From 0aa785130e8e3456ace457e7fb586794aaaee4aa Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Thu, 6 Nov 2014 20:47:38 -0500
Subject: [PATCH] Listing now has a selection mark.

---
 src | 95 +++++++++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 67 insertions(+), 28 deletions(-)

diff --git a/src b/src
index 0173975..865aad9 100755
--- a/src
+++ b/src
@@ -27,6 +27,7 @@ def croak(msg):
 
 debug = 0
 DEBUG_COMMANDS  = 1    # Show commands as they are executed
+DEBUG_PARSE     = 2    # Debug logfile parse
 
 def do_or_die(dcmd, legend=b"", loud=False):
     "Either execute a command or raise a fatal exception."
@@ -79,11 +80,14 @@ class popen_or_die:
 
 class RCSRevisionItem:
     "Capture the state of an RCS revision item in the log."
-    def __init__(self, revno):
+    def __init__(self, master, revno):
+        self.master = master
         self.revno = revno;
         self.revision = None
         self.log = ""
         self.date = None
+    def selected(self):
+        return self.revision == self.master.lockrevs[0]
 
 class RCSLog:
     "Encapsulate a revision list and some methods on it"
@@ -92,40 +96,70 @@ class RCSLog:
         self.revlist = []
         with popen_or_die("cd .src >/dev/null; rlog %s; cd ..>/dev/null" % name) as fp:
             self.revlist = []
+            self.lockrevs = []
             maxrevno = 0
-            state = "initial"
+            if debug >= DEBUG_PARSE:
+                sys.stdout.write("\t-> init\n")
+            state = "init"
             for line in fp:
-                if line.startswith("----------------------------"):
+                if debug >= DEBUG_PARSE:
+                    sys.stdout.write("in: %s\n" % repr(line))
+                if state == "init":
+                    if line.startswith("locks:"):
+                        if debug >= DEBUG_PARSE:
+                            sys.stdout.write("\t-> locks\n")
+                        state = "locks"
+                elif line.startswith("----------------------------"):
+                    if debug >= DEBUG_PARSE:
+                        sys.stdout.write("\t-> logheader\n")
                     state = "logheader"
-                    self.revlist.append(RCSRevisionItem(maxrevno))
+                    self.revlist.append(RCSRevisionItem(self, maxrevno))
                     maxrevno += 1
-                elif state == "logheader" and line.startswith("revision"):
-                    fields = line.split()
-                    self.revlist[-1].revision = fields[1]
-                elif state == "logheader" and line.startswith("date"):
-                    fields = line.split()
-                    date = fields[1] + " " + fields[2]
-                    if date.endswith(";"):
-                        date = date[:-1]
-                    date = date.replace("/", "-").replace(" ", "T") + "Z"
-                    self.revlist[-1].date = date
-                elif line.startswith("======================="):
-                    if not self.revlist[-1].log.endswith("\n"):
-                        self.revlist[-1].log += "\n"
-                    break
-                elif self.revlist:
-                    self.revlist[-1].log += line[1:]
+                elif state == "locks":
+                    if not line[0].isspace():
+                        if debug >= DEBUG_PARSE:
+                            sys.stdout.write("\t-> init\n")
+                            state = "init"
+                    else:
+                        fields = line.strip().split()
+                        self.lockrevs.append(fields[1])
+                elif state == "logheader":
+                    if line.startswith("revision"):
+                        fields = line.split()
+                        self.revlist[-1].revision = fields[1]
+                    elif line.startswith("date"):
+                        fields = line.split()
+                        date = fields[1] + " " + fields[2]
+                        if date.endswith(";"):
+                            date = date[:-1]
+                        date = date.replace("/", "-").replace(" ", "T") + "Z"
+                        self.revlist[-1].date = date
+                    elif line.startswith("======================="):
+                        if not self.revlist[-1].log.endswith("\n"):
+                            self.revlist[-1].log += "\n"
+                        break
+                    elif self.revlist:
+                        self.revlist[-1].log += line[1:]
             for item in self.revlist:
                 item.revno = maxrevno - item.revno
+            if debug >= DEBUG_PARSE:
+                print "\tlockrevs:", self.lockrevs
     def __len__(self):
         return len(self.revlist)
     def __getitem__(self, i):
-        "Use 1-origin indices, lowest oldest."
-        return self.revlist[len(self.revlist) - i]
-
-def log_capture(fn):
-    "Capture and parse the metadata for a specified file."
-    return revlist
+        return self.revlist[i]
+    def rcs_to_revno(self, revision):
+        "Map an RCS ID to a revno"
+        for item in self.revlist:
+            if item.revision == revision:
+                return item.revno
+        return None
+    def revno_to_rcs(self, revno):
+        "Map a revno to an RCS ID"
+        for item in self.revlist:
+            if item.revno == revno:
+                return item.revision
+        return None
 
 def help_method(*args):
     "Summarize src commands, or (with argument) show help for a single command."
@@ -246,8 +280,13 @@ def list_method(*args):
         for item in RCSLog(arg):
             if not revspec or item.revno in revspec:
                 # Must allow enough room for revno and date
-                summary = item.log.strip()[:width - 32]
-                sys.stdout.write("%-4d %s %s\n" % (item.revno, item.date, summary))
+                summary = item.log.strip()[:width - 34]
+                if item.selected():
+                    mark = "*"
+                else:
+                    mark = "-"
+                sys.stdout.write("%-4d  %s %s %s\n" \
+                                 % (item.revno, mark, item.date, summary))
 
 def log_method(*args):
     "Report revision logs"
-- 
2.43.0