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isValidSchemeName: Add function
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3 changed files with 44 additions and 0 deletions
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@ -3,6 +3,7 @@
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#include "util.hh"
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#include "util.hh"
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#include "split.hh"
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#include "split.hh"
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#include "canon-path.hh"
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#include "canon-path.hh"
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#include "string.hh"
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namespace nix {
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namespace nix {
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@ -183,4 +184,20 @@ std::string fixGitURL(const std::string & url)
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}
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}
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}
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}
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// https://www.rfc-editor.org/rfc/rfc3986#section-3.1
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bool isValidSchemeName(std::string_view s)
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{
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if (s.empty()) return false;
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if (!isASCIIAlpha(s[0])) return false;
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for (auto c : s.substr(1)) {
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if (isASCIIAlpha(c)) continue;
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if (isASCIIDigit(c)) continue;
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if (c == '+') continue;
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if (c == '-') continue;
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if (c == '.') continue;
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return false;
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}
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return true;
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}
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}
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}
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@ -55,4 +55,13 @@ ParsedUrlScheme parseUrlScheme(std::string_view scheme);
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changes absolute paths into file:// URLs. */
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changes absolute paths into file:// URLs. */
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std::string fixGitURL(const std::string & url);
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std::string fixGitURL(const std::string & url);
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/**
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* Whether a string is valid as RFC 3986 scheme name.
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* Colon `:` is part of the URI; not the scheme name, and therefore rejected.
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* See https://www.rfc-editor.org/rfc/rfc3986#section-3.1
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*
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* Does not check whether the scheme is understood, as that's context-dependent.
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*/
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bool isValidSchemeName(std::string_view scheme);
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}
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}
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@ -344,4 +344,22 @@ namespace nix {
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ASSERT_EQ(percentDecode(e), s);
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ASSERT_EQ(percentDecode(e), s);
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}
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}
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TEST(nix, isValidSchemeName) {
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ASSERT_TRUE(isValidSchemeName("http"));
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ASSERT_TRUE(isValidSchemeName("https"));
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ASSERT_TRUE(isValidSchemeName("file"));
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ASSERT_TRUE(isValidSchemeName("file+https"));
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ASSERT_TRUE(isValidSchemeName("fi.le"));
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ASSERT_TRUE(isValidSchemeName("file-ssh"));
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ASSERT_TRUE(isValidSchemeName("file+"));
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ASSERT_TRUE(isValidSchemeName("file."));
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ASSERT_TRUE(isValidSchemeName("file1"));
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ASSERT_FALSE(isValidSchemeName("file:"));
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ASSERT_FALSE(isValidSchemeName("file/"));
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ASSERT_FALSE(isValidSchemeName("+file"));
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ASSERT_FALSE(isValidSchemeName(".file"));
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ASSERT_FALSE(isValidSchemeName("-file"));
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ASSERT_FALSE(isValidSchemeName("1file"));
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}
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}
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}
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