Merge pull request #3073 from tweag/machine-logs

Add an option to print the logs in a machine-readable format

src/libstore/build.cc

@@ -1642,7 +1642,7 @@ void DerivationGoal::buildDone()
                 worker.store.printStorePath(drvPath),
                 statusToString(status));
 
-            if (!settings.verboseBuild && !logTail.empty()) {
+            if (!logger->isVerbose() && !logTail.empty()) {
                 msg += (format("; last %d log lines:") % logTail.size()).str();
                 for (auto & line : logTail)
                     msg += "\n  " + line;
@@ -1691,11 +1691,7 @@ void DerivationGoal::buildDone()
                 }
 
                 void flushLine() {
-                    if (settings.verboseBuild) {
-                        printError("post-build-hook: " + currentLine);
-                    } else {
-                        act.result(resPostBuildLogLine, currentLine);
-                    }
+                    act.result(resPostBuildLogLine, currentLine);
                     currentLine.clear();
                 }
 
@@ -4155,13 +4151,8 @@ void DerivationGoal::flushLine()
         ;
 
     else {
-        if (settings.verboseBuild &&
-            (settings.printRepeatedBuilds || curRound == 1))
-            printError(currentLogLine);
-        else {
-            logTail.push_back(currentLogLine);
-            if (logTail.size() > settings.logLines) logTail.pop_front();
-        }
+        logTail.push_back(currentLogLine);
+        if (logTail.size() > settings.logLines) logTail.pop_front();
 
         act->result(resBuildLogLine, currentLogLine);
     }

src/libstore/names.cc

@@ -0,0 +1,107 @@
+#include "names.hh"
+#include "util.hh"
+
+
+namespace nix {
+
+
+DrvName::DrvName()
+{
+    name = "";
+}
+
+
+/* Parse a derivation name.  The `name' part of a derivation name is
+   everything up to but not including the first dash *not* followed by
+   a letter.  The `version' part is the rest (excluding the separating
+   dash).  E.g., `apache-httpd-2.0.48' is parsed to (`apache-httpd',
+   '2.0.48'). */
+DrvName::DrvName(std::string_view s) : hits(0)
+{
+    name = fullName = std::string(s);
+    for (unsigned int i = 0; i < s.size(); ++i) {
+        /* !!! isalpha/isdigit are affected by the locale. */
+        if (s[i] == '-' && i + 1 < s.size() && !isalpha(s[i + 1])) {
+            name = s.substr(0, i);
+            version = s.substr(i + 1);
+            break;
+        }
+    }
+}
+
+
+bool DrvName::matches(DrvName & n)
+{
+    if (name != "*") {
+        if (!regex) regex = std::unique_ptr<std::regex>(new std::regex(name, std::regex::extended));
+        if (!std::regex_match(n.name, *regex)) return false;
+    }
+    if (version != "" && version != n.version) return false;
+    return true;
+}
+
+
+string nextComponent(string::const_iterator & p,
+    const string::const_iterator end)
+{
+    /* Skip any dots and dashes (component separators). */
+    while (p != end && (*p == '.' || *p == '-')) ++p;
+
+    if (p == end) return "";
+
+    /* If the first character is a digit, consume the longest sequence
+       of digits.  Otherwise, consume the longest sequence of
+       non-digit, non-separator characters. */
+    string s;
+    if (isdigit(*p))
+        while (p != end && isdigit(*p)) s += *p++;
+    else
+        while (p != end && (!isdigit(*p) && *p != '.' && *p != '-'))
+            s += *p++;
+
+    return s;
+}
+
+
+static bool componentsLT(const string & c1, const string & c2)
+{
+    int n1, n2;
+    bool c1Num = string2Int(c1, n1), c2Num = string2Int(c2, n2);
+
+    if (c1Num && c2Num) return n1 < n2;
+    else if (c1 == "" && c2Num) return true;
+    else if (c1 == "pre" && c2 != "pre") return true;
+    else if (c2 == "pre") return false;
+    /* Assume that `2.3a' < `2.3.1'. */
+    else if (c2Num) return true;
+    else if (c1Num) return false;
+    else return c1 < c2;
+}
+
+
+int compareVersions(const string & v1, const string & v2)
+{
+    string::const_iterator p1 = v1.begin();
+    string::const_iterator p2 = v2.begin();
+
+    while (p1 != v1.end() || p2 != v2.end()) {
+        string c1 = nextComponent(p1, v1.end());
+        string c2 = nextComponent(p2, v2.end());
+        if (componentsLT(c1, c2)) return -1;
+        else if (componentsLT(c2, c1)) return 1;
+    }
+
+    return 0;
+}
+
+
+DrvNames drvNamesFromArgs(const Strings & opArgs)
+{
+    DrvNames result;
+    for (auto & i : opArgs)
+        result.push_back(DrvName(i));
+    return result;
+}
+
+
+}

src/libstore/names.hh

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <memory>
+
+#include "types.hh"
+#include <regex>
+
+namespace nix {
+
+struct DrvName
+{
+    string fullName;
+    string name;
+    string version;
+    unsigned int hits;
+
+    DrvName();
+    DrvName(std::string_view s);
+    bool matches(DrvName & n);
+
+private:
+    std::unique_ptr<std::regex> regex;
+};
+
+typedef list<DrvName> DrvNames;
+
+string nextComponent(string::const_iterator & p,
+    const string::const_iterator end);
+int compareVersions(const string & v1, const string & v2);
+DrvNames drvNamesFromArgs(const Strings & opArgs);
+
+}