1 files changed, 172 insertions, 0 deletions
diff --git a/src/nix-log2xml/log2xml.cc b/src/nix-log2xml/log2xml.cc
new file mode 100644
index 000000000000..c30fa5b02667
--- /dev/null
+++ b/src/nix-log2xml/log2xml.cc
@@ -0,0 +1,172 @@
+#include <vector>
+#include <iostream>
+#include <cstdio>
+#include <string>
+
+using namespace std;
+
+
+struct Decoder
+{
+    enum { stTop, stEscape, stCSI } state;
+    string line;
+    bool inHeader;
+    int level;
+    vector<int> args;
+    bool newNumber;
+    int priority;
+    bool ignoreLF;
+    int lineNo, charNo;
+
+    Decoder()
+    {
+        state = stTop;
+        line = "";
+        inHeader = false;
+        level = 0;
+        priority = 1;
+        ignoreLF = false;
+        lineNo = 1;
+        charNo = 0;
+    }
+
+    void pushChar(char c);
+
+    void finishLine();
+};
+
+
+void Decoder::pushChar(char c)
+{
+    if (c == '\n') {
+        lineNo++;
+        charNo = 0;
+    } else charNo++;
+    
+    switch (state) {
+        
+        case stTop:
+            if (c == '\e') {
+                state = stEscape;
+            } else if (c == '\n' && !ignoreLF) {
+                finishLine();
+            } else line += c;
+            break;
+
+        case stEscape:
+            if (c == '[') {
+                state = stCSI;
+                args.clear();
+                newNumber = true;
+            } else
+                state = stTop; /* !!! wrong */
+            break;
+
+        case stCSI:
+            if (c >= 0x40 && c != 0x7e) {
+                state = stTop;
+                switch (c) {
+                    case 'p':
+                        if (line.size()) finishLine();
+                        level++;
+                        inHeader = true;
+                        cout << "<nest>" << endl;
+                        priority = args.size() >= 1 ? args[0] : 1;
+                        break;
+                    case 'q':
+                        if (line.size()) finishLine();
+                        if (level > 0) {
+                            level--;
+                            cout << "</nest>" << endl;
+                        } else
+                            cerr << "not enough nesting levels at line "
+                                 << lineNo << ", character " << charNo  << endl;
+                        break;
+                    case 's':
+                        if (line.size()) finishLine();
+                        priority = args.size() >= 1 ? args[0] : 1;
+                        break;
+                    case 'a':
+                        ignoreLF = true;
+                        break;
+                    case 'b':
+                        ignoreLF = false;
+                        break;
+                }
+            } else if (c >= '0' && c <= '9') {
+                int n = 0;
+                if (!newNumber) {
+                    n = args.back() * 10;
+                    args.pop_back();
+                }
+                n += c - '0';
+                args.push_back(n);
+            }
+            break;
+            
+    }
+}
+
+
+void Decoder::finishLine()
+{
+    string storeDir = "/nix/store/";
+    int sz = storeDir.size();
+    string tag = inHeader ? "head" : "line";
+    cout << "<" << tag;
+    if (priority != 1) cout << " priority='" << priority << "'";
+    cout << ">";
+
+    for (unsigned int i = 0; i < line.size(); i++) {
+
+        if (line[i] == '<') cout << "&lt;";
+        else if (line[i] == '&') cout << "&amp;";
+        else if (line[i] < 32 && line[i] != 9) cout << "&#xfffd;";
+        else if (i + sz + 33 < line.size() &&
+            string(line, i, sz) == storeDir &&
+            line[i + sz + 32] == '-')
+        {
+            int j = i + sz + 32;
+            /* skip name */
+            while (!strchr("/\n\r\t ()[]:;?<>", line[j])) j++;
+            int k = j;
+            while (!strchr("\n\r\t ()[]:;?<>", line[k])) k++;
+            // !!! escaping
+            cout << "<storeref>"
+                 << "<storedir>"
+                 << string(line, i, sz)
+                 << "</storedir>"
+                 << "<hash>"
+                 << string(line, i + sz, 32)
+                 << "</hash>"
+                 << "<name>"
+                 << string(line, i + sz + 32, j - (i + sz + 32))
+                 << "</name>"
+                 << "<path>"
+                 << string(line, j, k - j)
+                 << "</path>"
+                 << "</storeref>";
+            i = k - 1;
+        } else cout << line[i];
+    }
+    
+    cout << "</" << tag << ">" << endl;
+    line = "";
+    inHeader = false;
+    priority = 1;
+}
+
+
+int main(int argc, char * * argv)
+{
+    Decoder dec;
+    int c;
+
+    cout << "<logfile>" << endl;
+    
+    while ((c = getchar()) != EOF) {
+        dec.pushChar(c);
+    }
+
+    cout << "</logfile>" << endl;
+}