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authorGravatar Kevin Ballard <kevin@sb.org>2014-07-09 18:21:06 -0700
committerGravatar Kevin Ballard <kevin@sb.org>2014-07-13 19:11:29 -0700
commitcc565fc16c69affeda4a7e8a1c8d7e419fc5c519 (patch)
tree2114971f50b55a8992f2165afaead7565020a665
parent62d86b3d18feb24f93d615cfadfe1fbad86ef118 (diff)
Teach `command` builtin a -p/--path flag
Give the `command` builtin a single flag, -p/--path, that causes it to print the full path that would be executed for the given command.
-rw-r--r--builtin.cpp82
-rw-r--r--doc_src/command.txt12
2 files changed, 91 insertions, 3 deletions
diff --git a/builtin.cpp b/builtin.cpp
index a7b173bb..2d3eb749 100644
--- a/builtin.cpp
+++ b/builtin.cpp
@@ -1054,6 +1054,86 @@ static int builtin_emit(parser_t &parser, wchar_t **argv)
/**
+ Implementation of the builtin 'command'. Actual command running is handled by
+ the parser, this just processes the flags.
+*/
+static int builtin_command(parser_t &parser, wchar_t **argv)
+{
+ int argc=builtin_count_args(argv);
+ int print_path=0;
+
+ woptind=0;
+
+ static const struct woption
+ long_options[] =
+ {
+ { L"path", no_argument, 0, 'p' },
+ { L"help", no_argument, 0, 'h' },
+ { 0, 0, 0, 0 }
+ };
+
+ while (1)
+ {
+ int opt_index = 0;
+
+ int opt = wgetopt_long(argc,
+ argv,
+ L"ph",
+ long_options,
+ &opt_index);
+ if (opt == -1)
+ break;
+
+ switch (opt)
+ {
+ case 0:
+ if (long_options[opt_index].flag != 0)
+ break;
+ append_format(stderr_buffer,
+ BUILTIN_ERR_UNKNOWN,
+ argv[0],
+ long_options[opt_index].name);
+ builtin_print_help(parser, argv[0], stderr_buffer);
+ return STATUS_BUILTIN_ERROR;
+
+ case 'h':
+ builtin_print_help(parser, argv[0], stdout_buffer);
+ return STATUS_BUILTIN_OK;
+
+ case 'p':
+ print_path=1;
+ break;
+
+ case '?':
+ builtin_unknown_option(parser, argv[0], argv[woptind-1]);
+ return STATUS_BUILTIN_ERROR;
+
+ }
+
+ }
+
+ if (!print_path)
+ {
+ builtin_print_help(parser, argv[0], stdout_buffer);
+ return STATUS_BUILTIN_ERROR;
+ }
+
+ int found=0;
+
+ for (int idx = woptind; argv[idx]; ++idx)
+ {
+ const wchar_t *command_name = argv[idx];
+ wcstring path;
+ if (path_get_path(command_name, &path))
+ {
+ append_format(stdout_buffer, L"%ls\n", path.c_str());
+ ++found;
+ }
+ }
+ return found ? STATUS_BUILTIN_OK : STATUS_BUILTIN_ERROR;
+}
+
+/**
A generic bultin that only supports showing a help message. This is
only a placeholder that prints the help message. Useful for
commands that live in the parser.
@@ -3703,7 +3783,7 @@ static const builtin_data_t builtin_datas[]=
{ L"builtin", &builtin_builtin, N_(L"Run a builtin command instead of a function") },
{ L"case", &builtin_generic, N_(L"Conditionally execute a block of commands") },
{ L"cd", &builtin_cd, N_(L"Change working directory") },
- { L"command", &builtin_generic, N_(L"Run a program instead of a function or builtin") },
+ { L"command", &builtin_command, N_(L"Run a program instead of a function or builtin") },
{ L"commandline", &builtin_commandline, N_(L"Set or get the commandline") },
{ L"complete", &builtin_complete, N_(L"Edit command specific completions") },
{ L"contains", &builtin_contains, N_(L"Search for a specified string in a list") },
diff --git a/doc_src/command.txt b/doc_src/command.txt
index 19baccd4..e93f34b8 100644
--- a/doc_src/command.txt
+++ b/doc_src/command.txt
@@ -1,12 +1,20 @@
\section command command - run a program
\subsection command-synopsis Synopsis
-<tt>command COMMANDNAME [OPTIONS...]</tt>
+<tt>command [OPTIONS] COMMANDNAME [ARGS...]</tt>
\subsection command-description Description
\c command forces the shell to execute the program \c COMMANDNAME and ignore any functions or builtins with the same name.
-\subsection command-example Example
+The following options are available:
+- \c -h or \c --help prints help and then exits.
+- \c -p or \c --path returns the name of the disk file that would be executed, or nothing if no file with the specified name could be found in the <tt>$PATH</tt>.
+
+With the \c -p option, \c command treats every argument as a separate command to look up and sets the exit status to 0 if any of the specified commands were found, or 1 if no commands could be found.
+
+\subsection command-example Examples
<tt>command ls</tt> causes fish to execute the \c ls program, even if an 'ls' function exists.
+
+<tt>command -p ls</tt> returns the path to the \c ls program.