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cmSystemTools: Add helpers for reading and parsing PATH env vars

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This commit is contained in:
Brad King 2023-02-14 14:22:52 -05:00
parent d3ea15e801
commit acd9636d9d
2 changed files with 29 additions and 0 deletions
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26
Source/cmSystemTools.cxx
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@ -1648,6 +1648,32 @@ std::string cmSystemTools::RelativeIfUnder(std::string const& top,
return out;
}
cm::optional<std::string> cmSystemTools::GetEnvVar(std::string const& var)
{
cm::optional<std::string> result;
{
std::string value;
if (cmSystemTools::GetEnv(var, value)) {
result = std::move(value);
}
}
return result;
}
std::vector<std::string> cmSystemTools::SplitEnvPath(std::string const& value)
{
#if defined(_WIN32) && !defined(__CYGWIN__)
static cm::string_view sep = ";"_s;
#else
static cm::string_view sep = ":"_s;
#endif
std::vector<std::string> paths = cmTokenize(value, sep);
for (std::string& p : paths) {
SystemTools::ConvertToUnixSlashes(p);
}
return paths;
}
#ifndef CMAKE_BOOTSTRAP
bool cmSystemTools::UnsetEnv(const char* value)
{

3
Source/cmSystemTools.h
View File

@ -399,6 +399,9 @@ public:
static std::string RelativeIfUnder(std::string const& top,
std::string const& in);
static cm::optional<std::string> GetEnvVar(std::string const& var);
static std::vector<std::string> SplitEnvPath(std::string const& value);
#ifndef CMAKE_BOOTSTRAP
/** Remove an environment variable */
static bool UnsetEnv(const char* value);