id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	launchpad_bug
939	the CLI should fail gracefully when tahoe: doesn't exist and no alias is specified	kevan	kevan	"When I do 'tahoe ls' on a fresh node, I get

{{{
kevan@b8chem-87:~$ tahoe ls
Traceback (most recent call last):
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/support/bin/tahoe"", line 8, in <module>
    load_entry_point('allmydata-tahoe==1.6.0', 'console_scripts', 'tahoe')()
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/src/allmydata/scripts/runner.py"", line 102, in run
    rc = runner(sys.argv[1:])
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/src/allmydata/scripts/runner.py"", line 89, in runner
    rc = cli.dispatch[command](so)
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/src/allmydata/scripts/cli.py"", line 429, in list
    rc = tahoe_ls.list(options)
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/src/allmydata/scripts/tahoe_ls.py"", line 18, in list
    rootcap, path = get_alias(aliases, where, DEFAULT_ALIAS)
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/src/allmydata/scripts/common.py"", line 150, in get_alias
    return aliases[default], path
KeyError: 'tahoe'
kevan@b8chem-87:~$ 
}}}

If I create an alias, then try again, I get

{{{
kevan@b8chem-87:~$ tahoe create-alias havasu
Alias 'havasu' created
kevan@b8chem-87:~$ tahoe ls
Traceback (most recent call last):
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/support/bin/tahoe"", line 8, in <module>
    load_entry_point('allmydata-tahoe==1.6.0', 'console_scripts', 'tahoe')()
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/src/allmydata/scripts/runner.py"", line 102, in run
    rc = runner(sys.argv[1:])
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/src/allmydata/scripts/runner.py"", line 89, in runner
    rc = cli.dispatch[command](so)
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/src/allmydata/scripts/cli.py"", line 429, in list
    rc = tahoe_ls.list(options)
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/src/allmydata/scripts/tahoe_ls.py"", line 18, in list
    rootcap, path = get_alias(aliases, where, DEFAULT_ALIAS)
  File ""/home/kevan/Desktop/software/tahoe/allmydata-tahoe-1.6.0/src/allmydata/scripts/common.py"", line 150, in get_alias
    return aliases[default], path
KeyError: 'tahoe'
kevan@b8chem-87:~$ 
}}}

I should probably see something like
{{{
kevan@b8chem-87:~$ tahoe ls
Usage:  tahoe <command> [command options] ls [options]
Options:
  -q, --quiet             Operate silently.
  -V, --version           Display version numbers and exit.
      --version-and-path  Display version numbers and paths to their locations
                          and exit.
  -l, --long              Use long format: show file sizes, and timestamps
      --uri               Show file/directory URIs
      --readonly-uri      Show readonly file/directory URIs
  -F, --classify          Append '/' to directory names, and '*' to mutable
      --json              Show the raw JSON output
  -d, --node-directory=   Look here to find out which Tahoe node should be used
                          for all operations. The directory should either
                          contain a full Tahoe node, or a file named node.url
                          which points to some other Tahoe node. It should also
                          contain a file named private/aliases which contains
                          the mapping from alias name to root dirnode URI.
                          [default: ~/.tahoe]
  -u, --node-url=         URL of the tahoe node to use, a URL like
                          ""http://127.0.0.1:3456"". This overrides the URL found
                          in the --node-directory .
      --dir-cap=          Which dirnode URI should be used as the 'tahoe' alias.
      --help              Display this help and exit.

List the contents of some portion of the grid.

error: no alias specified, and the default 'tahoe' alias doesn't exist.
kevan@b8chem-87:~$ 
}}}

or, perhaps better still, the CLI code could look in ~/.tahoe/private/aliases and choose one of those instead of requiring the 'tahoe' alias (failing gracefully with something like the message above if nothing is there, of course). "	defect	closed	major	1.6.1	code-frontend-cli	1.6.0	fixed	easy usability error alias reviewed