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* Align the columns in the output of `nix-env -q'.

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This commit is contained in:
Eelco Dolstra 2004-07-01 13:35:10 +00:00
parent 593bc23d8b
commit 8f6254e823
1 changed files with 36 additions and 4 deletions
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40
src/nix-env/main.cc
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@ -460,6 +460,36 @@ static bool cmpDrvByName(const DrvInfo & a, const DrvInfo & b)
}
typedef list<Strings> Table;
void printTable(Table & table)
{
int nrColumns = table.front().size();
vector<int> widths;
widths.resize(nrColumns);
for (Table::iterator i = table.begin(); i != table.end(); ++i) {
assert(i->size() == nrColumns);
Strings::iterator j; int column;
for (j = i->begin(), column = 0; j != i->end(); ++j, ++column)
if (j->size() > widths[column]) widths[column] = j->size();
}
for (Table::iterator i = table.begin(); i != table.end(); ++i) {
Strings::iterator j; int column;
for (j = i->begin(), column = 0; j != i->end(); ++j, ++column)
{
cout << *j;
if (column < nrColumns - 1)
cout << string(widths[column] - j->size() + 2, ' ');
}
cout << endl;
}
}
static void opQuery(Globals & globals,
Strings opFlags, Strings opArgs)
{
@ -519,6 +549,8 @@ static void opQuery(Globals & globals,
}
/* Print the desired columns. */
Table table;
for (DrvInfoList::iterator i = drvs2.begin(); i != drvs2.end(); ++i) {
Strings columns;
@ -537,11 +569,11 @@ static void opQuery(Globals & globals,
if (printSystem) columns.push_back(i->system);
if (printDrvPath) columns.push_back(i->drvPath);
for (Strings::iterator j = columns.begin(); j != columns.end(); ++j)
cout << *j << " ";
cout << endl;
table.push_back(columns);
}
printTable(table);
}