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-rw-r--r--libbuild2/utility.ixx67
1 files changed, 67 insertions, 0 deletions
diff --git a/libbuild2/utility.ixx b/libbuild2/utility.ixx
index 9a77fae..3f9d34b 100644
--- a/libbuild2/utility.ixx
+++ b/libbuild2/utility.ixx
@@ -241,6 +241,73 @@ namespace build2
return find_option_prefixes (ps, s[var], ic);
}
+ // hash_environment()
+ //
+ inline void
+ hash_environment (sha256& cs, const char* n)
+ {
+ cs.append (n);
+
+ if (optional<string> v = getenv (n))
+ cs.append (*v);
+ }
+
+ inline void
+ hash_environment (sha256& cs, const string& n)
+ {
+ hash_environment (cs, n.c_str ());
+ }
+
+ inline void
+ hash_environment (sha256& cs, initializer_list<const char*> ns)
+ {
+ for (const char* n: ns)
+ hash_environment (cs, n);
+ }
+
+ inline string
+ hash_environment (initializer_list<const char*> ns)
+ {
+ sha256 cs;
+ hash_environment (cs, ns);
+ return cs.string ();
+ }
+
+ inline void
+ hash_environment (sha256& cs, const strings& ns)
+ {
+ for (const string& n: ns)
+ hash_environment (cs, n);
+ }
+
+ inline string
+ hash_environment (const strings& ns)
+ {
+ sha256 cs;
+ hash_environment (cs, ns);
+ return cs.string ();
+ }
+
+ inline void
+ hash_environment (sha256& cs, const char* const* ns)
+ {
+ if (ns != nullptr)
+ {
+ for (; *ns != nullptr; ++ns)
+ hash_environment (cs, *ns);
+ }
+ }
+
+ inline string
+ hash_environment (const char* const* ns)
+ {
+ sha256 cs;
+ hash_environment (cs, ns);
+ return cs.string ();
+ }
+
+ // find_stem()
+ //
inline size_t
find_stem (const string& s, size_t s_p, size_t s_n,
const char* stem, const char* seps)