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/** |
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* This file is part of the CernVM File System. |
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*/ |
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#include "cmd_help.h" |
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#include <algorithm> |
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#include <string> |
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#include <vector> |
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#include "publish/except.h" |
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#include "util/logging.h" |
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#include "util/string.h" |
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using namespace std; // NOLINT |
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namespace publish { |
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int CmdHelp::Main(const Options &options) { |
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Command *cmd = commands_->Find(options.plain_args()[0].value_str); |
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if (cmd == NULL) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "No help for '%s'", |
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options.plain_args()[0].value_str.c_str()); |
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return 1; |
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} |
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cmd->progname_ = progname(); |
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LogCvmfs(kLogCvmfs, kLogStdout, "\nHelp for '%s'", cmd->GetName().c_str()); |
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for (unsigned i = 0; i < cmd->GetName().length() + 11; ++i) |
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LogCvmfs(kLogCvmfs, kLogStdout | kLogNoLinebreak, "="); |
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LogCvmfs(kLogCvmfs, kLogStdout | kLogNoLinebreak, "\n"); |
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LogCvmfs(kLogCvmfs, kLogStdout, "%s\n", cmd->GetDescription().c_str()); |
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LogCvmfs(kLogCvmfs, kLogStdout, "Usage:"); |
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LogCvmfs(kLogCvmfs, kLogStdout, "------"); |
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LogCvmfs(kLogCvmfs, kLogStdout, " %s %s %s\n", |
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progname().c_str(), cmd->GetName().c_str(), cmd->GetUsage().c_str()); |
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std::string examples = cmd->GetExamples(); |
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if (!examples.empty()) { |
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LogCvmfs(kLogCvmfs, kLogStdout, "Examples:"); |
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LogCvmfs(kLogCvmfs, kLogStdout, "---------"); |
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std::vector<std::string> ex_lines = SplitString(examples, '\n'); |
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for (unsigned i = 0; i < ex_lines.size() - 1; ++i) { |
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LogCvmfs(kLogCvmfs, kLogStdout, " [%d] %s", i + 1, ex_lines[i].c_str()); |
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} |
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LogCvmfs(kLogCvmfs, kLogStdout | kLogNoLinebreak, "\n"); |
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} |
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ParameterList params = cmd->GetParams(); |
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if (params.empty()) return 0; |
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LogCvmfs(kLogCvmfs, kLogStdout, "Options:"); |
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LogCvmfs(kLogCvmfs, kLogStdout, "--------"); |
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string::size_type max_len = 0; |
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for (unsigned i = 0; i < params.size(); ++i) { |
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string::size_type l = params[i].key.length(); |
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if (!params[i].is_switch) { |
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l += 3 + params[i].arg_name.length(); |
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} |
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max_len = std::max(max_len, l); |
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} |
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for (unsigned i = 0; i < params.size(); ++i) { |
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LogCvmfs(kLogCvmfs, kLogStdout | kLogNoLinebreak, " -%c, --%s%s", |
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params[i].short_key, params[i].key.c_str(), |
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params[i].is_switch ? |
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"" : (" <" + params[i].arg_name + ">").c_str()); |
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unsigned l = params[i].key.length(); |
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if (!params[i].is_switch) l += 3 + params[i].arg_name.length(); |
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for (unsigned p = l; p < max_len; ++p) |
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LogCvmfs(kLogCvmfs, kLogStdout | kLogNoLinebreak, " "); |
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LogCvmfs(kLogCvmfs, kLogStdout, " %s%s", |
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params[i].description.c_str(), |
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params[i].is_optional ? "" : " [mandatory]"); |
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} |
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LogCvmfs(kLogCvmfs, kLogStdout | kLogNoLinebreak, "\n"); |
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return 0; |
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} |
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} // namespace publish |
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