hosts files

cli/completer.go

@@ -176,6 +176,11 @@ func (x *completer) completeExec(line []rune) ([][]rune, int) {
 		return x.completeTag(line[1:])
 	}
 
+	if len(line) > 0 && line[0] == '&' {
+		comp, ll := completeFiles(line[1:])
+		return comp, ll + 1
+	}
+
 	return x.completeHost(line)
 }
 

cli/handlers.go

@@ -6,6 +6,7 @@ import (
 	"os/exec"
 	"os/signal"
 	"runtime"
+	"runtime/debug"
 	"strconv"
 	"syscall"
 
@@ -56,6 +57,7 @@ func (c *Cli) setupCmdHandlers() {
 	c.handlers["version"] = c.doVersion
 	c.handlers["goruntime"] = c.doGoruntime
 	c.handlers["natural_sort"] = c.doNaturalSort
+	c.handlers["_mem"] = c.doMemoryDump
 
 	commands := make([]string, len(c.handlers))
 	i := 0
@@ -74,6 +76,16 @@ func (c *Cli) doExit(name string, argsLine string, args ...string) {
 	c.stopped = true
 }
 
+func (c *Cli) doMemoryDump(name string, argsLine string, args ...string) {
+	f, err := os.Create("/tmp/xcheap.dump")
+	if err != nil {
+		term.Errorf("Can't dump: %s\n", err)
+		return
+	}
+	defer f.Close()
+	debug.WriteHeapDump(f.Fd())
+}
+
 func (c *Cli) doMode(name string, argsLine string, args ...string) {
 	if len(args) < 1 {
 		term.Errorf("Usage: mode <[serial,parallel,collapse]>\n")

cli/help.go

@@ -252,7 +252,8 @@ with symlinks. It's more stable though.`,
 Every expression is a comma-separated list of tokens, where token may be
     - a single host,
     - a single group,
-    - a single workgroup,
+	- a single workgroup,
+	- a filename containing a list of hosts
 and every item may optionally be limited to a particular datacenter, a given tag, 
 or even be completely excluded from the list.
 
@@ -263,8 +264,9 @@ Some self-explanatory examples:
     %group1,-host2                      - all hosts from group1, excluding(!) host2
     %group2@dc1                         - all hosts from group2, located in datacenter dc1
     *myworkgroup@dc2,-%group3,host5     - all hosts from wg "myworkgroup" excluding hosts from group3, plus host5
-    %group5#tag1                        - all hosts from group5 tagged with tag1
-    
+	%group5#tag1                        - all hosts from group5 tagged with tag1
+	&hosts.txt                          - hosts from file hosts.txt
+	
 You may combine any number of tokens keeping in mind that they are resolved left to right, so exclusions
 almost always should be on the righthand side. For example, "-host1,host1" will end up with host1 in list
 despite being excluded previously.`,