path, &path16.len) == ERROR_SUCCESS)
{
/* InstallLocation points to the root of the git directory */
if (path16.len + 4 > MAX_PATH) { /* 4 = wcslen(L"etc\\") */
giterr_set(GITERR_OS, "Cannot locate git - path too long");
return -1;
}
wcscat(path16.path, L"etc\\");
path16.len += 4;
win32_path_utf16_to_8(buf, path16.path);
}
RegCloseKey(hKey);
}
return path16.len ? 0 : GIT_ENOTFOUND;
}
static int win32_find_existing_dirs(
git_buf *out, const wchar_t *tmpl[], char *temp[])
{
struct git_win32__path path16;
git_buf buf = GIT_BUF_INIT;
git_buf_clear(out);
for (; *tmpl != NULL; tmpl++) {
if (!git_win32__expand_path(&path16, *tmpl) &&
path16.path[0] != L'%' &&
!_waccess(path16.path, F_OK))
{
win32_path_utf16_to_8(&buf, path16.path);
if (buf.size)
git_buf_join(out, GIT_PATH_LIST_SEPARATOR, out->ptr, buf.ptr);
}
}
git_buf_free(&buf);
return (git_buf_oom(out) ? -1 : 0);
}
int git_win32__find_system_dirs(git_buf *out)
{
git_buf buf = GIT_BUF_INIT;
/* directories where git.exe & git.cmd are found */
if (!win32_find_git_in_path(&buf, L"git.exe") && buf.size)
git_buf_set(out, buf.ptr, buf.size);
else
git_buf_clear(out);
if (!win32_find_git_in_path(&buf, L"git.cmd") && buf.size)
git_buf_join(out, GIT_PATH_LIST_SEPARATOR, out->ptr, buf.ptr);
/* directories where git is installed according to registry */
if (!win32_find_git_in_registry(
&buf, HKEY_CURRENT_USER, REG_MSYSGIT_INSTALL_LOCAL) && buf.size)
git_buf_join(out, GIT_PATH_LIST_SEPARATOR, out->ptr, buf.ptr);
if (!win32_find_git_in_registry(
&buf, HKEY_LOCAL_MACHINE, REG_MSYSGIT_INSTALL) && buf.size)
git_buf_join(out, GIT_PATH_LIST_SEPARATOR, out->ptr, buf.ptr);
git_buf_free(&buf);
return (git_buf_oom(out) ? -1 : 0);
}
int git_win32__find_global_dirs(git_buf *out)
{
char *temp[3];
static const wchar_t *global_tmpls[4] = {
L"%HOME%\\",
L"%HOMEDRIVE%%HOMEPATH%\\",
L"%USERPROFILE%\\",
NULL,
};
return win32_find_existing_dirs(out, global_tmpls, temp);
}
int git_win32__find_xdg_dirs(git_buf *out)
{
char *temp[6];
static const wchar_t *global_tmpls[7] = {
L"%XDG_CONFIG_HOME%\\git",
L"%APPDATA%\\git",
L"%LOCALAPPDATA%\\git",
L"%HOME%\\.config\\git",
L"%HOMEDRIVE%%HOMEPATH%\\.config\\git",
L"%USERPROFILE%\\.config\\git",
NULL,
};
return win32_find_existing_dirs(out, global_tmpls, temp);
}
