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Remove redundant len check around loop (#27464)

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This pull request is a minor code cleanup.

From the Go specification (https://go.dev/ref/spec#For_range):

> "1. For a nil slice, the number of iterations is 0."
> "3. If the map is nil, the number of iterations is 0."

`len` returns 0 if the slice or map is nil
(https://pkg.go.dev/builtin#len). Therefore, checking `len(v) > 0`
before a loop is unnecessary.

---

At the time of writing this pull request, there wasn't a lint rule that
catches these issues. The closest I could find is
https://staticcheck.dev/docs/checks/#S103

Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
This commit is contained in:
Eng Zer Jun 2023-10-06 14:49:37 +08:00 • committed by GitHub
parent 6cdeb7798b
commit 13d5d2e711
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 31 additions and 45 deletions
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50
modules/git/repo_commit.go
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@ -116,17 +116,13 @@ func (repo *Repository) searchCommits(id SHA1, opts SearchCommitsOptions) ([]*Co
c.AddArguments("-i")
// add authors if present in search query
if len(opts.Authors) > 0 {
for _, v := range opts.Authors {
c.AddOptionFormat("--author=%s", v)
}
for _, v := range opts.Authors {
c.AddOptionFormat("--author=%s", v)
}
// add committers if present in search query
if len(opts.Committers) > 0 {
for _, v := range opts.Committers {
c.AddOptionFormat("--committer=%s", v)
}
for _, v := range opts.Committers {
c.AddOptionFormat("--committer=%s", v)
}
// add time constraints if present in search query
@ -150,10 +146,8 @@ func (repo *Repository) searchCommits(id SHA1, opts SearchCommitsOptions) ([]*Co
// add remaining keywords from search string
// note this is done only for command created above
if len(opts.Keywords) > 0 {
for _, v := range opts.Keywords {
cmd.AddOptionFormat("--grep=%s", v)
}
for _, v := range opts.Keywords {
cmd.AddOptionFormat("--grep=%s", v)
}
// search for commits matching given constraints and keywords in commit msg
@ -168,25 +162,23 @@ func (repo *Repository) searchCommits(id SHA1, opts SearchCommitsOptions) ([]*Co
// if there are any keywords (ie not committer:, author:, time:)
// then let's iterate over them
if len(opts.Keywords) > 0 {
for _, v := range opts.Keywords {
// ignore anything not matching a valid sha pattern
if IsValidSHAPattern(v) {
// create new git log command with 1 commit limit
hashCmd := NewCommand(repo.Ctx, "log", "-1", prettyLogFormat)
// add previous arguments except for --grep and --all
addCommonSearchArgs(hashCmd)
// add keyword as <commit>
hashCmd.AddDynamicArguments(v)
for _, v := range opts.Keywords {
// ignore anything not matching a valid sha pattern
if IsValidSHAPattern(v) {
// create new git log command with 1 commit limit
hashCmd := NewCommand(repo.Ctx, "log", "-1", prettyLogFormat)
// add previous arguments except for --grep and --all
addCommonSearchArgs(hashCmd)
// add keyword as <commit>
hashCmd.AddDynamicArguments(v)
// search with given constraints for commit matching sha hash of v
hashMatching, _, err := hashCmd.RunStdBytes(&RunOpts{Dir: repo.Path})
if err != nil || bytes.Contains(stdout, hashMatching) {
continue
}
stdout = append(stdout, hashMatching...)
stdout = append(stdout, '\n')
// search with given constraints for commit matching sha hash of v
hashMatching, _, err := hashCmd.RunStdBytes(&RunOpts{Dir: repo.Path})
if err != nil || bytes.Contains(stdout, hashMatching) {
continue
}
stdout = append(stdout, hashMatching...)
stdout = append(stdout, '\n')
}
}