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Merge remote-tracking branch 'upstream/master' into path-in-exec

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This commit is contained in:
John Ericson 2024-08-19 10:42:12 -04:00
commit 67a54d47c5
16 changed files with 446 additions and 17 deletions
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2
src/nix-build/nix-build.cc
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@ -163,7 +163,7 @@ static void main_nix_build(int argc, char * * argv)
script = argv[1];
try {
auto lines = tokenizeString<Strings>(readFile(script), "\n");
if (std::regex_search(lines.front(), std::regex("^#!"))) {
if (!lines.empty() && std::regex_search(lines.front(), std::regex("^#!"))) {
lines.pop_front();
inShebang = true;
for (int i = 2; i < argc; ++i)

92
src/nix/flake.cc
View file

@ -17,6 +17,7 @@
#include "eval-cache.hh"
#include "markdown.hh"
#include "users.hh"
#include "terminal.hh"
#include <filesystem>
#include <nlohmann/json.hpp>
@ -1269,24 +1270,97 @@ struct CmdFlakeShow : FlakeCommand, MixJSON
auto showDerivation = [&]()
{
auto name = visitor.getAttr(state->sName)->getString();
std::optional<std::string> description;
if (auto aMeta = visitor.maybeGetAttr(state->sMeta)) {
if (auto aDescription = aMeta->maybeGetAttr(state->sDescription))
description = aDescription->getString();
}
if (json) {
std::optional<std::string> description;
if (auto aMeta = visitor.maybeGetAttr(state->sMeta)) {
if (auto aDescription = aMeta->maybeGetAttr(state->sDescription))
description = aDescription->getString();
}
j.emplace("type", "derivation");
j.emplace("name", name);
j.emplace("description", description ? *description : "");
} else {
logger->cout("%s: %s '%s'",
headerPrefix,
auto type =
attrPath.size() == 2 && attrPathS[0] == "devShell" ? "development environment" :
attrPath.size() >= 2 && attrPathS[0] == "devShells" ? "development environment" :
attrPath.size() == 3 && attrPathS[0] == "checks" ? "derivation" :
attrPath.size() >= 1 && attrPathS[0] == "hydraJobs" ? "derivation" :
"package",
name);
"package";
if (description && !description->empty()) {
// Takes a string and returns the # of characters displayed
auto columnLengthOfString = [](std::string_view s) -> unsigned int {
unsigned int columnCount = 0;
for (auto i = s.begin(); i < s.end();) {
// Test first character to determine if it is one of
// treeConn, treeLast, treeLine
if (*i == -30) {
i += 3;
++columnCount;
}
// Escape sequences
// https://en.wikipedia.org/wiki/ANSI_escape_code
else if (*i == '\e') {
// Eat '['
if (*(++i) == '[') {
++i;
// Eat parameter bytes
while(*i >= 0x30 && *i <= 0x3f) ++i;
// Eat intermediate bytes
while(*i >= 0x20 && *i <= 0x2f) ++i;
// Eat final byte
if(*i >= 0x40 && *i <= 0x73) ++i;
}
else {
// Eat Fe Escape sequence
if (*i >= 0x40 && *i <= 0x5f) ++i;
}
}
else {
++i;
++columnCount;
}
}
return columnCount;
};
// Maximum length to print
size_t maxLength = getWindowSize().second > 0 ? getWindowSize().second : 80;
// Trim the description and only use the first line
auto trimmed = trim(*description);
auto newLinePos = trimmed.find('\n');
auto length = newLinePos != std::string::npos ? newLinePos : trimmed.length();
auto beginningOfLine = fmt("%s: %s '%s'", headerPrefix, type, name);
auto line = fmt("%s: %s '%s' - '%s'", headerPrefix, type, name, trimmed.substr(0, length));
// If we are already over the maximum length then do not trim
// and don't print the description (preserves existing behavior)
if (columnLengthOfString(beginningOfLine) >= maxLength) {
logger->cout("%s", beginningOfLine);
}
// If the entire line fits then print that
else if (columnLengthOfString(line) < maxLength) {
logger->cout("%s", line);
}
// Otherwise we need to truncate
else {
auto lineLength = columnLengthOfString(line);
auto chopOff = lineLength - maxLength;
line.resize(line.length() - chopOff);
line = line.replace(line.length() - 3, 3, "...");
logger->cout("%s", line);
}
}
else {
logger->cout("%s: %s '%s'", headerPrefix, type, name);
}
}
};