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Find git installations based on %PATH%

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Signed-off-by: Sven Strickroth <email@cs-ware.de>
This commit is contained in:
Sven Strickroth 2012-09-29 20:20:41 +02:00
parent f2b126c76e
commit 549ee21a6f
1 changed files with 100 additions and 0 deletions
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100
src/fileops.c
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@ -418,6 +418,102 @@ static int win32_find_file(git_buf *path, const struct win32_path *root, const c
git__free(file_utf16);
return 0;
}
static wchar_t * nextpath(wchar_t * src, wchar_t * dst, size_t maxlen)
{
wchar_t * orgsrc;
while (*src == L';')
src++;
orgsrc = src;
if (!--maxlen)
goto nullterm;
while (*src && *src != L';')
{
if (*src != L'"')
{
*dst++ = *src++;
if (!--maxlen)
{
orgsrc = src;
goto nullterm;
}
}
else
{
src++;
while (*src && *src != L'"')
{
*dst++ = *src++;
if (!--maxlen)
{
orgsrc = src;
goto nullterm;
}
}
if (*src)
src++;
}
}
while (*src == L';')
src++;
nullterm:
*dst = 0;
return (orgsrc != src) ? (wchar_t *)src : NULL;
}
int find_system_file_using_path(git_buf *path, const char *filename)
{
size_t size = 0;
wchar_t * env = NULL, * envOrig = NULL;
struct win32_path root;
_wgetenv_s(&size, NULL, 0, L"PATH");
if (!size)
return -1;
// make a copy of the content of the environment variable so that we can modify it
envOrig = git__calloc(size, sizeof(wchar_t));
GITERR_CHECK_ALLOC(envOrig);
_wgetenv_s(&size, envOrig, size, L"PATH");
env = envOrig;
// search in all paths defined in PATH
while ((env = nextpath(env, root.path, MAX_PATH - 1)) != NULL && *root.path)
{
wchar_t * pfin = root.path + wcslen(root.path) - 1; // last char of the current path entry
// ensure trailing slash
if (*pfin != L'/' && *pfin != L'\\')
wcscpy_s(++pfin, 2, L"\\"); // we have enough space left, MAX_PATH - 1 is used in nextpath above
root.len = (DWORD)wcslen(root.path) + 1;
if (win32_find_file(path, &root, "git.cmd") == 0 || win32_find_file(path, &root, "git.exe") == 0) {
// we found the cmd or bin directory of a git installaton
if (root.len > 5) {
wcscpy_s(root.path + wcslen(root.path) - 4, 5, L"etc\\");
if (win32_find_file(path, &root, filename) == 0)
{
git__free(envOrig);
return 0;
}
}
}
}
git__free(envOrig);
return GIT_ENOTFOUND;
}
#endif
int git_futils_find_system_file(git_buf *path, const char *filename)
@ -435,6 +531,10 @@ int git_futils_find_system_file(git_buf *path, const char *filename)
DWORD dwType = REG_SZ;
DWORD dwSize = MAX_PATH;
// try to find git.exe/git.cmd on path
if (!find_system_file_using_path(path, filename))
return 0;
root.len = 0;
if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, REG_MSYSGIT_INSTALL, 0, KEY_ALL_ACCESS, &hKey) == ERROR_SUCCESS)
{